Can't shutdown or reboot system. Cannot umount /oldroot

I’m having issues of the system not shutting down nor it rebooting. Version 4.2.4 It freezes up with black screen and few lines of warnings (attached screenshot). In rare occasions it does shutdown or reboots, but 90% of the time I have to shut it down by holding power button. Any solution on this?

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Just ran into this as well. I did do the following things prior not sure if actually related in any way:

  • undock from ush b c thunderbolt dock
  • attach my laptops keyboard to a VM then detached, needed to restart sys-usb to get the keyboard back fully.

Will let it run for a bit with the charger but if I remember correctly last time I saw this it just gets hotter and doesn’t really change any overnight so may have to kill it after a bit no tty access or life from it really.

Not positive if this is what usually stops mine sometimes it doesn’t display any dialogue if I don’t hit esc quickly enough I got used to basically not shutting it off unless I had every single VM shut down and that did usually seem to work but maybe not always an option, but I didn’t do it this time.

@Paprika , @Cameron

I don’t know much about such things, but “plymouth” is the feature that gives a pretty gui during startup.

It would be interesting to try removing the rhgb item from the linux command line in the grub bootloader menu. This will give a simpler text interface during boot.

It might be useful to know how your screen is connected and what graphics device you have.

@phceac
Per your suggestion I removed rhgb item and gave it a try. At the shutdown process it stops for a 45-60 seconds with warning saying “dracut Warning: Cannot umount /oldroot”, but it eventually shuts down after 45-60 seconds.

This Thinkpad laptop. It has both CPU integrated and NVIDIA graphics card for external monitor. What goes to the laptop screen I believe uses CPU integrated graphic card and additional GPU just sits without use.

@Cameron
Per Cameron suggestion I also tried to shut down every single VM and leaving dom0. System shut down in this case without any delay.
If I shutdown all VM except system ones: sys-net and sys-usb, it shuts down same way as I remove rhgb at the boot (with a minute delay).

I wasn’t able to figure this out.
As solution, instead of shutting down 15-20 vm individually, I figured I could just shut down sys-net from qubes manager and it would ask me to shut down everything attached to it, what is basically all qubes except sys-usb, which I would shut down separately.
Now I upgraded to 4.3 and it appears this issue is gone with the upgrade.

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