So, this weekend I tried upgrading my router (dlink Dir860L B1) to 18.06.2, from 18.06.1. Runs fine, for a couple of hours at a time, at which point the log gets filled up by thousands of lines like these:
May 12 22:58:45 XXX kernel: [ 3299.298766] mt76x2e 0000:01:00.0: MCU message 31 (seq 14) timed out
May 12 22:58:47 XXX kernel: [ 3301.378852] mt76x2e 0000:01:00.0: MCU message 31 (seq 15) timed out
May 12 23:36:03 XXX kernel: [ 1374.600574] mt76x2e 0000:02:00.0: MCU message 31 (seq 9) timed out
May 12 23:36:05 XXX kernel: [ 1376.680594] mt76x2e 0000:02:00.0: MCU message 31 (seq 10) timed out
May 12 23:36:07 XXX kernel: [ 1378.760591] mt76x2e 0000:02:00.0: MCU message 31 (seq 11) timed out
May 12 23:36:09 XXX kernel: [ 1380.840616] mt76x2e 0000:02:00.0: MCU message 31 (seq 12) timed out
To get wifi running again, I have to reboot. I've googled (or "researched", as the kids say), and I'm not finding any solid information about whether this is fixed or no. Does anybody else know?