linux-kernel - Re: Blank screen on boot of Linux 6.5 and later on Lenovo ThinkPad L570

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Date:   Wed, 25 Oct 2023 15:29:24 +0200
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Huacai Chen <chenhuacai@...nel.org>,
        Thorsten Leemhuis <regressions@...mhuis.info>
Cc:     Evan Preston <x.arch@...eston.net>,
        Linux regressions mailing list <regressions@...ts.linux.dev>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Jaak Ristioja <jaak@...tioja.ee>,
        Linux DRI Development <dri-devel@...ts.freedesktop.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Bagas Sanjaya <bagasdotme@...il.com>
Subject: Re: Blank screen on boot of Linux 6.5 and later on Lenovo ThinkPad
 L570

Huacai Chen <chenhuacai@...nel.org> writes:

Hello,

> On Wed, Oct 25, 2023 at 6:08 PM Thorsten Leemhuis
> <regressions@...mhuis.info> wrote:

[...]

>>
>> This additional report makes me wonder if we should revert the culprit
>> (60aebc9559492c ("drivers/firmware: Move sysfb_init() from
>> device_initcall to subsys_initcall_sync") [v6.5-rc1]). But I guess that
>> might lead to regressions for some users? But the patch description says
>> that this is not a common configuration, so can we maybe get away with that?
> From my point of view, this is not a regression, 60aebc9559492c
> doesn't cause a problem, but exposes a problem. So we need to fix the
> real problem (SIMPLEDRM has a blank screen on some conditions). This
> needs Jaak or Evan's help.
>

I agree with this.

> Huacai

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat