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Date:   Mon, 9 Oct 2023 15:45:44 +0700
From:   Bagas Sanjaya <bagasdotme@gmail.com>
To:     Huacai Chen <chenhuacai@kernel.org>,
        Linux Regressions <regressions@lists.linux.dev>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Cc:     Jaak Ristioja <jaak@ristioja.ee>,
        Javier Martinez Canillas <javierm@redhat.com>,
        Linux DRI Development <dri-devel@lists.freedesktop.org>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Thomas Zimmermann <tzimmermann@suse.de>
Subject: Re: Blank screen on boot of Linux 6.5 and later on Lenovo ThinkPad
 L570
Message-ID: <ZSO9uArAtsPMPeTP@debian.me>
References: <7c50e051-eba2-09fc-da9f-023d592de457@ristioja.ee>
 <31bdf7b1-0ed9-4217-b459-1d857e53120b@leemhuis.info>
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On Mon, Oct 09, 2023 at 09:27:02AM +0800, Huacai Chen wrote:
> Hi, all,
>=20
> On Tue, Sep 26, 2023 at 10:31=E2=80=AFPM Huacai Chen <chenhuacai@kernel.o=
rg> wrote:
> >
> > Hi, all,
> >
> > On Tue, Sep 26, 2023 at 7:15=E2=80=AFPM Linux regression tracking (Thor=
sten
> > Leemhuis) <regressions@leemhuis.info> wrote:
> > >
> > > [CCing the regression list, as it should be in the loop for regressio=
ns:
> > > https://docs.kernel.org/admin-guide/reporting-regressions.html]
> > >
> > > Hi, Thorsten here, the Linux kernel's regression tracker.
> > >
> > > On 13.09.23 14:02, Jaak Ristioja wrote:
> > > >
> > > > Upgrading to Linux 6.5 on a Lenovo ThinkPad L570 (Integrated Intel =
HD
> > > > Graphics 620 (rev 02), Intel(R) Core(TM) i7-7500U) results in a bla=
nk
> > > > screen after boot until the display manager starts... if it does st=
art
> > > > at all. Using the nomodeset kernel parameter seems to be a workarou=
nd.
> > > >
> > > > I've bisected this to commit 60aebc9559492cea6a9625f514a8041717e3a2=
e4
> > > > ("drivers/firmware: Move sysfb_init() from device_initcall to
> > > > subsys_initcall_sync").
> > >
> > > Hmmm, no reaction since it was posted a while ago, unless I'm missing
> > > something.
> > >
> > > Huacai Chen, did you maybe miss this report? The problem is apparently
> > > caused by a commit of yours (that Javier applied), you hence should l=
ook
> > > into this.
> > I'm sorry but it looks very strange, could you please share your config=
 file?
> As confirmed by Jaak, disabling DRM_SIMPLEDRM makes things work fine
> again. So I guess the reason:

Did Jaak reply privately? It should have been disclosed in public
ML here instead.

>=20
> When SIMPLEDRM takes over the framebuffer, the screen is blank (don't
> know why). And before 60aebc9559492cea6a9625f ("drivers/firmware: Move
> sysfb_init() from device_initcall to subsys_initcall_sync") there is
> no platform device created for SIMPLEDRM at early stage, so it seems
> also "no problem".

I don't understand above. You mean that after that commit the platform
device is also none, right?

Confused...

--=20
An old man doll... just what I always wanted! - Clara

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