Xorg doesn't start

[Piotr Kubaj]

I've tried various options, but there's no output.
Another question: can these entries in the log file cause the issue?
[   216.704] (WW) VGA arbiter: cannot open kernel arbiter, no multi-card
support
[   216.705] drmOpenDevice: node name is /dev/dri/card0
[   216.705] Failed to change owner or group for file /dev/dri! 2: No such
file or directory
[   216.705] Failed to change owner or group for file /dev/dri/card0! 2: No
such file or directory
[   216.706] drmOpenDevice: open result is -1, (No such file or directory)
[   216.706] Failed to change owner or group for file /dev/dri/card0! 2: No
such file or directory
[   216.706] drmOpenDevice: open result is -1, (No such file or directory)
[   216.706] drmOpenDevice: Open failed
[   219.127] drmOpenByBusid: Searching for BusID pci:0000:00:02.0
[   219.127] drmOpenDevice: node name is /dev/dri/card0
[   219.128] drmOpenDevice: open result is 10, (OK)
[   219.128] drmOpenByBusid: drmOpenMinor returns 10
[   219.128] drmOpenByBusid: Interface 1.4 failed, trying 1.1
[   219.128] drmOpenByBusid: drmGetBusid reports pci:0000:00:02.0

And there's an error [   231.029] (WW) intel(0): drmDropMaster failed:
Unknown error: -22 at the end.
My notebook has only one GPU.