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   My ASrock B850M Pro-A with Ryzen 5 7600X suddenly started to reboot after shutting down by the OS. I am running Manjaro Linux, latest.

First I tried to power down the system by "sudo poweroff" or by "sudo shutdown -h now" instead of the GUI button. But it kept rebooting.

Then I watched precisely, at what stage the computer would turn on again and I found out, that the OS is already finished, the fans and the harddisk start to spin down and then the restart happens.

I have checked all BIOS items, which could wake up the computer like PCI or LAN etc. but I did not find any setting, which would cause the reboot.

Searching the web, I found the hint, that sometimes a PSU could be the cause. But my PSU is a 350 W bequiet! PSU which formerly was used in my older computer, having a total operating time of about 500 hours only. The PSU was never causing any problems.

How can I find out the reason for auto-rebooting after shut down?

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brigitta Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 30 Jul 2025 Status: Offline Points: 210	Post Options Post Reply Quote brigitta Report Post Thanks(0) Quote Reply Posted: 3 hours 40 minutes ago at 4:39am
	My ASrock B850M Pro-A with Ryzen 5 7600X suddenly started to reboot after shutting down by the OS. I am running Manjaro Linux, latest. First I tried to power down the system by "sudo poweroff" or by "sudo shutdown -h now" instead of the GUI button. But it kept rebooting. Then I watched precisely, at what stage the computer would turn on again and I found out, that the OS is already finished, the fans and the harddisk start to spin down and then the restart happens. I have checked all BIOS items, which could wake up the computer like PCI or LAN etc. but I did not find any setting, which would cause the reboot. Searching the web, I found the hint, that sometimes a PSU could be the cause. But my PSU is a 350 W bequiet! PSU which formerly was used in my older computer, having a total operating time of about 500 hours only. The PSU was never causing any problems. How can I find out the reason for auto-rebooting after shut down?