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

[Ville Syrjälä]

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.

-- 
Ville Syrjälä
Intel