A pair of UEFI updates
Matthew Garrett has posted a summary of currently-known problems with UEFI-based machines and Linux. "Some Lenovos will only boot Windows or Red Hat Enterprise Linux. I recommend drinking, because as far as I know they haven't actually got around to doing anything useful about this yet."

Meanwhile, James Bottomley has put up a report on his work with the Linux Foundation's secure boot loader. "The upshot of all of this is you can now use Pre-BootLoader with Gummiboot (as demoed at LCA2013). To boot, you have to add two hashes: one for Gummiboot itself and one for the kernel you’re booting, but actually this is a good thing because now you have a single security policy controlling all of your boot sequence. Gummiboot itself has also been patched to recognise a failure due to secure boot and pop up a helpful message telling you which hash to enrol."