Dear Purism Community
I bought a Librem Mini 2 with Pureboot bundle to use as media center. Unfortunately, it doesn’t work as expected. On Wayland I had to use a small display to be able to see any output during boot. E.g. when having to enter the pin for Pureboot. After boot, I was able to connect the 4k TV, however everything lagged. Even the mouse was really slow, not to mention playing any movies.
Disabling Wayland and switching to XServer, solved the boot problem somewhat. With the 4k TV connected, I can now see output during boot and I’m now able to enter the pin for Pureboot. However, at 4k resolution, I only get a maximum refresh rate of 30Hz:
$ xrandr Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384 DP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 1600mm x 900mm 4096x2160 30.00 25.00 24.00 29.97 23.98 3840x2160 30.00 25.00 24.00 29.97 23.98 1920x1080 120.00* 100.00 119.88 60.00 50.00 59.94 30.00 25.00 24.00 29.97 23.98 1920x1080i 60.00 50.00 59.94 1280x1024 60.02 1360x768 60.02 1280x720 60.00 50.00 59.94 1024x768 60.00 800x600 60.32 720x576 50.00 720x480 60.00 59.94 640x480 60.00 59.94 720x400 70.08 HDMI-1 disconnected (normal left inverted right x axis y axis) DP-2 disconnected (normal left inverted right x axis y axis) DP-3 disconnected (normal left inverted right x axis y axis) HDMI-2 disconnected (normal left inverted right x axis y axis)
I just bought a high-end cable (DP -> HDMI), so I doubt that the cable is the issue. I also tried the HDMI output. Same results. The TV is a fairly new LG OLED TV which I have tested with several devices with 4k output.
It seems that this is a firmware issue. As the Intel UHD Graphics 620 should support 4k@60Hz. Also, other users seem to have a working setup . However, maybe they don’t use Pureboot?
Any thoughts, hints, or workarounds? I don’t have a use for the device other than use it as media center…