Control: tags -1 + moreinfo On Wed, 28 Mar 2018 at 19:22:41 +0200, geodeb wrote: > until gnome 3.26 it was correctly detected. now it works > only on full hd resolution. higher resolutions cause the blackout of both the > displays and the only way out is to power off.
This is not a bug in gnome-control-center: that component only changes configuration, and isn't responsible for the actual modesetting. I'd reassign it to another package, but I don't yet know which package would be most appropriate (candidates include gnome-shell, libmutter-2-0, libdrm* and the Linux kernel). The package information from "reportbug --template libglx-mesa0" and "reportbug --template gnome-shell" would be very useful information: that would tell us about your gnome-shell, mutter and graphics driver versions. What graphics hardware does this machine have? (NVIDIA? AMD? Intel?) Please look in /var/log/syslog for log messages from gnome-shell shortly before the power-off. I would guess that you might see something similar to the logs quoted on these upstream bug reports: https://gitlab.gnome.org/GNOME/gnome-shell/issues/153 https://gitlab.gnome.org/GNOME/mutter/issues/93 https://gitlab.gnome.org/GNOME/mutter/issues/81 When the system is in this state (with both displays blank), does it still respond to network connections (ping, ssh)? If you have a Caps Lock, Num Lock or Scroll Lock LED on your keyboard, does pressing those keys still toggle the appropriate LED? If you type Ctrl+Alt+F6, do you see a text-mode login prompt? If not, if you type Ctrl+Alt+F6 (even if it has no visible effect) followed by Ctrl+Alt+Del, does the machine reboot? If it does, what do you see while it's rebooting? Thanks, smcv
