Mailing List Archive

S-video/nvidia problems
Hi, all. I hope it is OK to post this question here. I have posted to
Ubuntu forums and to Nvidia forums, and gotten no answer either place. I
am at my wits' end as to how to solve this problem so that I can use
MythTV.

I'm trying to get my desktop to output to my TV as a second display (for
MythTV viewing).

OS: Ubuntu 9.04
Graphics card: nVidia Corporation C51 [GeForce 6150 LE]

I have run an s-video cable from the computer to the TV. I tested the
cable and it does work, and the TV does accept s-video in (from my TiVo)
successfully.

As root, I ran nvidia-settings -> X Server Display Configuration. My
regular monitor shows up (with a specified resolution), and TV-0, which
is marked "(disabled)" where the resolution should be.

Select "TV-0", "configure...", "TwinView." Resolution set to "Auto",
Position set to "Right-of". Hit "apply". Get error: "Failed to set
MetaMode(1) 'CRT-0: 1280x1024 @1280x1024 +0+0, TV-0: nvidia-auto-select
@1024x768 +1280+0' (Mode 2304x1024, id: 50) on X screen 0 \n Would you
like to remove this MetaMode?" I have tried choosing both "yes" and
"no," and the message goes away, and the TV-0 box is now no longer
"disabled," but my TV still doesn't have any picture coming from the
computer.

I have also tried setting "configuration" to "separate X screen" instead
of "TwinView," and the "position" to "Clones" instead of "Right of".
Still no picture to the TV.

In all cases, I have of course saved the settings to /etc/X11/xorg.conf
and restarted X.

I do think something is getting through to the TV because when I reboot
I see a flicker, but otherwise I have gotten no signal at all to it.

Everything I read online suggests that what I am doing should work. Does
anyone have any suggestions for me? Is there some weird gotcha I'm
missing?

Thank you for any help you can give!

Jessica
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Re: S-video/nvidia problems [ In reply to ]
On Mon, July 26, 2010 2:53 pm, Jessica Perry Hekman wrote:
> > Everything I read online suggests that what I am doing should work. Does
> anyone have any suggestions for me? Is there some weird gotcha I'm
> missing?
>


The nvidia driver does autodetection on startup. The TV has to be on and
the s-video cable connected when you boot the system.

Second (and more remote) possibility: improper impedance on the TV end.
I've run into this and it was horribly confusing. The TV output on the
card detects a connection by checking for a 75 ohm load. In my case, the
load was closer to 22K ohm, and the card would simply think that nothing
was connected. The net result was something similar to what you're
seeing:

A brief flicker as the driver checked for a connection, and then nothing.

Try a different TV or, if you have an s-video to composite adapter, try
that to a different TV, run the s-video cable to your VCR and then to your
TV....

--
If you have eight hours to chop down a tree
spend six sharpening your axe.
--Abraham Lincoln

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Re: S-video/nvidia problems [ In reply to ]
> The nvidia driver does autodetection on startup.  The TV has to be on and
> the s-video cable connected when you boot the system.

I can confirm this with my NVidia 8400 GS. If S-Video is not attached
at power-on, I get no output from the card (though my TV doesn't need
to be turned on... YMMV). Also, some BIOSes have a setting to
initialize AGP or PCI video cards first -- try the other setting.

Also, I didn't have to do any X configuration -- if I boot up with no
VGA/DVI monitor connected, X just uses TV-0 automatically (possibly
because I installed the NVidia driver while S-Video was the only
connection).
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Re: S-video/nvidia problems [ In reply to ]
On Mon, July 26, 2010 3:41 pm, Tyler T wrote:
>> The nvidia driver does autodetection on startup.  The TV has to be on
>> and
>> the s-video cable connected when you boot the system.
>
> I can confirm this with my NVidia 8400 GS. If S-Video is not attached
> at power-on, I get no output from the card (though my TV doesn't need
> to be turned on... YMMV).

My TV depends on the power saver setting; if I set it to "fast on" it
doesn't have to be on as it keeps all inputs 'hot'. OTOH if I set the TV
to "power save" it shuts down all inputs and the card won't see the TV at
all.

