[Bug 77009] 24P playback video signal loss with latest DRI patches

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77009

--- Comment #6 from Rackow, Detlev <detlev.rackow at googlemail.com> ---
Hi, I also have issues with OE 3.95.x and Radeon 6320 (AMD E-450). On my
device, issues happened with all fractional frequencies (23.9x, 29.9x, 59.9x
hz)

The test-version which Peter Fruehberger posted and which contains your
preliminary patch changed the behaviour.

With that new patch fractionalmodes (23.976, ... , ... ) are now working
fine, but with 25hz I have a problem. (Peter supposes that it's actually 50i
and I believe this too, but I'm just a user and I can only report the frequency
that I select in the XBMC-settings)

When I set the rate to 25Hz, the picture begins to shiver up and down a few
millimeters. When I don't acknowledge the new rate, XBMC switches back to the
old rate, and the picture is immediately stable as ever. 

This effect used to happen with all fractional rates in OE 3.95.x, while 25Hz
worked fine. With the mentioned test-version it is gone on the fractional
rates, but now it happens on 25Hz (or 50i, as Peter says).

As instructed, I booted OE with the kernel-parameter drm.debug=0xe and took
dmesg and Xorg.0.log immediately after switching to 25hz and falling back.

This is my first post on this site, I hope I don't mess it ;)

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