I just bought an Acer Swift 3 SF314-56-35xs model N17W7 and installed Ubuntu 18.04 LTS (kernel 5.0.0-29-generic).
It works, but every 5 minutes or so, the whole system freezes temporarily. I can move the mouse pointer, but nothing is responsive. Nothing happens when I click or type on the keyboard. UI is completely frozen.
After like 2 minutes, the system unfreezes, and key presses etc "catch up".
dmesg gives the following output:
... nvme nvme0: I/O 493 QID 1 timeout, completion polled nvme nvme0: I/O 837 QID 3 timeout, completion polled nvme nvme0: I/O 348 QID 4 timeout, completion polled ...
and things like
... systemd-journald.service: Start operation timed out. Terminating snapd.service: Start operation timed out. Terminating snapd.service: State 'stop-sigterm' timed out. Killing. Failed to start Journal Service. Failed to start Snappy daemon. ...
Based on this post I've tried adding the following
intel_idle.max_cstate=0 processor.max_cstate=1 modprobe.blacklist=dw_dmac,dw_dmac_core
...but the problem with temporary freezes persists.
Any idea what the freezes could be due to would be greatly appreciated.
Graphics: UHD Graphics 620
Update: The dmesg output repeats over and over, but seem to only start being generated after suspend/resume.