--
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spend six sharpening your axe.
--Abraham Lincoln

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Re: S-video/nvidia problems [ In reply to ]
Jessica Perry Hekman wrote:
> Hi, all. I hope it is OK to post this question here. I have posted to
> Ubuntu forums and to Nvidia forums, and gotten no answer either place. I
> am at my wits' end as to how to solve this problem so that I can use
> MythTV.
>
> I'm trying to get my desktop to output to my TV as a second display (for
> MythTV viewing).
>...
>
> Thank you for any help you can give!
>
> Jessica

"Automagic" is wonderful, when it works.
May be time to try a manual xorg.conf.
I've reused the same xorg.conf since Dapper days, rather than fight with
reconfiguring each time I upgrade. Currently 10.04 with nvidia compiled
from source and working fine.

I've always used two xscreens while working on MythTV so I can work from
the LCD and look over at the TV to see the result.
Never tried TwinView so I have no idea how to make it work.

My (ancient pos tube) TV is connected via Component and I have to use
some custom Options to make it work.
<http://home.pacbell.net/clayt/xorg.conf.dapper.txt>
Some Options are deprecated now and x simply ignores them.
cat /var/log/Xorg.0.log to see which are ignored.

Once I have everything working, I comment out the LCD portions of the
xorg.conf. Once I'm satisfied it's stable with just the TV, I remove all
the commented stuff to tidy up the xorg.conf.
<http://home.pacbell.net/clayt/xorg.conf.txt>
(this is an older version. I've since trimmed out unused resolutions and
depreciated options)

When setting up dual xscreens on a new frontend (dual LCDs), I ran
nvidia-settings to get a baseline xorg.conf, that didn't work, then add
monitor specific info (resolution, refresh, etc.) to each screen until
it does.

iirc, 9.04 has that absolutely hateful 'failsafe' x that automatically
falls back to a default lo res screen if the custom xorg.conf doesn't
work. Impossible to work with so I disable it.
All the tweaking is done from a terminal so you have to be handy with a
non GUI editor like vi.

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Re: S-video/nvidia problems [ In reply to ]
Thanks so much to everyone for your suggestions.

I had already tested booting the computer with the TV on, so that
doesn't appear to be the solution.

I'll try out the other suggestions that people sent this evening when
I'm off work, and will report back tonight or tomorrow.

I really appreciate the help; I was completely stymied and now I have
things to try.

Jessica

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Re: S-video/nvidia problems [ In reply to ]
So last night I shut down my computer, unplugged the LCD monitor, and
rebooted with only the TV attached. Success -- it came up with the
display showing on the TV! (This also means that the problem does not
have to do with different ohm loads.)

However, I do need to have the LCD work as well, because this computer
is my desktop, not a dedicated MythTV box.

I rebooted with the LCD plugged back in and was back to square one. So
at this point I seem to only be able to have one work at a time.

I also checked BIOS settings. There is a display setting which is
currently set to "PCI." Other options are "PCI-E" and "Onboard." Not
sure if I should try one of those? I don't actually know what the
different options mean.

I have recently upgraded to Ubuntu 9.10 (my previous email had said
9.04). Graphics card is an nVidia Corporation C51 [GeForce 6150 LE].

Is it time to try xorg.conf hacking? I hope not.

Jessica


> Jessica Perry Hekman wrote:
> >Hi, all. I hope it is OK to post this question here. I have posted
> >to Ubuntu forums and to Nvidia forums, and gotten no answer either
> >place. I am at my wits' end as to how to solve this problem so
> >that I can use MythTV.
> >
> >I'm trying to get my desktop to output to my TV as a second
> >display (for MythTV viewing).
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Re: S-video/nvidia problems [ In reply to ]
>> Jessica Perry Hekman wrote:
>> >Hi, all. I hope it is OK to post this question here. I have posted
>> >to Ubuntu forums and to Nvidia forums, and gotten no answer either
>> >place. I am at my wits' end as to how to solve this problem so
>> >that I can use MythTV.
>> >
>> >I'm trying to get my desktop to output to my TV as a second
>> >display (for MythTV viewing).
> Jessica Perry Hekman wrote:
>> So last night I shut down my computer, unplugged the LCD monitor, and
>> rebooted with only the TV attached. Success -- it came up with the
>> display showing on the TV! (This also means that the problem does not
>> have to do with different ohm loads.)
>>
>> However, I do need to have the LCD work as well, because this computer
>> is my desktop, not a dedicated MythTV box.
>>
>> I rebooted with the LCD plugged back in and was back to square one. So
>> at this point I seem to only be able to have one work at a time.
>>
>> I also checked BIOS settings. There is a display setting which is
>> currently set to "PCI." Other options are "PCI-E" and "Onboard." Not
>> sure if I should try one of those? I don't actually know what the
>> different options mean.
>>
>> I have recently upgraded to Ubuntu 9.10 (my previous email had said
>> 9.04). Graphics card is an nVidia Corporation C51 [GeForce 6150 LE].
>>
>> Is it time to try xorg.conf hacking? I hope not.
>>
>> Jessica
>>
>>

