Using testing repos - was fully updated and all working fine. Then picked up the latest 3.7.2-1 kernel along with kdebase 4.9.5-2/ Rebooting after this latest update fails - it cannot find the root device and drops to "recovery shell". ls /dev/sdb1 (the usual root device) is def missing at that point. The recovery option does not boot either. What I tried: I booted 2013.01.04 arch install media - did a chroot as per the wiki - and attempted to roll back the kernel using pacman on the 3.7.1 package I get several errors: warning could not get filesystem information for things like: /run/archiso/bootmnt /sys/fs/cgroup/systemd /run is empty - and /sys/fs/cgroup is empty As per the chroot wiki /sys is mounted from the install via mount -t sysfs sys sys/ pacman continues beyond these warnings but fails with: ==> building image from preset: 'default' -> -k /boot/vmlinux-linux -c /etc/mkinitcpio.conf -g /boot/initramfs-linux.img ERROR: invalid kernel specified: '/boot/vmlinux-linux' same error from ;fallback'. I am hoping I can install 3.7.1 kernel and boot again - instead of a new install. If anyone can offer some guidance I'd be appreciative ... thank you gene