[Bug 61708] [SNB/SNA] MPlayer crashes Xserver

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=61708

--- Comment #15 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to comment #14)
> Can I patch kernel 3.8 to act as kernel 3.7
> or driver to act with kernel 3.8 same as with kernel 3.7 ?

Option "SwapbuffersWait" "false"

> Can be added compile or runtime time option to kernel or driver  to revert
> acting?

It does a runtime check that you are subverting.

> Can that root-only interface be modified to work for certain non-root user?

No, in order to do vsync'ed updates one needs to write to hardware registers.
It was such a fragile single purpose interface that we created a general
purpose interface so that we could do such ugly hardware fixups from userspace
within the command buffers.

> There are devices like /dev/dri/card0, which allows only some users to talk
> with kernel. Can be something like that used for that  vsync'ed update?

It is using GEM to do the updates. You've just broken the code and so get to
fix it.

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