1 Nickel

RE: Dell XPS 13 restarts when waking up from sleep on battery power

OK, so I finally seem to have fixed it myself (thanks to a post on Reddit).

The solution:

  1. Ensure you have BIOS version 1.2.3 or later; if not, update it
  2. Shut down computer
  3. Start up again while holding down F2, to go into the BIOS
  4. From the menu choose Power Management, then Block Sleep, then check the Block Sleep box at the top

This removes the Sleep option from Start menu>Power (and elsewhere), but fixes the problem. From the behaviour, it now seems to be hibernating rather than sleeping when I close the lid or press the power button, in that it takes longer to 'sleep' and wake up. Whatever, it works.