How can I get rid of unknown display?
Solution 1:
There is a known bug for Intel Baytrail graphic, also for a nVidia GeForce GT 630M [10de:0de9] graphic card.
If you're using the nVidia graphic card, the solution is easy, just install the proprietary driver from the "Additional Drivers"
Another workaround is to edit your "/etc/default/grub" file, change
GRUB_CMDLINE_LINUX=""
into:
GRUB_CMDLINE_LINUX="video=VGA-2:d"
(Since the bogus unknown display is connected to VGA2 in your case)
After that, run sudo update-grub and reboot
Reference:
- An "Unknown" display appears with no external display connected on 12.04.5
- [Dell Inspiron 3531] "Unknown" display found in display utility [8086:0f31]
- Unknown display besides laptop Built-in display. Old question but with no answers
Solution 2:
Updating your drivers fixes it.sudo ubuntu-drivers autoinstall (selects recommended drivers for you)
In my case it was Nvidia.
You can also go into Additional Drivers and select a propriety driver yourself.
After updating, it changed to "(propriety, tested)" itself.
Don't forget to restart.