So over the last few weeks I’ve been trying to sort out the final problems with my XPS 13. The last, and most annoying problem I’ve seen is the frequent and seemingly random lockups on suspend.

This bothers me a lot because it effectively means I can’t just close the lid on the laptop and toss it in a bag and go.

Based on what I’ve observed the issue seems to be solidly within the A05 BIOS. From my understanding, speaking with Dell Pro Support, this BIOS revision is beta, and only available to those users who have either received new systems after October 15th 2014, or had their motherboards replaced to address the coil whine problem.

The issue it self appears to relate closely to the power state the laptop is in, and the fact that the OS may change the power state when plugged in, to something not regonized or supported by the BIOS at the time.

So effectively you can suspend and resume reliably, so long as you don’t have the power plug, plugged in while the system is running. Of that, it seems to take some time (i.e. secondary power state change) for it to reliably trigger the hang when suspending into memory.

I can’t seem to determine much past that as the OS has handed off duties to the BIOS and it’s the BIOS which fails to bring the system down to sleep.

If you want to comment with Dell on this, I have an active thread here:

http://en.community.dell.com/techcenter/os-applications/f/4613/t/19604474