linux-kernel - Re: [PATCH 1/1] Revert "fbdev: Disable sysfb device registration when removing conflicting FBs"

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Message-ID: <87cy7yef8f.fsf@minerva.mail-host-address-is-not-set>
Date: Wed, 10 Sep 2025 13:09:20 +0200
From: Javier Martinez Canillas <javierm@...hat.com>
To: Brett A C Sheffield <bacs@...recast.net>
Cc: stable@...r.kernel.org, regressions@...ts.linux.dev,
 linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org,
 dri-devel@...ts.freedesktop.org, Simona Vetter <simona@...ll.ch>, Helge
 Deller <deller@....de>, Thomas Zimmermann <tzimmermann@...e.de>, Lee Jones
 <lee@...nel.org>, Murad Masimov <m.masimov@...integration.ru>, Yongzhen
 Zhang <zhangyongzhen@...inos.cn>, Greg Kroah-Hartman
 <gregkh@...uxfoundation.org>, Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH 1/1] Revert "fbdev: Disable sysfb device registration
 when removing conflicting FBs"

Brett A C Sheffield <bacs@...recast.net> writes:

> On 2025-09-10 12:46, Javier Martinez Canillas wrote:
>> Brett A C Sheffield <bacs@...recast.net> writes:
>> 
>> Hello Brett,
>> 
>> > This reverts commit 13d28e0c79cbf69fc6f145767af66905586c1249.
>> >
>> > Commit ee7a69aa38d8 ("fbdev: Disable sysfb device registration when
>> > removing conflicting FBs") was backported to 5.15.y LTS. This causes a
>> > regression where all virtual consoles stop responding during boot at:
>> >
>> > "Populating /dev with existing devices through uevents ..."
>> >
>> > Reverting the commit fixes the regression.
>> >
>> > Signed-off-by: Brett A C Sheffield <bacs@...recast.net>
>> > ---
>> 
>> In the other email you said:
>> 
>> > Newer stable kernels with this
>> > patch (6.1.y, 6.6.y, 6.12,y, 6.15.y, 6.16.y) and mainline are unaffected.
>> 
>> But are you proposing to revert the mentioned commit in mainline too
>> or just in the 5.15.y LTS tree ?
>
> Only the 5.15.y tree. Sorry - that could have been clearer.  There's no
> regression anywhere else. Mainline and other stable kernels are all ok.
>

That's what I thought but just wanted to confirm that was the case. Thanks!

> Cheers,
>
>
> Brett
>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat