[Bug 77691] kernel: [drm] stuck on render ring

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=77691

Mihail Kasadjikov <hamer.mk at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |hamer.mk at gmail.com

--- Comment #1 from Mihail Kasadjikov <hamer.mk at gmail.com> ---
I have this problem too on Lenovo Thinkpad X201 laptop with Intel Core i7 L-620
CPU.
I use Debian jessie (testing) 64-bit with KDE.
The problem appears when I try to use hardware video decoding via vaapi (I use
vlc player) after some minutes of playback.
I noticed the problem appears when I use "i915.i915_enable_rc6=1" in kernel
cmdline. Because of this I can't use the power saving for Intel's GPU. 
See also https://bugs.freedesktop.org/show_bug.cgi?id=71432

$ uname -a
Linux h13 3.14.6-zen #1 ZEN SMP Fri Jun 13 03:05:48 FET 2014 x86_64 GNU/Linux

$ cat /proc/cmdline 
root=/dev/mapper/h13-root ro elevator=bfq ipv6.disable=1 no_console_suspend=1
pcie_aspm=powersave i915.i915_enable_rc6=1 video=inteldrmfb:1280x800R-8 quiet
intel_iommu=igfx_off resume=/dev/mapper/h13-swap zswap.enabled=1

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