[Bug 1043077] Re: upstart restarts DM to quickly

[Steve Langasek]

This is not a bug in the behavior of upstart.  If gdm and lightdm need
to be doing more cleanup before exiting upon receiving a signal from
upstart, that's a bug in those respective packages.

** Package changed: upstart (Ubuntu) => lightdm (Ubuntu)

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https://bugs.launchpad.net/bugs/1043077

Title:
  upstart restarts DM to quickly

Status in “lightdm” package in Ubuntu:
  Confirmed

Bug description:
  I am filing this against upstart since it seems to affect both lightdm
  and gdm.

  Basically, if I run:

  sudo service lightdm restart

  then it will fail with an "X Server already on display 0" message (in
  gdm logs)

  It appears that upstart is respawning the DM before the current X
  session has shutdown completely.

  If I instead do

  sudo service lightdm stop
  <wait a few seconds>
  sudo service lightdm start

  it works perfectly.

  This is 100% reproducible on my 12.10 VM and happens around 1:5 times
  on my 12.10  installation on real machine.

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