linux-kernel - Re: [Intel-gfx] alderlake crashes (random memory corruption?) with 6.0 i915 / ucode related

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Message-ID: <717fb4ab-5225-884f-37f9-2032c265824e@redhat.com>
Date:   Mon, 17 Oct 2022 12:48:59 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Jani Nikula <jani.nikula@...ux.intel.com>,
        intel-gfx <intel-gfx@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Thorsten Leemhuis (regressions address)" <regressions@...mhuis.info>
Subject: Re: [Intel-gfx] alderlake crashes (random memory corruption?) with
 6.0 i915 / ucode related

Hi,

On 10/17/22 10:39, Jani Nikula wrote:
> On Mon, 17 Oct 2022, Jani Nikula <jani.nikula@...ux.intel.com> wrote:
>> On Thu, 13 Oct 2022, Hans de Goede <hdegoede@...hat.com> wrote:
>>> With 6.0 the following WARN triggers:
>>> drivers/gpu/drm/i915/display/intel_bios.c:477:
>>>
>>>         drm_WARN(&i915->drm, min_size == 0,
>>>                  "Block %d min_size is zero\n", section_id);
>>
>> What's the value of section_id that gets printed?
> 
> I'm guessing this is [1] fixed by commit d3a7051841f0 ("drm/i915/bios:
> Use hardcoded fp_timing size for generating LFP data pointers") in
> v6.1-rc1.
> 
> I don't think this is the root cause for your issues, but I wonder if
> you could try v6.1-rc1 or drm-tip and see if we've fixed the other stuff
> already too?

6.1-rc1 indeed does not trigger the drm_WARN and for now (couple of
reboots, running for 5 minutes now) it seems stable. 6.0.0 usually
crashed during boot (but not always).

Do you think it would be worthwhile to try 6.0.0 with d3a7051841f0 ?

Any other commits which I can try before I go down the bisect route ?

(I'm assuming this will also affect other users, so we really need
to fix this for 6.0.x before it starts hitting Arch + Fedora users)

Regards,

Hans



> [1] https://gitlab.freedesktop.org/drm/intel/-/issues/6592