Once the TV was up did you plug the LCD back in? It's ok to hot swap
monitors...
Now that you have both working, run sudo nvidia-settings and configure
the layout you want. TV will probably be screen0 so switch them around
so LCD is screen0 and TV is screen1. I'd use dual xscreens but if you
want to try TwinView, go for it.
Write the settings to a xorg.conf and now you have a base to start tweaking.
Always make a backup copy of xorg.conf before making changes so you can
fall back to it if the changes don't work.
I sometimes had a dozen copies before I got one that worked the way I
wanted.

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Re: S-video/nvidia problems [ In reply to ]
On Wed, Jul 28, 2010 at 09:34:21AM -0700, Clay wrote:

> Once the TV was up did you plug the LCD back in? It's ok to hot swap
> monitors...

Thanks for all the suggestions!

I did try plugging the LCD back in, actually, but the monitor insisted
that it had no signal when I did. So far as I can tell, my video card
really wants to output to one or the other. I can't figure out how to
tell it to output to both.

> Now that you have both working, run sudo nvidia-settings and
> configure the layout you want. TV will probably be screen0 so switch
> them around so LCD is screen0 and TV is screen1. I'd use dual
> xscreens but if you want to try TwinView, go for it.

When I run nvidia-settings (after rebooting with the LCD plugged in so I
have a decent monitor to use!), I see two displays in the layout: my LCD
(HP L1906) and TV-0. TV-0 is labelled "disabled." I configure TV-0 so
that it is enabled, save to xorg.conf (with a backup made first!) and
restart X (with the TV turned on). When X comes back up and I run
nvidia-settings again, TV-0 has been turned to "disabled" again.

I am flummoxed as to why TV-0 gets disabled. I recognize that it may be
time to tweak xorg.conf directly, but have no idea where to start with
that -- any suggestions would be very welcome.

Thanks,
Jessica
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Re: S-video/nvidia problems [ In reply to ]
On Wed, July 28, 2010 6:19 pm, Jessica Perry Hekman wrote:
> On Wed, Jul 28, 2010 at 09:34:21AM -0700, Clay wrote:
>
>> Once the TV was up did you plug the LCD back in? It's ok to hot swap
>> monitors...
>
> Thanks for all the suggestions!
>
> I did try plugging the LCD back in, actually, but the monitor insisted
> that it had no signal when I did. So far as I can tell, my video card
> really wants to output to one or the other. I can't figure out how to
> tell it to output to both.

OK, try the nouveau driver, the xorg nvidia driver. It may run both, and
it definitely provides better logging than nvidia.

I know this won't do much for you for myth, but it might help you get to
the reason why it's only doing one or the other.

Also, try upgrading to the latest xorg and latest nvidia driver.

--Yan

--
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spend six sharpening your axe.
--Abraham Lincoln

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Re: S-video/nvidia problems [ In reply to ]
On Wed, Jul 28, 2010 at 2:19 PM, Jessica Perry Hekman
<jphekman@arborius.net> wrote:
> On Wed, Jul 28, 2010 at 09:34:21AM -0700, Clay wrote:
>
>> Once the TV was up did you plug the LCD back in? It's ok to hot swap
>> monitors...
>
> Thanks for all the suggestions!
>
> I did try plugging the LCD back in, actually, but the monitor insisted
> that it had no signal when I did. So far as I can tell, my video card
> really wants to output to one or the other. I can't figure out how to
> tell it to output to both.
>
>> Now that you have both working, run sudo nvidia-settings and
>> configure the layout you want. TV will probably be screen0 so switch
>> them around so LCD is screen0 and TV is screen1. I'd use dual
>> xscreens but if you want to try TwinView, go for it.
>
> When I run nvidia-settings (after rebooting with the LCD plugged in so I
> have a decent monitor to use!), I see two displays in the layout: my LCD
> (HP L1906) and TV-0. TV-0 is labelled "disabled." I configure TV-0 so
> that it is enabled, save to xorg.conf (with a backup made first!) and
> restart X (with the TV turned on). When X comes back up and I run
> nvidia-settings again, TV-0 has been turned to "disabled" again.
>
> I am flummoxed as to why TV-0 gets disabled. I recognize that it may be
> time to tweak xorg.conf directly, but have no idea where to start with
> that -- any suggestions would be very welcome.
>
> Thanks,
> Jessica
>

You may want to find the specs for your video card/motherboard (the
6150 is an on motherboard chip right?) and make sure it supports dual
monitors.

