Resume from suspend causes reboot, except if USB key is plugged in

[Cyril Soler]

I have been struggling to find out how to get my Dell M3800 laptop using Ubuntu 16.04 to resume from suspend. It goes into suspend with no errors in /var/log/pm-suspend.log. But when resuming, it immediately reboots, with no errors in /var/log/pm-suspend either.
Suspend/resume works out of the box when using a Ubuntu 16.04 live CD, but not when using the fresh installed 16.04 afterwards.

WORKAROUND:
1) Resume works perfectly when any USB key is plugged in.
2) Enable "USB Wake support" in the BIOS.

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1617599

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Cyril Soler (csoler-users)]

Sorry but I cannot afford to publicly display the full specifications of my system. Please tell me what you look for in particular. I can provide all the necessary information. Sorry for the inconvenience.

[Cyril Soler (csoler-users)]

It seems to be a problem of misconfigured BIOS. In the first place I had to enable "USB Wake support" in the bios (v.A09) in order to allow the computer to wake up. Before that, it would just not wake up at all and needed a hard reboot to do so. I'm not sure that Linux is at stake at all.

[penalvch (penalvch)]

Cyril Soler, to clarify, if/when you had Windows installed on the laptop, if you didn't utilize the WORKAROUNDs would it suspend/resume successfully?

[Cyril Soler (csoler-users)]

I do not have windows, but I suppose that the same would apply on windows. It seems to me indeed that when the computer is woken up, the operating system doesn't even have a clue (as I can see in the various logs in /var/log) that is gets started up from scratch instead of being woken up from S3 mode.

I upgraded my BIOS to A10 yesterday. The same exact bug remains.

[penalvch (penalvch)]

Cyril Soler, if the same thing is confirmed to happen with Windows, than this report would be moot. However, if it doesn't, then there might be something to emulate here. If you would be looking for this, it would be helpful to test to it via https://www.microsoft.com/en-us/evalcenter/ . Otherwise, feel free to close this as Status Invalid.

[Adam Chou (adam-chou)]

Not sure if this helps, but I was having similar issues on my Dell Precision 7510. I edited /etc/grub/default as listed in this link and it is now working: http://askubuntu.com/questions/58627/resume-from-suspend-occasionally-causes-a-restart

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]