On 18.04.2012 01:50, Jean-Yves Avenard wrote: > On 18 April 2012 04:07, dargllun<firstname.lastname@example.org> wrote:
>> a) fglrx:
>> - unstable feature set
>> - flakey suspend behaviour (by itself a no-go for me)
>> - no /sys/class/drm/ interface for HDMI hotplug scripting
>> - Xv: tearing, jittery
>> - OpenGL: tearing, jittery
> As a side note, last week I upgraded to Ubuntu 12.04 and also tried
> the latest ATI drivers as of early April 2012.
> OpenGL painter with OpenGL rendering was just perfect. I had some
> tearing which disappeared after I set the "Tear-free desktop" option.
> I was very pleased. It worked brilliantly and the quality was as good
> as it could be (when using non-nvidia deinterlacers that is)..
Ok, so I took up the challenge and installed fglrx 12.3. Unfortunately I
was not as pleased. BTW, for testing I usually not only play SD and HD
material, but I always try a canned clip from some news channel which
contains a text scroll at the bottom - the ultimate test for the
AMD HD3200 RS780 GPU (r600),
AMD Athlon(tm) 64 X2 Dual Core Processor 5000+
MythTV 0.25 fixes from mythrepos as of today
In all configurations the kernel(2x) deint was used, as it gives me the
best results while treating the CPU gently.
- Qt painter, xv-blit: nearly ok, but occasionaly hic-ups.
- Qt painter, Open-GL, tear-free off: nearly ok, but occasionaly hic-ups.
- Qt painter, Open-GL, tear-free on: good rendering, but burning CPU
cycles as crazy. One core fully loaded. Quitting sometimes resulted in a
frozen image and non-responding frontend, but the X session could at
least be terminated
- OpenGL painter, Open-GL: frozen GPU, had to reboot.
So that's leading me nowhere really. Also, this GPU is rather old and I
wouldn't be surprised if AMD stopped supporting it.
On the bright side, the OSS drivers have very much improved over the
last years, and substantially so by AMD devs. It would be good if the
OSS drivers would be supported by mythtv, cause they'll stay around. For
the time being, Xv is mandatory, but perhaps OpenGL will be an option in
the future if it's real-time performance improves. (It doesn't appear to
be a CPU issue as Lawrence and I have observed!)
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