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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Mon, 24 Feb 2020 12:18:03 -0800
Message-ID: <CAHk-=wh101Kcdby3UwzGWcCVELdGJoyduQ7Hwp2B6tavzx8ULw@mail.gmail.com>
Subject: Re: i915 GPU-hang regression in v5.6-rcx
To:     =?UTF-8?Q?J=C3=B6rg_Otte?= <jrg.otte@gmail.com>,
        Jani Nikula <jani.nikula@linux.intel.com>,
        Chris Wilson <chris@chris-wilson.co.uk>,
        =?UTF-8?B?VmlsbGUgU3lyasOkbMOk?= <ville.syrjala@linux.intel.com>,
        Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc:     Dave Airlie <airlied@gmail.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        intel-gfx@lists.freedesktop.org
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Let's add in some of the i915 people and list.

Everything quoted below for the new participants.

              Linus

On Mon, Feb 24, 2020 at 2:52 AM J=C3=B6rg Otte <jrg.otte@gmail.com> wrote:
>
> In v5.6-rcx I sporadically see a hanging GPU.
>
> [  640.919302] i915 0000:00:02.0: Resetting chip for stopped heartbeat on=
 rcs0
> [  641.021808] i915 0000:00:02.0: Xorg[722] context reset due to GPU hang
>
> [ 2229.764709] i915 0000:00:02.0: Resetting chip for stopped heartbeat on=
 rcs0
> [ 2229.867534] i915 0000:00:02.0: kwin_x11[1005] context reset due to GPU=
 hang
>
> To recover Xorg must be killed and restarted or reboot is required.
> I've never seen this before v5.6-rcx.
>
> Best way to reproduce seem to be "heavily scrolling with the mouse wheel"
> in graphic applications. I also saw this once while video streaming in
> a browser.
>
>
> System:  Host: fichte Kernel: 5.6.0-rc1 x86_64 bits: 64 Console: tty 3
> Distro: Ubuntu 18.04.3 LTS
> Machine: Device: Notebook System: FUJITSU product: LIFEBOOK A544
> serial: <filter>
>          Mobo: FUJITSU model: FJNBB35 serial: <filter>
>          BIOS: FUJITSU // Phoenix v: Version 1.17 rv 1.17 date: 05/09/201=
4
> CPU:     Dual core Intel Core i5-4200M (-MT-MCP-) cache: 3072 KB
>          clock speeds: max: 3100 MHz 1: 1127 MHz 2: 964 MHz 3: 1034
> MHz 4: 984 MHz
> Graphics:Card: Intel 4th Gen Core Processor Integrated Graphics Controlle=
r
>          Display Server: X.Org 1.19.6 drivers: modesetting (unloaded:
> fbdev,vesa) Resolution: 1366x768@60.00hz
>          OpenGL: renderer: Mesa DRI Intel Haswell Mobile version: 4.5
> Mesa 19.2.8
>
>
> Thanks, J=C3=B6rg