1

i have a PIR on another raspberry pi. This one should turn the monitor on this ubuntu via SSH on and off.

My System: Raspberry Pi 4 with Ubuntu 2104

I read about this and found many answers about using xset ( xset -display:0.0 dpms force off ), but the xset doesnt work ( Server does not have the DPMS Extension ). I tried to use the ubuntu screen off and use of xdotool to move the mouse to enable the monitor - xdotool also is not working. Now i found that ubuntu now use wayland and x tools are not working. For turning monitor on/off, i found that the new tool could be wlr-randr, but i get: compositor doesn't support wlr-output-management-unstable-v1. With mousemove i used wtype, but get the same error message.

What could I do to turn monitor on/off in ubuntu 2104 with xwayland via SSH?

Regards David

Dave
  • 39
  • Have you tried the xrandr method suggested at https://askubuntu.com/a/154052/526300 ? – SHawarden May 24 '21 at 21:54
  • yes i tried this also, the error of xrandr --output XWAYLAND0 --off is:

    X Error of failed request: BadMatch (invalid parameter attributes) Major opcode of failed request: 139 (RANDR) Minor opcode of failed request: 7 (RRSetScreenSize) Serial number of failed request: 20 Current serial number in output stream: 22

    so i found the alternativ wlr-randr, which is not working

     – Dave May 25 '21 at 19:15
  • Did you try https://unix.stackexchange.com/a/618554/140671 ? – SHawarden May 26 '21 at 21:42
  • Thank you for your comment. Yes i tried wlr-randr and get: compositor doesn't support wlr-output-management-unstable-v1, with swaymsg i get: 00:00:00.077 [swaymsg/main.c:417] Unable to retrieve socket path – Dave May 28 '21 at 18:52

0 Answers0