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References: <20220403132322.51c90903@darkstar.example.org> <CADnq5_M+M_iykM0Ag6RF+kxzgpEopUBtp82h7tRM3G+B3AWZ2w@mail.gmail.com>
 <20220404213940.09a56d15@darkstar.example.org> <CADnq5_PhaFbVCb=-AUCx4L-sCyPCPOsY3tNpiAg=gfCN7hFcJA@mail.gmail.com>
 <20220409182831.185e5d92@darkstar.example.org>
In-Reply-To: <20220409182831.185e5d92@darkstar.example.org>
From:   Alex Deucher <alexdeucher@gmail.com>
Date:   Mon, 11 Apr 2022 14:34:37 -0400
Message-ID: <CADnq5_MvGGONvAvhwgokDxRpTbnsGEFROcgsZteJby9Bya81Nw@mail.gmail.com>
Subject: Re: AMDGPU: regression on 5.17.1
To:     Michele Ballabio <ballabio.m@gmail.com>
Cc:     LKML <linux-kernel@vger.kernel.org>, regressions@lists.linux.dev,
        Maling list - DRI developers 
        <dri-devel@lists.freedesktop.org>,
        amd-gfx list <amd-gfx@lists.freedesktop.org>
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On Sat, Apr 9, 2022 at 12:28 PM Michele Ballabio <ballabio.m@gmail.com> wrote:
>
> On Tue, 5 Apr 2022 10:23:16 -0400
> Alex Deucher <alexdeucher@gmail.com> wrote:
>
> > On Mon, Apr 4, 2022 at 3:39 PM Michele Ballabio
> > <ballabio.m@gmail.com> wrote:
> > >
> > > On Mon, 4 Apr 2022 13:03:41 -0400
> > > Alex Deucher <alexdeucher@gmail.com> wrote:
> > >
> > > > On Sun, Apr 3, 2022 at 10:19 AM Michele Ballabio
> > > > <ballabio.m@gmail.com> wrote:
> > > > >
> > > > > Hi,
> > > > >         I've hit a regression on 5.17.1 (haven't tested 5.17.0,
> > > > > but 5.16-stable didn't have this problem).
> > > > >
> > > > > The machine is a Ryzen 5 1600 with AMD graphics (RX 560).
> > > > >
> > > > > The regression I hit seems to trigger when the machine is left
> > > > > idle at boot (I don't boot straight to X, I boot to a tty, login
> > > > > and then start X). The machine after a while blanks the screen.
> > > > > Usually, the screen unblanks as the keyboard is hit or the mouse
> > > > > moves, but with kernel 5.17.1 the screen does not wake up. The
> > > > > machine seems to run mostly fine: I can login from ssh, but I
> > > > > cannot reboot or halt it: a sysrq sequence is needed for that.
> > > > > Note that if the screen goes blank under X, it wakes up fine.
> > > > >
> > > > > Below a dmesg and two traces from syslog (they're quite
> > > > > similar).
> > > >
> > > > Can you bisect?  Does setting amdgpu.runpm=0 help?
> > >
> > > I can try to bisect, should I narrow the search to drivers/gpu/drm/
> > > ?
> >
> > I would just do a full bisect if possible in case the change happens
> > to be outside of drm.
> >
> > >
> > > Setting amdgpu.runpm=0 works, the display now unblanks without
> > > problems.
> >
>
> Hi,
>     I bisected this, and the first bad commit is
> [087451f372bf76d971184caa258807b7c35aac8f] drm/amdgpu: use generic fb
> helpers instead of setting up AMD own's.
>
> Let me know if you need some more testing.

Thanks.  Do the attached patches fix the issue?

Thanks,

Alex

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