Cheers,
James
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Re: S-video/nvidia problems [ In reply to ]
> When I run nvidia-settings (after rebooting with the LCD plugged in so I
> ...
> When X comes back up and I run
> nvidia-settings again, TV-0 has been turned to "disabled" again.

I had a similar problem to this (custom overscan reset to default
after X restart/reboot), and here is my solution. When I saved the
settings in the nvidia-settings utility, it did NOT save an xorg.conf
file -- it saved a .nvidia-settings-rc file in my home directory. This
file must be loaded manually with the command

nvidia-settings -l

each time X is launched. I placed the above command in my .xinitrc
file just prior to my window manager being launched, and now my
settings are restored as desired.

For more information, see "3. Loading Settings Automatically" on
http://linux.die.net/man/1/nvidia-settings
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Re: S-video/nvidia problems [ In reply to ]
As far as I can recall, the 61xx Nvidia devices do not support
multiple devices where one is TV-out. They may support dual monitor
modes for combinations of VGA, DVI, and/or HDMI monitors, but it's
either TV-out or no TV-out.

Craig.
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Re: S-video/nvidia problems [ In reply to ]
On Thu, Jul 29, 2010 at 1:20 PM, Craig Huff <huffcslists@gmail.com> wrote:
> As far as I can recall, the 61xx Nvidia devices do not support
> multiple devices where one is TV-out.  They may support dual monitor
> modes for combinations of VGA, DVI, and/or HDMI monitors, but it's
> either TV-out or no TV-out.

The readme file is very long but very informative.

on ubuntu systems it is at /usr/share/doc/nvidia-current/README.txt.gz

zless is a convenient way to read zipped text files.



>
> Craig.
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Re: S-video/nvidia problems [ In reply to ]
Replying from phone, excuse topquote.


I have a 6150 motherboard. It supports 1 analog and 1 digital at the
same time. Plug in your LCD via dvi and you can use both.


On Thursday, July 29, 2010, Jessica Perry Hekman <jphekman@arborius.net> wrote:
> On Wed, Jul 28, 2010 at 09:34:21AM -0700, Clay wrote:
>
>> Once the TV was up did you plug the LCD back in? It's ok to hot swap
>> monitors...
>
> Thanks for all the suggestions!
>
> I did try plugging the LCD back in, actually, but the monitor insisted
> that it had no signal when I did. So far as I can tell, my video card
> really wants to output to one or the other. I can't figure out how to
> tell it to output to both.
>
>> Now that you have both working, run sudo nvidia-settings and
>> configure the layout you want. TV will probably be screen0 so switch
>> them around so LCD is screen0 and TV is screen1. I'd use dual
>> xscreens but if you want to try TwinView, go for it.
>
> When I run nvidia-settings (after rebooting with the LCD plugged in so I
> have a decent monitor to use!), I see two displays in the layout: my LCD
> (HP L1906) and TV-0. TV-0 is labelled "disabled." I configure TV-0 so
> that it is enabled, save to xorg.conf (with a backup made first!) and
> restart X (with the TV turned on). When X comes back up and I run
> nvidia-settings again, TV-0 has been turned to "disabled" again.
>
> I am flummoxed as to why TV-0 gets disabled. I recognize that it may be
> time to tweak xorg.conf directly, but have no idea where to start with
> that -- any suggestions would be very welcome.
>
> Thanks,
> Jessica
> _______________________________________________
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> mythtv-users@mythtv.org
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>
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Re: S-video/nvidia problems [ In reply to ]
On Thu, Jul 29, 2010 at 10:05:22PM +1000, Bill Williamson wrote:

> I have a 6150 motherboard. It supports 1 analog and 1 digital at the
> same time. Plug in your LCD via dvi and you can use both.

I looked at the back of my desktop, and it does not appear to have a DVI
connector. I do believe it to be a 6150 LE, however. Am I missing
something?

