My qubes machine locked up.
I rebooted - it found an aborted journal.
Booted from a live Debian CD, fscked boot and every lvm under /dev/qubes/*
Fsck found a bunch of errors on root so I fixed them. Rebooted, same problem, lightdm has errors and fs gets remount ro.
This is a clean install on brand new hardware. No choice but to reinstall and restore from backup but curious if I missed a better solution.