@xnox, Yes, it looks related to plymouth, I tried the edit the plymouth- reboot.service to let it hide splash when reboot, it won't show error /oldroot messages, it looks like same with no 'splash' parameter.
In /lib/systemd/system/plymouth-reboot.service ExecStartPost=-/bin/plymouhth hide-splash I also tried the same way on plymouth-halt.service or plymouth- poweroff.service, but it didn't work. And I also tried add the killall in /run/initramfs/, and add the hook to call 'killall plymouth', it's very bad, the message on screen is distorted, and a kernel crash. XD So killing the plymouth is not okay. Next step, I will try to move the plymouth into /run/initramfs. ** Attachment added: "1762944803.jpg" https://bugs.launchpad.net/ubuntu/+source/finalrd/+bug/1940514/+attachment/5522533/+files/1762944803.jpg -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1940514 Title: It will prompt "Failed to unmount /oldroot" when shutdown or reboot To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1940514/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
