[Bug 75244] [BYT Regression]igt/gem_concurrent_blit/gtt-gpu-read-after-write-forked causes *ERROR* timed out waiting for Punit

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75244

--- Comment #18 from lu hua <huax.lu at intel.com> ---
Created attachment 102414
  --> https://bugs.freedesktop.org/attachment.cgi?id=102414&action=edit
dmesg(disable RC6)

(In reply to comment #17)
> Can you try the same test case with RC6 disabled?

Disable RC6, this error goes away.
It reports error "<3>[  218.281683] [drm:vlv_force_gfx_clock] *ERROR* timeout
waiting for GFX clock force-off (00000008)"

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