"root=/dev/mapper/dmroot crashed"

[dev...@gmail.com]

I'm getting this error in a popup login:

> Oops!

> We're sorry, it looks like root=/dev/mapper/dmroot crashed.
> Please contact the developer if you want to report the issue.

I haven't identified any problems, though. It happened subsequent to this mistake and repair: https://groups.google.com/forum/#!topic/qubes-users/HP1XyUuXFtc

Any thoughts?

Thanks /D.

[dev...@gmail.com]

Hmm. Two devices with the same major:minor numbers? /dev/mapper/dmroot & /dev/dm-0

/dev/mapper/dmroot does not appear in Dom0, nor does any error appear in journalctl. I do find that device in sys-{net,firewall,whonix,usb} and in those cases it always appears as:

ls -l /dev/mapper/dmroot
brw-rw---- 1 root disk 251, 0 May 13 20:11 /dev/mapper/dmroot

lsblk /dev/xvdc
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
xvdc 202:32 1 11.5G 0 disk
├─xvdc1 202:33 1 1G 0 part [SWAP]
└─xvdc2 202:34 1 10.5G 0 part
└─dmroot 251:0 0 10G 0 dm /

In each of these VM's I find only one error related to dmroot. On a single bootup (but not subsequently) and in all the VM's:

May 13 02:56:21 fedora-25 systemd-udevd[7757]: conflicting device node '/dev/mapper/dmroot' found, link to '/dev/dm-0' will not be created

In all those VM's I also find:

ls -l /dev/dm-0
brw-rw---- 1 root disk 251, 0 May 13 20:11 /dev/dm-0

Notice the same major:minor numbers as /dev/mapper/dmroot

[qubenix]

dev...@gmail.com:

I'm also getting this error from my usb vm on startup. It has a Fedora24
template. The template is untouched from initial Qubes install, aside
from updates via qubes-vm-r3.2-current-testing repo.

For me the issue just started today for no obvious reason.

--
qubenix
GPG: B536812904D455B491DCDCDD04BE1E61A3C2E500