I had recently upgraded to Jaunty beta. Yesterday, after updating via synaptic (mark all updates - smart upgrade), I didn't immediately reboot and did another smart upgrade. Also, after all updates, i did 'apt-get clean`. Now I have the same problem as mentioned in the first post, but the proposed fix didn't work: after mounting the / and /boot partitions for my ubuntu (which lives in an external usb disk) using a live cd, chroot'd and did dpkg --configure -a, with no effect (seemed to do nothing). After that, I did dpkg-reconfigure udev, with the following output:

root@ubuntu:/# sudo dpkg-reconfigure udev
sudo: unable to resolve host ubuntu
sh: cannot create /dev/null: Permission denied
sh: cannot create /dev/null: Permission denied
grep: /proc/self/status: No such file or directory
Cannot find /proc/version - is /proc mounted?
invoke-rc.d: ----------------------------------------------------
invoke-rc.d: WARNING: invoke-rc.d called during shutdown sequence
invoke-rc.d: enabling safe mode: initscript policy layer disabled
invoke-rc.d: ----------------------------------------------------
/usr/sbin/invoke-rc.d: 339: cannot create /dev/null: Permission denied
xargs: `/dev/null': Permission denied
/usr/sbin/invoke-rc.d: 339: cannot create /dev/null: Permission denied
xargs: `/dev/null': Permission denied
/usr/sbin/invoke-rc.d: 339: cannot create /dev/null: Permission denied
xargs: `/dev/null': Permission denied
Kernel uevent sequence number not available, cowardly not restarting udev
No diversion `local diversion of /sbin/udevadm to /sbin/udevadm.upgrade', none removed
update-initramfs: Generating /boot/initrd.img-2.6.28-6-386
/usr/sbin/mkinitramfs: 221: cannot create /dev/null: Permission denied
/usr/sbin/mkinitramfs: 221: cannot create /dev/null: Permission denied
[repeated many times]
/usr/sbin/mkinitramfs: 221: cannot create /dev/null: Permission denied
/usr/sbin/mkinitramfs: 221: cannot create /dev/null: Permission denied
/usr/sbin/mkinitramfs: 230: cannot create /dev/null: Permission denied
/usr/sbin/mkinitramfs: 230: cannot create /dev/null: Permission denied
/usr/sbin/mkinitramfs: 248: cannot create /dev/null: Permission denied
/usr/sbin/mkinitramfs: 248: cannot create /dev/null: Permission denied
/usr/sbin/mkinitramfs: 255: /usr/sbin/mkinitramfs: 255: cannot create /dev/null: Permission denied
cannot create /dev/null: Permission denied
/usr/sbin/mkinitramfs: 282: cannot create /dev/null: Permission denied
/usr/sbin/mkinitramfs: 282: cannot create /dev/null: Permission denied
/usr/sbin/mkinitramfs: 285: /usr/sbin/mkinitramfs: 285: cannot create /dev/null: Permission denied
cannot create /dev/null: Permission denied
/usr/sbin/mkinitramfs: 286: cannot create /dev/null: Permission denied
/usr/sbin/mkinitramfs: 286: cannot create /dev/null: Permission denied
/usr/sbin/mkinitramfs: 287: cannot create /dev/null: Permission denied
/usr/sbin/mkinitramfs: 287: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/brltty: 20: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/brltty: 20: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/brltty: 22: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/brltty: 22: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/fuse_utils: 11: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/fuse_utils: 11: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/fuse_utils: 13: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/kernelextras: 37: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/kernelextras: 40: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/kernelextras: 44: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/ntfs_3g: 18: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/ntfs_3g: 18: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/thermal: 46: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/thermal: 46: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 24: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 24: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 27: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 27: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 28: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 28: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 44: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 44: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 45: /usr/share/initramfs-tools/hooks/udev: 45: cannot create /dev/null: Permission denied
cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 46: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 46: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 47: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 47: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 48: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 48: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 50: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/udev: 50: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/usplash: 23: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/usplash: 23: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/usplash: 24: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/usplash: 24: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/usplash: 27: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/usplash: 27: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/usplash: 31: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/usplash: 31: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/watershed: 25: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/watershed: 25: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/dmsetup: 22: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/dmsetup: 22: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/kbd: 19: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/kbd: 19: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/kbd: 20: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/kbd: 20: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/kbd: 21: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/kbd: 21: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/lvm2: 23: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/lvm2: 23: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/lvm2: 29: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/lvm2: 29: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/lvm2: 29: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/mdadm: 27: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/mdadm: 27: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/mdadm: 44: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/mdadm: 44: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/mdadm: 44: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/mdadm: 44: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/mdadm: 44: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/mdadm: 44: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/mdadm: 44: cannot create /dev/null: Permission denied
/usr/share/initramfs-tools/hooks/mdadm: 44: cannot create /dev/null: Permission denied
cpio: ./sbin/udevadm: Cannot stat: No such file or directory
update-initramfs: failed for /boot/initrd.img-2.6.28-6-386
root@ubuntu:/# 

It seems udevadm isn't installed, should it be?

I still can't boot my laptop, what should I do?

I attached the dpkg.log