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

From	Bjørn Mork <bjorn@mork.no>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#914495: linux-image-4.18.0-3-amd64: does not boot here
Date	2018-12-06 19:40 +0100
Message-ID	<x26J3-1Sl-7@gated-at.bofh.it> (permalink)
References	(5 earlier) <x1ez0-3fl-3@gated-at.bofh.it> <wXrl8-68t-29@gated-at.bofh.it> <x26J3-1Sl-9@gated-at.bofh.it> <wXrl8-68t-29@gated-at.bofh.it> <x26J3-1Sl-9@gated-at.bofh.it>
Organization	m

Cross-posted to 2 groups.

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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

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Bug#914495: linux-image-4.18.0-3-amd64: does not boot here TS <debts@xk2c.de> - 2018-12-03 23:20 +0100
  Bug#914495: linux-image-4.18.0-3-amd64: does not boot here Ben Hutchings <ben@decadent.org.uk> - 2018-12-04 01:20 +0100
  Bug#914495: linux-image-4.18.0-3-amd64: does not boot here Bjørn Mork <bjorn@mork.no> - 2018-12-04 09:50 +0100
    Bug#914495: linux-image-4.18.0-3-amd64: does not boot here TS <debts@xk2c.de> - 2018-12-05 06:10 +0100
      Bug#914495: linux-image-4.18.0-3-amd64: does not boot here TS <debts@xk2c.de> - 2018-12-05 07:00 +0100
        Bug#914495: linux-image-4.18.0-3-amd64: does not boot here Norbert Brondeau <norbert.brondeau@free.fr> - 2018-12-06 18:20 +0100
          Bug#914495: linux-image-4.18.0-3-amd64: does not boot here Norbert Brondeau <norbert.brondeau@free.fr> - 2018-12-08 16:50 +0100
            Bug#914495: linux-image-4.18.0-3-amd64: does not boot here Phil <elektron@halo.nu> - 2018-12-08 20:30 +0100
  Bug#914495: linux-image-4.18.0-3-amd64: does not boot here Bjørn Mork <bjorn@mork.no> - 2018-12-06 19:40 +0100

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