[Bug 106342] [drm] HANG: ecode 9:0:0x9cba0f27, in kscreenlocker_g [103585], reason: Hang on rcs0, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106342

--- Comment #39 from Lionel Landwerlin <lionel.g.landwerlin at linux.intel.com> ---
(In reply to Thiago Macieira from comment #38)
> (In reply to Lakshmi from comment #37)
> > I assume this is a mesa bug, so changing the product changing the product to
> > Mesa.
> 
> Considering it's a GPU hang, why do you assume it's a Mesa bug?

The last 4 error states you added indicate that most of the units of the 3d
engine are not busy.

ACTHD does not seem to point to a location in the batch.

IPEHR is fairly weird too (last executed instruction):
 0x9e79016f (WTH is this?)
 0x710cdef8 (Still unknown...)
 0x70004000 (MEDIA_VFE_STATE, used for compute, but not present in the batch)

Also INSTDONE is bonkers :

  INSTDONE: 0xffdffffe
    PRB0 Ring Enable: false
    CS Done: false

  INSTDONE: 0xffd7fffe
    PRB0 Ring Enable: false
    GAM Done: false
    CS Done: false

Usually Ring Enable is true.

Does that look more like something that happens with display hangs?

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