Bug#894306: external monitor resolution higher than 1920x1080 freezes rendering

[Simon McVittie]

Control: reassign 894306 libmutter-2-0
Control: retitle 894306 external monitor resolution higher than 1920x1080 freezes rendering
Control: forwarded 894306 https://gitlab.gnome.org/GNOME/mutter/issues/81
Control: affects 894306 + gnome-shell gnome-control-center

On Mon, 02 Apr 2018 at 11:10:10 -0400, toddjsnider at gmail.com wrote:
> Similar to the linked bug reports, my syslog is littered with the
> following message:
> Apr  2 10:00:29 todd-debian gnome-shell[1007]: Failed to set CRTC mode
> 3840x2160: Invalid argument
> 
> When the display lockup occurs, the machine still responds to pings and
> the caps lock LED toggles with button presses (my keyboard doesn't have
> scroll lock or number lock LEDs.)  However, pressing Ctrl+Alt+F6 has no
>  visible effect, nor does pressing Ctrl+Alt+Del afterward.

That sounds like <https://gitlab.gnome.org/GNOME/mutter/issues/81> which
is thought to have been avoided in libmutter-2-0 3.28.1 (by turning
"modifiers" into a hidden experimental feature that is off by default,
with the intention of fixing and re-enabling them in 3.29.x). Please
could you try with libmutter-2-0 3.28.1 or later?

Thanks,
    smcv