[Intel-gfx] [bug report] drm/i915: Computer does not shutdown,

[Ville Syrjälä]

On Mon, Mar 22, 2021 at 04:51:26PM +0100, Hans de Goede wrote:
> Hi,
> 
> On 3/22/21 3:53 PM, Ville Syrjälä wrote:
> > On Mon, Mar 22, 2021 at 11:45:39AM +0100, Hans de Goede wrote:
> >> Hi,
> >>
> >> On 3/14/21 11:30 AM, Mario Hüttel wrote:
> >>> Hello,
> >>>
> >>> It seems, like the mailing list, didn't accept my email. So I'll send
> >>> it again:
> >>>
> >>> I want to report a bug. I have a PC with Intel i7-6700K processor (with
> >>> integrated graphics) and an AsRock Fatal1ty Z170 Gaming K6 mainboard. I
> >>> use the CPU's integrated graphics.
> >>> My system is Archlinux with Kernel v5.11.6.
> >>>
> >>> Using this setup, my PC works normally. However, when I shut it down,
> >>> the power is not cut. Fans keep spinning and LEDs stay on. I couldn't
> >>> detect any other problem when shutting down. Drives etc. stop as
> >>> expected and the video is blank. Even after waiting several hours, the
> >>> system doesn't power down.
> >>>
> >>> Restarts work normally.
> >>>
> >>> I haven't yet found any other people on the internet that have the same
> >>> bug.
> >>>
> >>> I used git bisect to find the commit that causes this behavior on my
> >>> machine.
> >>
> >> Thank you for doing a bisect that is always very helpful.
> >>
> >>> The result is: fe0f1e3bfdfeb53e18f1206aea4f40b9bd1f291c is the
> >>> first bad commit.
> >>
> >> To save others the trouble of having to look up the hasj, that is:
> >>
> >> "drm/i915: Shut down displays gracefully on reboot"
> >>
> >> Which is the same commit as which I've reported is causing issues
> >> with DSI panels not lighting up on reboots on some BYT/CHT devices.
> >>
> >> Since this seems to mostly be intended to fix issues surrounding
> >> DP MST stuff, maybe the graceful shutdown should only be done when
> >> MST is in use?
> > 
> > No. It also fixes Windows, lols.
> 
> Ok, can you at least take a look at my patch which fixes (works-around)
> the issues for DSI panel on BYT/CHT DSI devices:
> 
> https://patchwork.freedesktop.org/patch/422481/
> 
> ?

Never reached my inbox.

> 
> In that case the display stays black after reboot in the BIOS / in apps
> using the EFI fb/console such as the grub menu and when using fastboot
> it also stays black under Linux (I did not test Windows) only after forcing
> a modeset under Linux the DSI LCD panel works again.
> 
> As I mention in the commit msg given the age of the platforms involved
> I think that a simple workaround as I suggest there is best.
> 
> Regards,
> 
> Hans

-- 
Ville Syrjälä
Intel