Randomly ignored keystrokes in terminal

[Veiokej]

I was just trying to install 64-bit 14.04 LTS. Due to a video bug in the default installation image, I had to boot to a terminal instead of the usual Unity GUI. The video bug is actually fixed already, but I needed to download it. So I just did "sudo apt-get update" followed by "sudo apt-get upgrade". After the latter command, the keyboard (both internal and external) could only get keys through to the terminal about 40% of the time. In other words, I would need to press the same letter 2 or 3 times before it would appear on the screen. What's worse, the actual command that the terminal received was different than both (1) what I actually typed and (2) what appeared on the screen. So for example, I would type "poweroff" as "pppppoooowweeeroooooffffffffff". It would appear as "poweroff", but then the terminal would complain that there was no such command as "ppooweroofff". I finally gave up and rebooted. Everything works fine now, even in a terminal. But I've repeated this experiment a few times, immediately after a fresh install, and it always happens.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: gnome-terminal 3.6.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.1
Architecture: amd64
CurrentDesktop: Unity
Date: Sun May 18 10:33:06 2014
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/gnome-terminal
InstallationDate: Installed on 2014-05-18 (0 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-terminal
UpgradeStatus: No upgrade log present (probably fresh install)

[Egmont Koblinger (egmont-gmail)]

> I had to boot to a terminal instead of the usual Unity GUI.

Could you please be more specific here? What do you type or choose and where? Is it some grub boot option? Or you choose something different in the graphical login screen? What shall I do to try to reproduce this bug?