Created attachment 282845 [details]
journal logs

Started experiencing this shortly after upgrading from linux-5.0.13.arch1-1-x86_64 to linux-5.1.2.arch1-1-x86_64.

This is pretty easily reproducible. I run a Win10 VM with the disk image stored on an NFS volume. The connection to the NFS server is via Wifi, as one would expect booting a Windows VM puts a heavy load on the Wifi. Under normal circumstances Windows boots in 3-4mins. Since upgrading to kernel 5.1.2 I lose complete connectivity shortly after booting Windows 10, the error displayed in my dmesg is:

May 15 22:35:16 nuc.opendmz.com kernel: iwlwifi 0000:02:00.0: Microcode SW error detected.  Restarting 0x2000000.
May 15 22:35:16 nuc.opendmz.com kernel: iwlwifi 0000:02:00.0: Start IWL Error Log Dump:
May 15 22:35:16 nuc.opendmz.com kernel: iwlwifi 0000:02:00.0: Status: 0x00000100, count: 6

More logs attached.

After the firmware crash, the Wifi will eventually recover, and NetworkManager will reconnect. After a few minutes, it will crash again.

If I roll back to 5.0.13 or the LTS kernel I experience no errors whatsoever. Something has definitely changed with the 5.1.2 kernel.