Bug#914495: linux-image-4.18.0-3-amd64: does not boot here

[Bjørn Mork <bjorn@mork.no>]

Bjørn Mork <bjorn@mork.no> writes:
> Given this, there is an extremely suspicious commit added in v4.18.20: 
>
>  06e562e7f515 ("drm/i915/ringbuffer: Delay after EMIT_INVALIDATE for gen4/gen5")
>
> I do have an old laptop with an affected chipset generation, and
> verified that it had the same symptoms.  But never got the time to
> actually test any further.  Still, I do think that there is good reason
> to simply try a revert of that commit.

FWIW, I have now verified that reverting commit 06e562e7f515
("drm/i915/ringbuffer: Delay after EMIT_INVALIDATE for gen4/gen5") fixes
this issue for me.



Bjørn