Hi,
I received my M4 4GB SBC a few weeks back. I have a couple of minor issues--curious if others have seen the same.
1. With Armbian Bionic 4.4 kernel, I get a reboot about every 24 hours. It just reboots itself (no shutdown, the logs just start with a boot). I upgraded to the 4.19-rc1 kernel and this is no longer an issue.
2. SSD drives connected to the USB3 ports after about a day just fall off. If re-insert, nothing. If I reboot, nothing. I have to remove power from the M4 for the drives to appear again. I think I saw this with the 4.4 kernel as well. I'm waiting for it to happen again so I can more carefully look at dmesg and syslog. The drives are not mounted and are not being used (mounting does not make a difference).
I have the heat sink installed. I'm powering via the GPIO pins with a POE+ splitter. I've been able to run linpack (xhpl version) using most of the 4GB of RAM pushing the power to 18.5W without issue. No crashes, no overheating, etc... The demonstrated performance for DP floating point is 2x that of the RPI3B+. 1.5x that of Odroid C2. Docker, nspawn, and other tests work great, no probs. I'd replace my C2 and RPI3s with these if the USB ports would stop losing my storage.
Right now with two SSDs connected and system idle I'm pulling only 8W max. I do not think I have a power problem. I power all my other 10 SBCs with POE splitters without issue. My POE switch is not even close to at capacity. Uptime for other SBCs are in the 100+ day range--and no loss of storage.
I just did a 2nd xhpl test with both drives connected and pulled up to 21.8W. No crash. Drives still there. I expect the drives to be gone in 12-24 hours.
Any ideas? Thanks.
