linux-kernel - Re: [REGRESSION][BISECTED] Screen goes blank with ASpeed AST2300 in 6.18-rc2

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Message-ID: <045e6362-01db-47f3-9a4f-8a86b2c15d00@googlemail.com>
Date: Fri, 24 Oct 2025 07:34:03 +0200
From: Peter Schneider <pschneider1968@...glemail.com>
To: Thomas Zimmermann <tzimmermann@...e.de>, regressions@...ts.linux.dev,
 LKML <linux-kernel@...r.kernel.org>
Cc: dri-devel@...ts.freedesktop.org, stable@...r.kernel.org,
 jfalempe@...hat.com, airlied@...hat.com, dianders@...omium.org,
 nbowler@...conx.ca, Linus Torvalds <torvalds@...ux-foundation.org>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Thorsten Leemhuis <regressions@...mhuis.info>
Subject: Re: [REGRESSION][BISECTED] Screen goes blank with ASpeed AST2300 in
 6.18-rc2

Hi Thomas,


Am 23.10.2025 um 21:11 schrieb Peter Schneider:
> Hi Thomas,
> 
> Am 23.10.2025 um 14:46 schrieb Thomas Zimmermann:
> [...]
>> I've been able to reproduce the problem with an AST2300 test system. The attached patch fixes the problem for me. Can 
>> you please test and report on the results?
> 
> Great! - this patch on top of 6.18-rc2 fixes the issue for me, too. Thanks very much for your effort!
> 
> Tested-by: Peter Schneider <pschneider1968@...glemail.com>

Meanwhile, I have also tested this against stable 6.12.55 and 6.17.5, where in -rc2, Greg dropped your original patch 
with upstream commit-id 6f719373b943a955fee6fc2012aed207b65e2854 before the final release because of my report.

So for both, I built them, made sure it worked ok. Then I did "git cherry-pick 6f719373b943a955fee6fc2012aed207b65e2854" 
and tested that it is broken again. Then I applied your last patch on top of it, and it worked fine, so with that the 
issue is fixed in both stable versions, too.

If you send a combined patch to Greg for stable, please feel free to add my

Tested-by: Peter Schneider <pschneider1968@...glemail.com>


Thanks again!

Beste Grüße,
Peter Schneider

-- 
Climb the mountain not to plant your flag, but to embrace the challenge,
enjoy the air and behold the view. Climb it so you can see the world,
not so the world can see you.                    -- David McCullough Jr.

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