Librem 15 v4 - 3440x1440 30hz (ultrawide)

Hardware
1

I noticed that the Librem 15 v4 has a max resolution of 3840x2160 @ 30hz. I have an ultrawide monitor (3440x1440) and am having a lot of trouble setting it up.

For one, the option was unavailable by default.

I am using xrandr to set it up, see commands

`gtf 3440 1440 30`
`xrandr --newmode "3440x1440_30.00"  196.90  3440 3600 3960 4480  1440 1441 1444 1465  -HSync +Vsync`
`xrandr --addmode XWAYLAND3 3440x1440_30.00`
`xrandr --output XWAYLAND3 --mode 3440x1440_30.00`

The following error occurs:
xrandr: Configure crtc 1 failed

I have also tried 3440x1440 @ 24hz.

2

are you running x or wayland ? that might be part of the problem …

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3

… and to take a further step back … what distro is in use? PureOS or something else?

4

I was trying to stick with PureOS, which appears to use Wayland.

5

Can you try choosing X at the login screen?

6

Yes, X is probably a better bet here. I never managed to add custom modes for wayland (when it was still needed for 4k).

You’ll also want to upgrade the coreboot to the latest version if you didn’t yet.

7

I ended up getting it working by running this script at startup and using X or Cinnamon. Can’t put out 60 fps so has to be 30.

xrandr --newmode "3440x1440_30.00"  196.25  3440 3600 3952 4464  1440 1443 1453 1468 -hsync +vsync
xrandr --addmode HDMI-1 "3440x1440_30.00"
xrandr --output HDMI-1 --mode 3440x1440_30.00
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