(In reply to Patrik Kullman from comment #96)
> Actually it doesn't seem to suspend properly, I get a lot of these while
> suspended:

Well, that's how the platform works, unfortunately.

The EC needs to be enabled to wake up the system for the power button wakeup to work, but if the EC is enabled to wake up the system, it will wake it up every once a while, so either-or.

I would argue that this is an EC firmware bug on the XPS13 9365.

> [48773.433130] Suspended for 1.736 seconds
> [48773.487290] PM: noirq resume of devices complete after 54.007 msecs
> [48773.584996] PM: noirq suspend of devices complete after 92.106 msecs
> [48773.640021] PM: noirq resume of devices complete after 55.019 msecs
> [48773.693010] PM: noirq suspend of devices complete after 52.909 msecs
> [48774.772925] Suspended for 0.739 seconds
> [48774.827173] PM: noirq resume of devices complete after 54.107 msecs
> [48774.924789] PM: noirq suspend of devices complete after 92.105 msecs
> [48774.979256] PM: noirq resume of devices complete after 54.460 msecs
> [48775.040788] PM: noirq suspend of devices complete after 61.453 msecs
> [48776.118507] Suspended for 1.732 seconds
> [48776.173052] PM: noirq resume of devices complete after 54.401 msecs
> [48776.274384] PM: noirq suspend of devices complete after 96.105 msecs
> [48776.328516] PM: noirq resume of devices complete after 54.124 msecs
> [48776.386397] PM: noirq suspend of devices complete after 57.801 msecs
> [48777.458479] Suspended for 0.731 seconds
> [48777.512360] PM: noirq resume of devices complete after 53.748 msecs
> [48777.578332] PM: noirq suspend of devices complete after 60.094 msecs
> [48777.639708] PM: noirq resume of devices complete after 61.369 msecs
> [48777.698355] PM: noirq suspend of devices complete after 58.569 msecs
> [48778.803968] Suspended for 0.760 seconds
> [48778.858508] PM: noirq resume of devices complete after 54.374 msecs
> [48778.955839] PM: noirq suspend of devices complete after 92.111 msecs
> [48779.010944] PM: noirq resume of devices complete after 55.097 msecs
> [48779.067844] PM: noirq suspend of devices complete after 56.823 msecs
> [48780.143970] Suspended for 1.736 seconds
> [48780.198045] PM: noirq resume of devices complete after 53.932 msecs
> [48780.299838] PM: noirq suspend of devices complete after 96.105 msecs
> [48780.354429] PM: noirq resume of devices complete after 54.583 msecs
> [48780.415834] PM: noirq suspend of devices complete after 61.318 msecs
> [48781.489487] Suspended for 0.728 seconds
> [48781.543593] PM: noirq resume of devices complete after 53.953 msecs
> [48781.641374] PM: noirq suspend of devices complete after 92.110 msecs
> [48781.702691] PM: noirq resume of devices complete after 61.310 msecs
> [48781.761389] PM: noirq suspend of devices complete after 58.618 msecs
> [48782.829505] Suspended for 0.727 seconds
> [48782.883630] PM: noirq resume of devices complete after 53.983 msecs
> [48782.985371] PM: noirq suspend of devices complete after 96.111 msecs
> [48783.039782] PM: noirq resume of devices complete after 54.403 msecs
> [48783.089373] PM: noirq suspend of devices complete after 49.510 msecs
> [48784.175236] Suspended for 1.740 seconds
> [48784.230309] PM: noirq resume of devices complete after 54.926 msecs
> [48784.323101] PM: noirq suspend of devices complete after 88.100 msecs
> [48784.377473] PM: noirq resume of devices complete after 54.365 msecs
> [48784.435113] PM: noirq suspend of devices complete after 57.558 msecs
> [48785.515050] Suspended for 0.740 seconds
> [48785.569140] PM: noirq resume of devices complete after 53.939 msecs
> [48785.666922] PM: noirq suspend of devices complete after 92.106 msecs
> [48785.721166] PM: noirq resume of devices complete after 54.237 msecs
> [48785.774929] PM: noirq suspend of devices complete after 53.676 msecs
> [48786.860605] Suspended for 0.739 seconds
> [48786.914870] PM: noirq resume of devices complete after 54.121 msecs
> [48787.012472] PM: noirq suspend of devices complete after 92.104 msecs
> [48787.067280] PM: noirq resume of devices complete after 54.801 msecs
> [48787.124480] PM: noirq suspend of devices complete after 57.120 msecs
> [48788.200622] Suspended for 1.736 seconds
> 
> And on resume I get a, most likely completely unrelated and purely cosmetic:
> 
> [49569.968486] intel-vbtn INT33D6:00: unknown event index 0xcd

I'm quite confident that this is not the event that woke you up, but can you paste more lines from dmesg around this for more context?