My laptop shuts down when I close the lid even though it's set to hibernate

No idea what's wrong with my laptop. On the Power settings page, it's set to Suspend when the lid is closed, but for the last few days - out of nowhere, having not edited any power settings myself - whenever I open up my laptop lid the laptop boots up from scratch, so it clearly isn't going into hibernation anymore.

It's a Dell XPS 13 (9350) on 16.04 if that helps.

Thank you!

Solution 1:

With sudo powers open up /etc/systemd/logind.conf and look for the following two lines:

#HandleLidSwitch=suspend
#HandleLidSwitchDocked=suspend

If they begin with a hash tag (#) remove it and set your option to ignore, poweroff, reboot, halt, suspend, hibernate, hybrid-sleep, lock or kexec. More details can be found at Power Management

This worked for me and hopefully works for you too.

Bug Reports

There are many bug reports starting in August 2016 with Linux Suspend / Resume issues. This bug report has lots of solutions. One comment #140 has grub command line changes that are confirmed to work:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor acpi_osi='!Windows 2013' acpi_osi='!Windows 2012'"

If this doesn't work, by all means check out the other solutions in this bug report. Also check out other bug reports using google search string: "Resume shuts down 16.04"