Jessica
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Re: S-video/nvidia problems [ In reply to ]
On Thu, Jul 29, 2010 at 08:26:20PM +1200, Nick Rout wrote:

> On Thu, Jul 29, 2010 at 1:20 PM, Craig Huff <huffcslists@gmail.com> wrote:
> > As far as I can recall, the 61xx Nvidia devices do not support
> > multiple devices where one is TV-out.  They may support dual monitor
> > modes for combinations of VGA, DVI, and/or HDMI monitors, but it's
> > either TV-out or no TV-out.
>
> The readme file is very long but very informative.
>
> on ubuntu systems it is at /usr/share/doc/nvidia-current/README.txt.gz

OK, so the README appears to contradict Craig's assertion that TV-out is
all or nothing:

NVIDIA GPU-based graphics cards with a TV-Out connector can use a
television as another display device (the same way that it would use a
CRT or digital flat panel). The TV can be used by itself, or in
conjunction with another display device in a TwinView or multiple X
screen configuration. If a TV is the only display device connected to
your graphics card, it will be used as the primary display when you
boot your system (i.e. the console will come up on the TV just as if it
were a CRT).

...although it is possible that the 6150s are an exception, I guess.

It looks like it is time for me to try to mess with xorg.conf directly,
using the information in this file. I will take a shot at it (and report
back with problems, I am sure). Thanks so much for all the information,
everyone.

Jessica

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Re: S-video/nvidia problems [ In reply to ]
Jessica Perry Hekman wrote:
> On Thu, Jul 29, 2010 at 08:26:20PM +1200, Nick Rout wrote:
>
>> On Thu, Jul 29, 2010 at 1:20 PM, Craig Huff <huffcslists@gmail.com> wrote:
>> > As far as I can recall, the 61xx Nvidia devices do not support
>> > multiple devices where one is TV-out. They may support dual monitor
>> > modes for combinations of VGA, DVI, and/or HDMI monitors, but it's
>> > either TV-out or no TV-out.
>>
>> The readme file is very long but very informative.
>>
>> on ubuntu systems it is at /usr/share/doc/nvidia-current/README.txt.gz
>
> OK, so the README appears to contradict Craig's assertion that TV-out is
> all or nothing:
>
> NVIDIA GPU-based graphics cards with a TV-Out connector can use a
> television as another display device (the same way that it would use a
> CRT or digital flat panel). The TV can be used by itself, or in
> conjunction with another display device in a TwinView or multiple X
> screen configuration. If a TV is the only display device connected to
> your graphics card, it will be used as the primary display when you
> boot your system (i.e. the console will come up on the TV just as if it
> were a CRT).
>
> ...although it is possible that the 6150s are an exception, I guess.
>
> It looks like it is time for me to try to mess with xorg.conf directly,
> using the information in this file. I will take a shot at it (and report
> back with problems, I am sure). Thanks so much for all the information,
> everyone.
>
> Jessica

If you can get an xorg,conf from nvidia-settings that has something
other than "Generic bla..." for each device, you can use that info to
build your custom xorg.
Otherwise, you'll need the refresh rates and resolutions for the LCD and
some custom settings for your TV.
LCD is easy, all the specs are published.
TV is harder since consumers are rarely interested in these settings.
Example: The picture on my TV was blue using component input unless I
had "TVStandard" HD480i in xorg. Had to dig through the manual to find
that bit of info.
The sections you'll need to have in xorg.conf are "ServerLayout",
"Device", "Monitor", and "Screen"


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Re: S-video/nvidia problems [ In reply to ]
On Wed, Jul 28, 2010 at 02:23:10PM -0600, Tyler T wrote:

> > When I run nvidia-settings (after rebooting with the LCD plugged in so I
> > ...
> > When X comes back up and I run
> > nvidia-settings again, TV-0 has been turned to "disabled" again.
>
> I had a similar problem to this (custom overscan reset to default
> after X restart/reboot), and here is my solution. When I saved the
> settings in the nvidia-settings utility, it did NOT save an xorg.conf
> file -- it saved a .nvidia-settings-rc file in my home directory. This
> file must be loaded manually with the command
>
> nvidia-settings -l
>
> each time X is launched. I placed the above command in my .xinitrc
> file just prior to my window manager being launched, and now my
> settings are restored as desired.

I tried this (and was very hopeful that it would work). I didn't have an
.xinitrc yet, but created one containing:

nvidia-settings --load-config-only &. /etc/X11/xinit/xinitrc

However, when I restarted X, TV-0 still came up "disabled." I'm not sure
if my .xinitrc is being successfully run or not at this point, or if it
is being successfully run but something else is wrong.

