[Bug 78891] [BDW Regression]igt/gem_seqno_wrap fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78891

--- Comment #4 from Guo Jinxian <jinxianx.guo at intel.com> ---
Created attachment 99460
  --> https://bugs.freedesktop.org/attachment.cgi?id=99460&action=edit
dmesg

(In reply to comment #3)
> (In reply to comment #2)
> > This is due to rendercopy failing straight from init. And gem_seqno_wrap
> > is leaning on that. So i expect gem_render_copy to fail also.
> > 
> > I noticed that if I force gpu to reset itself, then after successful reset
> > the rendercopy works as expected.
> 
> Please test gem_render_copy after this gem_seqno_wrap failing.
> 
> The gpu reset doesn't always fix the situation. It seems that PDPs get left
> sometimes to zero after init/reset.

[root at x-bdw09 tests]# ./gem_seqno_wrap
IGT-Version: 1.6-g737d248 (x86_64) (Linux:
3.15.0-rc3_drm-intel-nightly_0791a3_20140520+ x86_64)
Test assertion failure function cmp_bo, file gem_seqno_wrap.c:115:
Last errno: 0, Success
Failed assertion: *vaddr++ == val
1: 0xfffffffc differs from assumed 0x0
seqno_before_test 0x1,  approximated seqno on test fail 0x1
[root at x-bdw09 tests]# ./gem_render_copy
IGT-Version: 1.6-g737d248 (x86_64) (Linux:
3.15.0-rc3_drm-intel-nightly_0791a3_20140520+ x86_64)
Test assertion failure function scratch_buf_check, file gem_render_copy.c:117:
Last errno: 0, Success
Failed assertion: val == color
Expected 0xffff00ff, found 0xfff0ff00 at (502,502)
[root at x-bdw09 tests]# cat /proc/cmdline

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