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

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Message-ID: <aMFak8Oj-UoCrgBH@laps>
Date: Wed, 10 Sep 2025 07:01:39 -0400
From: Sasha Levin <sashal@...nel.org>
To: Brett A C Sheffield <bacs@...recast.net>
Cc: Javier Martinez Canillas <javierm@...hat.com>, 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>
Subject: Re: [PATCH 1/1] Revert "fbdev: Disable sysfb device registration
 when removing conflicting FBs"

On Wed, Sep 10, 2025 at 12:52:41PM +0200, Brett A C Sheffield wrote:
>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.

Thanks for investigating this! I'll queue it up for 5.15.

-- 
Thanks,
Sasha