Quoting Stefan Bader ([email protected]): > This looks quite like it is likely related to /usr/share/initramfs- > tools/scripts/init-bottom/udev. How things should work is:
This is also where it appears to hang on my systems. > - we got the initramfs mounted as initial / > - udev gets started and left running until the real root device node becomes > available > - now udev gets stopped (used to be clubbed to death which caused even more > problems) and /dev is tried to be > moved to <realroot>/dev. > - <newroot> bcomes /, restart udev, and things should proceed from there > > >From the serial console log of comment #18 it looks like things went ok > until the time udev should stop. There is no error message there but > somehow it looks like fsck in the new / does not find the uuid link for > it. Unclear whether maybe the move of /dev did not work, or did the > previous step resolve the uuid to dev without the symlink? As Adam > mentioned before, allowing udev to settle helps. So the race is > somewhere there. Whoever can reproduce this may want to add additional > echo's to the init-bottom script. (TBH I don't believe anyone can 'not reproduce it'. It sometimes takes me 10 boots, but a standard ubuntu server kvm vm with a single primary partition on virtio occasionally hangs there as well). I've tried adding echos, but as near as I can tell, adding any echo before the udevadm control --exit stops the hang. I rebooted 10 times last night trying to do a 'ps -ef' before it, but that seemed to slow it down just enough to stop the race. I've tried (blindly) installing a recompiled udev which keeps handling inotify events while waiting to exit, but that doesn't seem to be the problem. It looks as though udevadm control --exit simply is hanging. Perhaps some debug statements in udevd itself will be more helpful. (will try) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/818177 Title: HP DL380G5 root disk mounted read-only on boot and boot fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/818177/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
