[Bug 78890] [BDW Regression]igt/gem_ring_sync_copy fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78890

--- Comment #4 from Guo Jinxian <jinxianx.guo at intel.com> ---
Created attachment 100128
  --> https://bugs.freedesktop.org/attachment.cgi?id=100128&action=edit
dmesg

(In reply to comment #3)
> Just to confirm does disabling rc6 from the kernel commandline make the
> problem go away?
Add parameter "i915.i915_enable_rc6=0" in kernel commandline and run this test,
the result was passed.

Output:
./gem_ring_sync_copy
IGT-Version: 1.6-g532b7e6 (x86_64) (Linux:
3.15.0-rc7_drm-intel-nightly_d13557_20140529+ x86_64)
Subtest sync-render-blitter-write-read: SUCCESS
Subtest sync-render-blitter-read-write: SUCCESS
Subtest sync-render-blitter-write-write: SUCCESS
Subtest sync-blitter-render-write-read: SUCCESS
Subtest sync-blitter-render-read-write: SUCCESS
Subtest sync-blitter-render-write-write: SUCCESS

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