Xiaodong Xu

Attaching the kernel log see if it helps. kern.log.1

Sorry I'm not able to find the sub category for M4V2 so I chose R4S instead. But please keep in mind that this is a bug report for NanoPi M4V2. So my box has been running well for 5 years without any issue, through multiple system upgrade from armbian buster to trixie. However after I upgrade the kernel from 6.12.58 to 6.18.10 just a couple of days ago, the system started to have some weird behavior. The main symptom is that I'll lose the network connection from the box once it starts up, and it could happen after just a few minutes, or a couple of hours. I have to power cycle the box to get it back online as I don't have any peripherals, and soon I will lose the connection again. Other symptoms I've observed so far: - Once I lost the connection and powered cycle the box, the timestamp in the log looks confusing. Somehow the system clock paused at the moment when system froze. When it boots up, there could be a large gap between the NTP server and it will have to sync up, and I don't even seem to be able to find any logs before this reboot - The line `fdtfile=rockchip/rk3399-nanopi-m4v2.dtb` in `/boot/armbianEnv.txt` looks to be missing, so I added it back but it didn't fix the issue Eventually I downgraded to 6.12.58 with armbian-config, by timing the time window between the bootup and system freeze. After that the issue seems to be gone. Please find the results for `armbianmonitor -u` at https://paste.armbian.com/werujijedo For those who has the same model as mine, please think twice before upgrading. Do backup your data if you'd like to take the risk.