Arch Linux

BushMan_01

Member

Registered: 2019-06-30

Posts: 14

Issue with external monitor

Hello,

I have been having trouble with an external MSI monitor connected over a Thunderbolt to DisplayPort cable. X sometimes (indeed, often) does not detect the refresh rate (170Hz) and defaults to 60FPS. Weirdly, the resolution (1440p) is fine.

The monitor worked (mostly) fine on Hyprland, and sometimes it works fine on X11 too, but if the refresh rate is not detected immediately, the problems can't be fixed without restarting X (multiple times in a row, sometimes losing the monitor's connection completely at the console, to never be recovered), whereas with Wayland I could unplug it and plug it back in a couple of times and it would usually work. Sometimes X locks up completely on a black screen, necessitating a reboot.

I have tried adding the following to my .xinitrc to no avail (testing the commands manually, they return "xrandr: Configure crtc 1 failed"):

# xrandr --newmode "2560x1440_170.02"  666.3  2560 2568 2600 2666  1440 1443 1448 1470  +hsync -vsync && xrandr --addmode DP-1 2560x1440_170.02 && xrandr --output DP-1 --mode 2560x1440_170.02 &

(I got the modeline by running "xrandr --current --verbose" when the monitor was working properly.)

Please help me to fix my problem, or direct me to someone knowledgeable enough to help.

Thanks.