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I upgraded Kubuntu from 15.10 to 16.04 today using the official upgrade process. The upgrade was smooth: no errors at any point during the process.

However, after rebooting, X.org fails to start up. The screen keeps "flashing" between trying to start xorg and failing (when it fails, I get thrown back to vt1). This keeps happening forever.

Here's the Xorg.0.log I pulled using a livecd: http://paste.ubuntu.com/15987227/. I see some segfaults in there, but I'm not sure how to read or analyse them.

My system is a Sony Vaio laptop with an intel and nvidia card (optimus setup). Currently, nvidia proprietary drivers are installed for occasional gaming. I'll update the post with lspci output shortly.

What I've tried till now:

  • deleting /etc/X11/xorg.conf so that it can be regenerated
  • changing the active screen in xorg.conf to intel and marking nvidia as Inactive
  • removing all unnecessary config files from /etc/X11/xorg.conf.d

Nothing has worked, and I'm still stuck in an xorg crash loop.

Edit: Some more system info:

Rohan Dhruva
  • 460

0 Answers0