“Starting version 219” after kernel upgrade to 3.19.0-18

Today after kernel upgrade from 3.19.0-16 to 3.19.0-18 lightdm fails to start.

GPU driver is fglrx installed from “Additional drivers” tab of “Software & updates”.

Try to enable service by running

sudo systemctl enable lightdm.service -f

doesn’t help because service failed to start. See syslog:

May 22 19:49:05 SSERG-U38DT systemd[1]: Started Update UTMP about System Runlevel Changes.
May 22 19:49:05 SSERG-U38DT systemd[1]: Startup finished in 1.910s (kernel) + 2.987s (userspace) = 12.728s.
May 22 19:49:07 SSERG-U38DT systemd[1]: lightdm.service: main process exited, code=exited, status=1/FAILURE
May 22 19:49:07 SSERG-U38DT systemd[1]: Unit lightdm.service entered failed state.
May 22 19:49:07 SSERG-U38DT systemd[1]: Triggering OnFailure= dependencies of lightdm.service.
May 22 19:49:07 SSERG-U38DT systemd[1]: lightdm.service failed.
May 22 19:49:07 SSERG-U38DT systemd[1]: Stopped target Graphical Interface.
May 22 19:49:07 SSERG-U38DT systemd[1]: Stopping Graphical Interface.
May 22 19:49:07 SSERG-U38DT systemd[1]: Starting Terminate Plymouth Boot Screen...
May 22 19:49:07 SSERG-U38DT systemd[1]: Started Terminate Plymouth Boot Screen.
May 22 19:49:07 SSERG-U38DT systemd[1]: Started X.org diagnosis failsafe.
May 22 19:49:07 SSERG-U38DT systemd[1]: Starting X.org diagnosis failsafe...
May 22 19:49:07 SSERG-U38DT systemd[1]: Reached target Graphical failsafe fallback.
May 22 19:49:07 SSERG-U38DT systemd[1]: Starting Graphical failsafe fallback.

Choosing grub boot option of previous 3.19.0-16 kernel – system boots normally.

How to fix, please?

Answer

sserg@SSERG-U38DT:~$ inxi -F
System:    Host: SSERG-U38DT Kernel: 3.19.0-18-generic x86_64 (64 bit)
           Desktop: Unity 7.3.2  Distro: Ubuntu 15.04 vivid

Attribution
Source : Link , Question Author : Sergey Sergeyev , Answer Author : Sergey Sergeyev