[daguu]

Another related issue: I have helped get a few co-workers set up with Ubuntu on their laptops. Inevitably, once every few months, one comes to me and says "I just ran an update and the 'Restart' popup came up, so I restarted, now my laptop says 'No bootable devices found.'" This happens when Ubuntu is installed in UEFI mode. A kernel update sometimes wipes out the boot image. To fix it, I to get into the BIOS and reselect a bootable UEFI image. This should never, ever happen.

[vetinari]

I have similar experience, but with Virtualbox in UEFI mode. After any restart, UEFI will complain that it cannot find anything bootable, I will run the bootloader from UEFI shell (Virtualbox does not have BIOS menus), in booted system run the efibootmgr to register it, just to have it lost at next reboot and doing the dance again.

Only Ubuntu does that, other linux distributions don't have this problem.