Description of Problem:
After any usage of SysRq (Alt+PrtSc combination), *any* key press/release is
treated as Alt+PrtSc+?, i.e. prints a short help of SysRq commands.  The
keyboard isn't usable anymore, i.e. it doesn't enter keystrokes and even doesn't
switch consoles.  The only exception is SysRq itself -- those commands still
work, so that one has an ability to cleanly reboot the machine with Alt+PrtSc+S,U,B.

Version-Release number of selected component (if applicable):
kernel-2.4.18-3

How Reproducible: 
100%

Steps to Reproduce:
1. Change kernel.sysrq in /etc/sysctl.conf from "0" to "1" and reboot the
machine ("echo 1 >/proc/sys/kernel/sysrq" should be enough, but I haven't
checked it).
2. Press Alt+PrtSc+?
3. Voila!

Actual Results:
The short help message is printed and any other key begins to be interpreted as
Alt+PrtSc+?

Expected Results:
The short help message is printed and nothing else should happen.

Additional Information:
The machine has Asus P3B-F motherboard (100Mhz) and BTC 5126T PS/2 keyboard (but
this is probably irrelevant).