Since I installed kernel 3.5.0-21-generic (64 bit) on Mint Nadia about 4 days ago, I have been unable to shut down my computer. If I hit the 'shutdown' button or invoke shutdown from the command line the machine just reboots, it doesn't shut down. The problem also occurs in Ubuntu with the same kernel (though there it does occasionally shut down correctly, in Mint it never does). If I revert back to kernel 3.5.0-19 on either distro the computer shuts down properly every time.
There are no shutdown error messages (I don't run a splash screen so I can read them) the shutdown sequence is perfectly normal, but always ends in a reboot.
Anyone else with this problem or information about it (I haven't found any yet).
EDIT. Correction I found a similar though not identical report here:
https://bugzilla.kernel.org/show_bug.cgi?id=48311
It seems it is affecting only efi booted machines which is probably why there are so few reports.







