On Sun, Nov 03, 2019 at 12:50:07AM +0100, Klemens Nanni wrote: > My workstation consists of a X230 with docking station featuring two > DisplayPort as well as two DVI-D connectors. I used to use one external > monitor over DVI-D with a resolution of 2560x1440 next to the internal > 1366x768 LVDS monitor just fine; while docked, suspend and resume works > and X keeps its screen configured without problems. > > Now I set up an new external 3840x2160 (UHD) monitor to be used alone > with the internal one being turned off while docked. This in itself > works: due to hardware limitations, 4K over a single link is not > possible, so the external monitor exports two logical monitors of > 1920x2160 each which eventually plug into both DisplayPort connectors. > > With xrandr(1) all expected modelines appear and I can configure the > setup: > > xrandr --output LVDS-1 --off \ > --output DP-2 --mode 1920x2160 --pos 1920x0 --rotate normal \ > --output DP-3 --mode 1920x2160 --pos 0x0 --rotate normal > > The problem that now occurs is that whenever I suspend to RAM and resume, > xenodm will simply restart. On the internal monitor which was turned > off, TTY output is observed immediately upon resume until the xenodm > login prompt appears on it - both external monitors stay blank.
Hi, If xenodm restarts, it means that the X server crashed (or decided to terminate itself for some reason...). Please look at /var/log/Xorg.0.log.old for any error messages. -- Matthieu Herrb
