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[Chris Good <chris.good@xxxxxxxxxxxxxx>]

Hi Alberts,
I have changed ~/.xsession to :
gnome-session --session=gnome-flashback --disable-acceleration-check --debug
and attached the resulting ~/.xsession-errors (xsession-errors20150501)

I removed:
export DESKTOP_SESSION="gnome-fallback"
export XDG_CURRENT_DESKTOP="Unity"
which you suggested in bug 1251281. If you'd like to see the --debug output with those settings included, please let me know.

I saw there are some suspicious msgs in xsession-errors20150501 that made me think dropbox may be the problem.
So I did the test again as a different user (tims) which does not use dropbox. Unfortunately, the seesion still hangs on logout.
The debug xsession errors for that test are attached as xsession-errors-tims-nodropbox.

Thanks very much for your help. Please let me know if I can do anything
else.

** Attachment added: "xsession-errors20150501"
   https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/1450279/+attachment/4388760/+files/xsession-errors20150501

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https://bugs.launchpad.net/bugs/1450279

Title:
  gnome flashback session fails to end on logout in Trusty

Status in gnome-session package in Ubuntu:
  Confirmed

Bug description:
  On logout, the window changes to a blank purple screen and never closes.
  All the processes are still running.

  This is a big problem because in Trusty, Unity needs hardware acceleration, so you cannot use Unity in any remote access scenario (like using windows remote desktop to access a VMware vSphere Ubuntu Trusty vm with xrdp) where hardware acceleration is not available.
  Many people are trying to use alternative desktops, like gnome-flashback or xfce (xfce seems to have too many downsides in this situation for me).

  This is a follow on from https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/1251281 where gnome-session-flashback was modified to accept a new flag (--disable-acceleration-check) so that a gnome flashback session could be started.
  Thanks to the patch for 1251281 we can now run gnome flashback but it doesn't logout properly, which makes it unusable.

  Environment:
  Ubuntu 14.04.2 LTS (up to date)
  gnome-session-flashback 1:3.8.0-1ubuntu12.2
  gnome-session 3.9.90-0ubuntu12.1

  ~/.xsession :
   gnome-session --session=gnome-flashback --disable-acceleration-check

  Using Windows 7 Remote Desktop to connect to Ubuntu vm.
  Login to xrdp using module sesman-Xvnc

   I have attached the ~/.xsession-errors file.

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