I can reproduce this:
If i hold the LEFT-Cursor Key and press CTRL (LEFT+CTRL as in CTRL+c to copy) my Keyboard stops working. Mouse is still working.
[UPDATE];
Investigating a bit more systematic, I found out that this happens not only with LEFT+CTRL but with mostly __any__ key in Combination with +CTRL. (Even ENTER, Backsp, Tab, Esc, F1...F12 are affected)
The only exceptions are the following keys:
SHIFT
ALT
ALT_GR
CAPS_LOCK
NUM_LOCK
SCROLL_LOCK
BREAK
PRINT
META/Win-Key
Hope this helps!
[/UPDATE]
"Meta-keyboard-commands" outside of X (e.g. CTRL+ALT+BACKSP or CTRL+ALT+F1...) are still effective, therefore i can restart X and log in again. So i think, this is somehow related to X.
I haven't found anything interesting in .xsession-errors or /var/log/Xorg.0.log but i have attached them. I logged the output of xev while provocing the freeze:
<code>KeyPress event, serial 31, synthetic NO, window 0x3c00002,
root 0x5b, subw 0x0, time 30918556, (71,-8), root:(149,88),
state 0x2010, keycode 100 (keysym 0xff51, Left), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
FocusOut event, serial 31, synthetic NO, window 0x3c00002,
mode NotifyGrab, detail NotifyAncestor
</code>
I have tested several keyboards (HP SDL4000 PS2; Cherry RS 6000 USB) and the problem ist reproducable with all of them, so this is not related to a special keyboard- or connection-type.
Further Information:
$ lsb_release -rd
Description: Ubuntu 8.04.3 LTS
Release: 8.04
$ uname -r
2.6.24-24-generic
I've attached:
* .xsession-errors
* var/log/Xorg.0.log
* etc/X11/xorg.conf
* deadkeyboard.txt (the full trace of xev)
Thank you for taking the time to report this bug. Can you add the output of "dmesg > dmesg.log" after reproducing the issue.