I had the same (or very similar) problem some months ago, but after a while it disappeared. When existed I could use the system using upstart element of the Grub menu. After an October update of 16.04 it returned and produces the error report starting with

ExecuteablePath /usr/lib/xorg/Xorg Package xserver-xorg-core 2:1.18.4-0ubuntu0.8 ProblemType Crash Title Xorg crashed with SIGABRT in OsAbort()

I went through steps of UPDATE APRIL: there were no ~/.config/upstart/lowgfx.conf file, I deleted files of ~/.cache/ library (and left its sublibraries), there were no /var/crash/ files, I have added the terminal command sed -i 's/-lowgfx//' ~/.config/compiz-1/compizconfig/config, restarted the system with ubuntu menu.

There were no changes in the behaviour of the system (1)the restart stopped with ubuntu on the middle of the screen with 5 dots running below it, and press of Esc resulted black screen (2)upstart (or recovery + resume) works (3)no revoke from sleep

What to do?

  • It belongs to problem"GUI/Unity crashing in 16.04 LTS after updates 2018-01-04, compiz segfaults"
    – HGI
    Oct 27, 2018 at 7:48

1 Answer 1


The problem disappeared to the end of October. A possible reason: something was (is?) not initialised in its correct place, but this causes error in some circumstances only. As a consequence of next updates the circumstances have changed. I am afraid, the problem may return, but now doesn't exist.

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