When I enter the boot option editing screen from the main Grub 2 screen on my laptop and I press and hold Down, the cursor moves further and further down even when I release Down, as somewhat expected. But when it reaches the first empty line after the boot options and apparently continues attempting to move downwards, the screen freezes (I can't move the cursor anymore) and the fan spins up, and that's the way it stays. I'll try leaving the screen alone for a bit more and report back, and also whether other buttons still work.
When I move the cursor to the first empty line in single-step increments and then press Down, nothing happens as expected and the cursor stays responsive.
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: grub-efi 2.00-13ubuntu3
ProcVersionSignature: Ubuntu 3.8.0-27.40-generic 3.8.13.4
Uname: Linux 3.8.0-27-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.9.2-0ubuntu8.1
Architecture: amd64
Date: Thu Aug 1 22:55:18 2013
InstallationDate: Installed on 2013-01-01 (212 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
SourcePackage: grub2
UpgradeStatus: Upgraded to raring on 2013-04-28 (95 days ago)
No reaction at all, even after waiting several minutes - no hotkey works anymore. Additionally, the freeze also happens with the first line shown on the screen if I first move the cursor down and then hold Up.