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

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Message-ID: <aMFYeV4UdD7NnrSC@karahi.gladserv.com>
Date: Wed, 10 Sep 2025 12:52:41 +0200
From: Brett A C Sheffield <bacs@...recast.net>
To: Javier Martinez Canillas <javierm@...hat.com>
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"

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.

Cheers,


Brett