Comment 15 for bug 1638788

hmmm right now I'm having a hard time reproducing this at all. I'm currently on stock 4.8.0-27-generic kernel and right now I do NOT experience the issue at all.

I've done a fair amount of further troubleshooting and this is what seems to be the pattern for me:

- the problem seems to have completely disappeared since powering OFF the laptop (not just restart)

- once the problem starts to appear initially disabling XHC1 will be enough and the laptop will sleep correctly.

- eventually for whatever reason disabling XHC1 is no longer enough and disabling LID0 is required - disabling LID0 seems to always fix the problem

- I'm unclear what makes the problem appear in the first place. right now I've been running 4.8.0-27-generic for a few days with multiple sleeps/wakeups without workaround (both XHC1 and LID0 enabled) without any issue

- I should also state that when testing 4.9-rc3 a few days ago I never fully powered off the laptop. I merely rebooted into the new kernel (and than back into the old stock one) which never fixed the problem. only the complete power off fixed it.

I can post more again when the problem starts to occur again. or if anybody knows of anything that I could test now (when its working) and again when it breaks? (i.e. dunno dump the ACPI event registers of some sort? I'm not very familiar with the inner workings of ACPI)

sorry guys, I can post more once it starts happening again...