I am trying to configure my new laptop with Ubuntu 18.04 (HP Spectre X360 late 2018 version). In particular, I would like to have per-monitor HiDPI scaling for my 4k laptop screen and my ultra-wide, non-HiDPI external monitor.
I was following this guide https://wiki.archlinux.org/index.php/HiDPI#Side_display , that suggests to use xrandr for this purpose. However, when I run the suggested command, I get an error:
xrandr --output eDP-1 --auto --output DP-1 --auto --scale 2x2 --right-of eDP-1
xrandr: screen cannot be larger than 8192x8192 (desired size 10720x2880)
Fair enough, let's change that. I then discovered that to do that I need to change the virtual screen setting in my xorg.conf, as specified here xrandr: screen cannot be larger than 1680x1680 (desired size 3360x1050) .
However, I am unable to create an xorg.conf at all. I tried multiple things:
- Login to a
tty5session, typesudo service gdm3 stopand thensudo X -configuregives me the following error:Cannot establish any listening sockets - Make sure an X server isn't already running, which doesn't make any sense since X should not be running at that point. - Enter ubuntu in Recovery mode and type
sudo X -configuregives me instead another one :modprobe: FATAL: Module fbcon not found in directory /lib/modules/$kernel intel: waited 2020 ms for i915.ko driver to load Number of created screens does not match number of detected devices. Configuration failed. (EE) Server terminated with error (2). Closing log file.
At this point, I do not know what to do. Any suggestions?
