Hi, Unfortunately I'm not really comfortable editing code, I'm using the current X11 and nouveau from Debian Jessie repos. I've noticed that this begun to happen on Debian Jessie, Debian Wheezy (The current stable) don't have this problem.
https://packages.debian.org/wheezy/xserver-xorg-video-nouveau https://packages.debian.org/jessie/xserver-xorg-video-nouveau If you tell me exactly what file to modify I will try. My guess about the issue is the GPU rendering of the web browsers is somehow conflicting with video players/3D apps/games since this lockup is much rarer when a single application is using the GPU, either for GL rendering or some video decoding task.
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