We are observing a strange effect here under X11 with a 2.4.21-47.EL kernel.
The keyboard repeats single keystrokes in a very unpleasant manner. 
I first thought that it was an issue that can be passed by by setting 
xset -r and then xset -r rate 400 30 but after short it turned out that
the problem did not go away with that. Motherboard is an ASUS A8N-E.


processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 43
model name      : AMD Athlon(tm) 64 X2 Dual Core Processor 3800+
stepping        : 1
cpu MHz         : 2010.338
cache size      : 512 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext lm
3dnowext 3dnow
bogomips        : 4010.80

Anyone having an idea what to do? I also tried a redhat-config-keyboard
to no avail. Other colleages were reporting the same problem. Also 
a BIOS issue could reportedly be the cause. (Typematic feature comes to
mind - don't know at the moment whether this MB has this feature in its
BIOS. Will try that probably next).

--
Chris Christoph P. U. Kukulies kukulies (at) rwth-aachen.de