Looking at my .nvidia-settings-rc file, though, I am not sure that
nvidia-settings is actually generating that file when I run it. The file
says it was generated on Jul 22, even though I have re-run
nvidia-settings multiple times since then. Also, I can explicitly ask
nvidia-settings to save to xorg.conf, and I do see that that file gets
updated.

I really wanted this solution to work, but either your system is
different from mine, or -- maybe I am missing something?

Jessica


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Re: S-video/nvidia problems [ In reply to ]
>> each time X is launched. I placed the above command in my .xinitrc
>> file just prior to my window manager being launched, and now my
>> settings are restored as desired.
>
> I tried this (and was very hopeful that it would work). I didn't have an
> .xinitrc yet, but created one containing:

As I recall, there are two 'Save' buttons in nividia-settings. I don't
have my machine in front of me to check, but you might poke around in
some of the other places and see if you can find a second Save
settings or preferences button.

Also, I think the --load-settings command must be run after X has
started but before your window manager starts. You can probably ditch
the .xinitrc thing and just slip your --load-settings command into
/etc/X11/xinit/xinitrc itself, so you can slot it in at the right
spot.
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Re: S-video/nvidia problems [ In reply to ]
Jessica Perry Hekman wrote:
> On Wed, Jul 28, 2010 at 02:23:10PM -0600, Tyler T wrote:
>
>> > When I run nvidia-settings (after rebooting with the LCD plugged in so I
>> > ...
>> > When X comes back up and I run
>> > nvidia-settings again, TV-0 has been turned to "disabled" again.
>>
>> I had a similar problem to this (custom overscan reset to default
>> after X restart/reboot), and here is my solution. When I saved the
>> settings in the nvidia-settings utility, it did NOT save an xorg.conf
>> file -- it saved a .nvidia-settings-rc file in my home directory. This
>> file must be loaded manually with the command
>>
>> nvidia-settings -l
>>
>> each time X is launched. I placed the above command in my .xinitrc
>> file just prior to my window manager being launched, and now my
>> settings are restored as desired.
>
> I tried this (and was very hopeful that it would work). I didn't have an
> .xinitrc yet, but created one containing:
>
> nvidia-settings --load-config-only &. /etc/X11/xinit/xinitrc
>
> However, when I restarted X, TV-0 still came up "disabled." I'm not sure
> if my .xinitrc is being successfully run or not at this point, or if it
> is being successfully run but something else is wrong.
>
> Looking at my .nvidia-settings-rc file, though, I am not sure that
> nvidia-settings is actually generating that file when I run it. The file
> says it was generated on Jul 22, even though I have re-run
> nvidia-settings multiple times since then. Also, I can explicitly ask
> nvidia-settings to save to xorg.conf, and I do see that that file gets
> updated.
>
> I really wanted this solution to work, but either your system is
> different from mine, or -- maybe I am missing something?
>
> Jessica

While you're tinkering, have you been looking in /var/log/Xorg.0.log for
clues as to what is going on?
/sometimes/ there's useful info there. Maybe even mention of .xinitrc...

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Re: S-video/nvidia problems [ In reply to ]
On Thu, Jul 29, 2010 at 10:51:52AM -0700, Clay wrote:

> While you're tinkering, have you been looking in /var/log/Xorg.0.log
> for clues as to what is going on?
> /sometimes/ there's useful info there. Maybe even mention of .xinitrc...

Huh, that's interesting. I took a look at that file, and it mentioned
TwinView. That surprised me, because although I had tried TwinView a
couple times, I had given up on it and keep trying to configure TV-0 to
use a separate X screen instead.

So I re-ran nvidia-settings, configured TV-0 to use a separate X screen
(since the configuration is always reset when I restart X), and told the
app to write the new config out to /etc/X11/xorg.conf. Then I took a
look at that file. I see, among other things, lots of references to
TwinView (see below), which I would not have expected to be there.

