linux-kernel - Re: [Regression?] Linux 5.19-rc5 gets stuck on boot, not rc4

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Date:   Thu, 7 Jul 2022 10:22:19 +0200
From:   Thorsten Leemhuis <regressions@...mhuis.info>
To:     torvic9@...lbox.org, Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     "Limonciello, Mario" <Mario.Limonciello@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Jani Nikula <jani.nikula@...el.com>
Subject: Re: [Regression?] Linux 5.19-rc5 gets stuck on boot, not rc4

On 07.07.22 09:54, torvic9@...lbox.org wrote:
>> Linus Torvalds <torvalds@...ux-foundation.org> hat am 06.07.2022 18:59 GMT geschrieben:
>> On Wed, Jul 6, 2022 at 11:21 AM Thorsten Leemhuis
>> <regressions@...mhuis.info> wrote:
>>>
>>> Wild guess, I'm not involved at all in any of the following, I just
>>> noticed it and thought it might be worth mentioning:
>>>
>>> I heard Fedora rawhide added this patch to solve a boot problem that
>>> sounded similar to yours:
>>> https://patchwork.freedesktop.org/patch/489982/
>>
>> Yes, this looks likely, and matches that "starts in 5.19-rc5" since
>> the offending commit came in as
>>
>>   ee7a69aa38d8 ("fbdev: Disable sysfb device registration when
>> removing conflicting FBs")
>>
>> so that does look like a likely cause.
>>
> 
> I confirm that applying
>   "drm/aperture: Run fbdev removal before internal helpers"
> on top of rc5 solves this issue, computer boots normally again.
> I suppose this commit will be cherry-picked for rc6.

Thx for confirming. Yes, that patch is in the drm-misc-fixes tree as
bf43e4521ff3 and thus will likely be merged with this weeks DRM merge.

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)

P.S.: As the Linux kernel's regression tracker I deal with a lot of
reports and sometimes miss something important when writing mails like
this. If that's the case here, don't hesitate to tell me in a public
reply, it's in everyone's interest to set the public record straight.