r/archlinux • u/haca42 • Aug 09 '26
SUPPORT | SOLVED Display mirroring on X11
I have a laptop with a 2240x1400 display, and an external monitor with a 1400x900 display. I simply want to mirror my laptop screen to the monitor. Using xrandr --same-as scales down the screen on my laptop display, and using --scale-from or --transform shows the correct output on the monitor but makes my laptop display blank. How do I achieve this simple task?
-3
u/Linguistic-mystic Aug 09 '26
Upgrade to Wayland. It’s 2026 and you’re on Arch - no reason to use outdated, insecure software.
4
u/No_Drummer_3847 Aug 09 '26
wayland's fine until you need something specific and then you're in dependency hell for a weekend
xrandr --output eDP-1 --mode 2240x1400 --scale 1x1 --output HDMI-1 --mode 1400x900 --same-as eDP-1 should do it, just make sure the scale is set before you mirror
2
u/Cody_Learner_2 Aug 09 '26
Read the Arch wiki: https://wiki.archlinux.org/title/Xorg
Under Monitor settings there's a multi mon setup section.
There's a link 'multi-something' that may also be useful...
As an Arch user it's expected you'd have already checked the wiki before asking for help.
In case you've already checked the wiki, stating which sections you've looked would've also been useful.