<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - [ILK] GPU hung with h.264 video decoding" href="https://bugs.freedesktop.org/show_bug.cgi?id=71432#c18">Comment # 18</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - [ILK] GPU hung with h.264 video decoding" href="https://bugs.freedesktop.org/show_bug.cgi?id=71432">bug 71432</a> from <a class="email" href="mailto:hamer.mk@gmail.com" title="Mihail Kasadjikov <hamer.mk@gmail.com>"> Mihail Kasadjikov</a> <pre>So. I try to test kernel 3.15.10. I can't use 3.16 because of some issues related to reiserfs. I found that by default RC6 disabled for IronLake (gen 5). In file «drivers/gpu/drm/i915/intel_pm.c»: int intel_enable_rc6(const struct drm_device *dev) { … /* Disable RC6 on Ironlake */ if (INTEL_INFO(dev)->gen == 5) return 0; … } When I try to force enable_rc6 to 1 it still goes to default (disabled) value: $ cat /proc/cmdline root=/dev/mapper/h13ssd-root ro ipv6.disable=1 elevator=deadline no_console_suspend=1 pcie_aspm=powersave video=inteldrmfb:1280x800R-8 quiet intel_iommu=igfx_off resume=/dev/mapper/h13ssd-swap zswap.enabled=1 drm.debug=0x04 i915.enable_rc6=1 $ dmesg | egrep -i "rc6" [ 1.913863] [drm] Enabling RC6 states: RC6 off, RC6p off, RC6pp off And now I've got one error but without overall system hung. $ dmesg | egrep -i "hangcheck" [ 350.800043] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... bsd ring idle</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>