Should I be concluding that nvidia-settings isn't properly generating
the xorg.conf that I expect? Maybe all this is moot and I should be
trying to write xorg.conf myself as we've already discussed, but I
thought I'd send this on and see if anyone has any insights. Selection
from xorg.conf generated by nvidia-settings is below:

Section "Screen"
Identifier "Default Screen"
Device "nVidia Corporation C51 [GeForce 6150 LE]"
Monitor "HP L1906"
DefaultDepth 24
SubSection "Display"
Modes "1280x1024" "1024x768" "832x624" "800x600" "720x400"
"640x480"
EndSubSection
EndSection

Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "TwinView" "0"
Option "TwinViewXineramaInfoOrder" "CRT-0"
Option "metamodes" "CRT: 1280x1024 +0+0; CRT: 1024x768 +0+0;
CRT: 832x624 +0+0; CRT: 800x600 +0+0; CRT: 640x480 +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection

Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 24
Option "TwinView" "0"
Option "metamodes" "TV: 800x600 +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection


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Re: S-video/nvidia problems [ In reply to ]
Jessica,

Is your Nvidia 6150 on an add-in card (PCI, PCI-e, ISA, AGP...?) or
provided on the motherboard. If the latter, you will need to review
the documentation for the video support on the motherboard. I have
several (mostly ASUS, but this may apply to other brands, as well) and
although it wasn't there in black and white with bold text and borders
around it, I came to realize they were telling me that I could have
TV-Out work or I could have something else, but not both. If the mobo
supported two video interfaces besides TV-Out, I could use both of
those non-TV-Out interfaces, but once TV-Out was in play, all else was
out of the question. For example, my ASUS M2NPV-VM mobo has these
excerpts in the specifications summary graphics section: "Dual VGA
output: DVI-D and RGB. ... Note: DVI-D only supports digital display.
You cannot convert DVI-D to output RGB signal to CRT display. ...
Note: RGB and TV-Out cannot be used simultaneously." Since I use a
VGA monitor on this system, not a newer one with DVI-D, I don't know
if the latter would support TV-Out concurrently, but it certainly
won't support TV-Out with my VGA monitor concurrently. Believe me, I
tried.

Hope this doesn't apply to you.

Craig.
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Re: S-video/nvidia problems [ In reply to ]
On Thu, Jul 29, 2010 at 06:26:32PM -0500, Craig Huff wrote:
>
> Is your Nvidia 6150 on an add-in card (PCI, PCI-e, ISA, AGP...?) or
> provided on the motherboard. If the latter, you will need to review
[...]
> Note: RGB and TV-Out cannot be used simultaneously." Since I use a
> VGA monitor on this system, not a newer one with DVI-D, I don't know
> if the latter would support TV-Out concurrently, but it certainly
> won't support TV-Out with my VGA monitor concurrently. Believe me, I
> tried.

Thanks, Craig.

It appears to be an ASUS M2NC51-AR motherboard and the video card is
"integrated," which I assume must mean it is on the motherboard. (The
machine is an HP slimline 3020n.) I'm having trouble finding detailed
specs for this motherboard with any information about how I can expect
tv-out to work, though.

As I mentioned in a previous post, there does not seem to be a DVI
connector on the graphics card, so the option of switching my monitor to
that doesn't seem to be available. :(

I guess I am suspecting that what you are warning about is in fact the
case, but I probably should make some effort to try to get it working
just in case it actually will support out to TV + monitor simultaneously
-- since my other option is buying a new computer, right? I am dreading
the xorg.conf hacking, though, so if anyone has insights about the ASUS
M2NC51-AR motherboard, they would be welcomed.

You guys have been so helpful. I really appreciate it.

Jessica

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Re: S-video/nvidia problems [ In reply to ]
Jessica Perry Hekman wrote:
> On Thu, Jul 29, 2010 at 06:26:32PM -0500, Craig Huff wrote:
>
>> Is your Nvidia 6150 on an add-in card (PCI, PCI-e, ISA, AGP...?) or
>> provided on the motherboard. If the latter, you will need to review
>>
> [...]
>
>> Note: RGB and TV-Out cannot be used simultaneously." Since I use a
>> VGA monitor on this system, not a newer one with DVI-D, I don't know
>> if the latter would support TV-Out concurrently, but it certainly
>> won't support TV-Out with my VGA monitor concurrently. Believe me, I
>> tried.
>>
>
> Thanks, Craig.
>
> It appears to be an ASUS M2NC51-AR motherboard and the video card is
> "integrated," which I assume must mean it is on the motherboard. (The
> machine is an HP slimline 3020n.) I'm having trouble finding detailed
> specs for this motherboard with any information about how I can expect
> tv-out to work, though.
>

If it's integrated, does it have shared memory? Can you increase the
amount of memory?

--

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It is not this day!
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