[Bug 94358] Display sleep mode causes session crash

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94358

--- Comment #4 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to Andreas Kloeckner from comment #3)
> I'm not really using Wayland though. I know that the X server said something
> about Wayland events, but I'm not sure where that came from.
> 
> Occasionally (but not every time) I get these messages as part of the crash,
> which does implicate the kernel:
> 
> Mar  2 08:52:01 bolt kernel: [  558.921225] [drm:intel_dp_start_link_train
> [i915]] *ERROR* failed to enable link training
> Mar  2 08:52:01 bolt kernel: [  558.923915]
> [drm:intel_dp_complete_link_train [i915]] *ERROR* failed to start channel
> equalization

That would only result in a black screen. If that is still happening with the
latest kernel, it is worth filing a separate bug for.

> This only seems to happen with my 4K monitor.
> 
> (and then all hell breaks loose:)
> Mar  2 08:52:01 bolt /usr/lib/gdm3/gdm-x-session[1909]: (II) systemd-logind:
> got pause for 13:87
> Mar  2 08:52:01 bolt /usr/lib/gdm3/gdm-x-session[1909]: (II) systemd-logind:
> got pause for 13:75
> Mar  2 08:52:01 bolt /usr/lib/gdm3/gdm-x-session[1909]: (II) systemd-logind:
> got pause for 13:88
> Mar  2 08:52:01 bolt /usr/lib/gdm3/gdm-x-session[1909]: (II) systemd-logind:
> got pause for 13:68
> Mar  2 08:52:01 bolt /usr/lib/gdm3/gdm-x-session[1909]: (II) systemd-logind:
> got pause for 13:67
> Mar  2 08:52:01 bolt gdm3: Child process -1136 was already dead.
> Mar  2 08:52:01 bolt systemd[1]: Stopping User Manager for UID 119...
> Mar  2 08:52:01 bolt systemd[1127]: Reached target Shutdown.

And

är 01 15:21:42 bolt /usr/lib/gdm3/gdm-x-session[1706]: (II) intel(0): switch
to mode 1920x1080 at 60.0 on eDP1 using pipe 0, position (0, 0), rotation normal,
reflection none
Mär 01 15:21:42 bolt /usr/lib/gdm3/gdm-x-session[1706]: (EE) intel(0): failed
to set mode: Permission denied [13]
Mär 01 15:21:44 bolt gnome-session-binary[2015]: WARNING: Application
'gnome-shell.desktop' killed by signal 11
Mär 01 15:21:44 bolt gnome-session[2015]: libGL error: failed to authenticate
magic 1
Mär 01 15:21:44 bolt gnome-session[2015]: libGL error: failed to load driver:
i965

tells me that logind tried to revoke the active display fd.

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