I upgraded Kubuntu from 17.10 to 18.04 LTS today. Upgrade went well, until the system rebooted. I got the Kubuntu splash screen, but then: nothing. Black screen. I can however enter TTY 2-6 (1,7,8 not responding). I'm using a laptop with both Intel integrated graphics and NVidia GeForce GT 520 MX graphics card.
apt update && apt dist-upgrade
- reconfigure sddm (
- installing different NVidia drivers, as I had problems with the driver last time I installed ubuntu. (nvidia-304- not able to install,nvidia-driver-390, didn't help. nvidia-340: and nouveau, also didn't help
- Adding 'nomodeset' to
/etc/default/grub: no help
startxto start the Xserver myself. This results in an error, being that Xserver is not able to start.
kstart plasma-desktopshows the following error
cannot connect to X server
What would be the right way to do it?