arch update ignore kernel
The latitude is affected by this kernel bug: https://bugs.archlinux.org/task/46894 I should make a UEFI entry for booting to the LTS kernel, but I haven't got around to this yet. So in the meantime I think I'll do what's advised in this page: https://www.digitalocean.com/community/tutorials/pacman-syu-kernel-update-solved-how-to-ignore-arch-kernel-upgrades and add IgnorePkg = Linux to /etc/pacman.conf so the kernel isn't touched until the mainline resolves the bug. [edit: did this and updated. The next time I booted I had the same problem as before. downgraded the kernel and it worked again. Need to look at moving to LTS kernel, I think]