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
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1617599 Title: Resume from suspend causes reboot, except if USB key is plugged in Status in linux package in Ubuntu: Incomplete Bug description: 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1617599/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
