After upgrading to Ubuntu 15.10, I face an issue with the suspend feature.

The reproduction workflow is the following :

  1. Boot the system and open a session
  2. Suspend
  3. Wake up <- At this point, everything is going well
  4. Suspend again
  5. Wake up <- This is where I get a blank screen

I have tried the following :

  • Disable Wifi before suspending
  • Spamming the Escape or Space key while waking up
  • Increasing the brightness of the screen after waking up
  • Switching between Ctrl+Alt+F2/Ctrl+Alt+F7
  • Blindly typing my password

None of those actions work in my case.

My question is : does someone have an idea of what is going on, and do you know if there is a log file or something that could help me to figure out what fails ?

  • 1
    there might be some information in /var/log/pm-suspend.log, but look everywhere in /var/log – Doug Smythies Nov 25 '15 at 15:46
  • 1
    pm-suspend.log is empty. I also checked /var/log/lightdm/lightdm.log, kern.log and Xorg.0.log, but nothing caught my eye. – dounyy Nov 25 '15 at 21:25
  • 1
    Because 15.10 uses systemd I will make a "journal" folder in /var/log/ to enable history journal, after a system restart you will be able to see older logs (not only actual boot), than you can try analyse your log with journalctl -b xxxxxx. Where xxxxxx is a boot session to choose – EdiD Nov 29 '15 at 15:00
  • 1
    I think this should go to the bugtracker. I face the same issue on an upgrade of Ubuntu 15.04 to 15.10. A clean install of 15.10 works fine without issues. – Ashhar Hasan Dec 5 '15 at 20:56
  • @EdiD: This directory remains empty. Did I miss something ? – dounyy Dec 6 '15 at 16:10

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