[Bug 88012] [bisected BYT] complete freeze after: drm/i915/vlv: WA for Turbo and RC6 to work together

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Nov 2 11:01:12 PST 2015


https://bugs.freedesktop.org/show_bug.cgi?id=88012

--- Comment #102 from John <jbmacbrodie at yahoo.com> ---
Given Luka Karinja's results, I checked my kernel args to see if something else
could account for my results.  I found - i915.i915_enable_rc6=1
i915.lvds_downclock=1 i915.semaphores=1 i915.i915_enable_fbc=1.

rc6=1 seems to be known to add instability, perhaps the freq cap offset that. 
I've stripped the args (except boot, splash, quiet) will be running new tests.

Kernel args I've been using the last few weeks on T100CHI.

boot=pci,force acpi=force rcutree.rcu_idle_gp_delay=1 libahci.ignore_sss=1
splash quiet acpi_enforce_resources=lax i915.i915_enable_rc6=1
i915.lvds_downclock=1 i915.semaphores=1 i915.i915_enable_fbc=1
drm.vblankoffdelay=1 pcie_aspm=force acpi=force rcutree.rcu_idle_gp_delay=1
libahci.ignore_sss=1 splash quiet acpi_enforce_resources=lax
drm.vblankoffdelay=1 pcie_aspm=force

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