Xorg 1.11.3 + compiz + Ati crashes playing video [Solved]

[DanAlucard]

Context:
-> Sabayon Fully updated (kernel 3.2-r1 and Xorg 1.11.3)
-> KDE desktop
-> Compiz-fusion with direct rendering
-> AMD/Ati HD5570 video card with up-to-date ati-drivers (11.12)

Problem:
Yesterday, I installed the new Xorg from Entropy, and everything worked well until I wanted to view a video using VLC with GPU acceleration. Xorg crashed and restarted (prompting me back to KDM login). Here is the Xorg log
The first thing I've tried is to disable compiz and enable KWin (without any desktop effect) and I can view my videos without problem, but I really hate KWin and I wanted Compiz back, so...

I've tried reinstalling Compiz and Compiz-fusion packages but the problem persisted when enabling compiz.
So, I tried to reinstall ati-drivers and saw this message at the end of installation process:

* If you experience unexplained segmentation faults and kernel crashes
* with this driver and multi-threaded applications such as wine,
* set UseFastTLS in xorg.conf to either 0 or 1, but not 2.

But I don't know where xorg.conf is. Whereis says:
xorg: /usr/lib/xorg /usr/lib64/xorg /usr/include/xorg
Also, i don't know if this will be dangerous or might break something else.

After reinstalling ati-drivers and rebooting the problem persists.

Any ideas??

[Fitzcarraldo]

Re: desktop crash plaing media after last update. Switch from XVideo to OpenGL output in your media players.

[DanAlucard]

thanks fitz.

I've searched in this section and forgot to search in general one before posting.
in VLC, I switched to GLX and it works.
in smplayer, I switched to "gl (fast for ATI cards)" and have no issues so far.

it works like a chair ( sorry ezioze, I couldn't resist it )

again, thanks and sorry for reposting.
Marking as solved

[salaneking]

Thanks this solved a problem with tvtime doing the same thing I finally solved it by masking "<=x11-drivers/ati-drivers-11.8" in /etc/entropy/packages/package.mask edit! Didn't work for me the ati-drivers still got upgraded. the other option left me without mouse or keyboard. Looks like a reinstall again.

[Fitzcarraldo]

Just a 'heads up': I've just installed ati-drivers-12.2, and the XVideo (Xv) problem has been fixed. I can again play videos with media players set to use XVideo (Xv) instead of OpenGL. Likewise, the X.Org Server 1.11.4 no longer crashes when the other party enables their Web cam in Skype.