Total system lockup unresponsive from console, ssh, network, parity check stops, no disk activity at all, no VM working, nothing functioning what so ever. I suffer this lock up when ever I install 6.6.0+. Though it was because of the RealTek NIC problem so downgraded to 6.5.3 and then updated to 6.6.3 and had worse network issues so down graded to 6.5.3. Then Upgraded to 6.6.5 and the RealTek NIC error has been rectified but the Lockup problem remains.
The system will run for about 5 or 6 days lock up then run 6 hours lock up and run 3 hours lock up then 30 minutes and lock up. I can't get system logs because they are not stored on flash. I already downgraded to the stable 6.5.3 image. My system log on first boot after the 4 lock up in one day is attached. The first was after the first lock up and the last after the 4th. Don't know if they will help because they were taken after a reset button press to get the system back up.
BIOS was updated to the latest BIOS for my motherboard after the second lockup because I saw a hardware error about microcode in the log file 1923. That same error is in log file 2357.