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I just installed Ubuntu (20.04) on my new system (Ryzen 3600 with Gigabyte B450 Aorus M), and my system simply won't shutdown.

When I issue a shutdown (either from GUI, shutdown command or systemctl poweroff command), the system will shutdown, and start again after a couple seconds.

When I issue a "suspend" via systemctl, the screens turns off, but the fans are still running.

On Windows 10, I face no such problem.

There seems to be some incompatibility between Ubuntu and my hardware, but I have no idea how to go and troubleshoot this.

Could anyone please help me?

Eric
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  • Welcome to askUbuntu! This seems like a power management issue. Is it a laptop or desktop computer? – dlin Apr 27 '20 at 23:42
  • Hello! This is a desktop computer, BIOS is up to date. – Eric Apr 27 '20 at 23:44
  • Does "journalctl --boot=-1" show any errors during the shutdown sequence? It may shut down but doesn't power off, hence why the screen turns black but the fans are still spinning – dlin Apr 27 '20 at 23:51
  • I'm not seeing any error: avril 28 01:23:32 Desktop-Ubuntu systemd[1]: Reached target Shutdown. [...] avril 28 01:23:32 Desktop-Ubuntu systemd[1]: Reached target Final Step. avril 28 01:23:32 Desktop-Ubuntu systemd[1]: systemd-poweroff.service: Succeeded. avril 28 01:23:32 Desktop-Ubuntu systemd[1]: Finished Power-Off. avril 28 01:23:32 Desktop-Ubuntu systemd[1]: Reached target Power-Off. avril 28 01:23:32 Desktop-Ubuntu systemd[1]: Shutting down. – Eric Apr 28 '20 at 11:18

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