xterm keyboard response is slow with recent kernel (regression)

["Toralf Förster" <toralf.foerster@gmx.de>]

When I start a straight X11 session with ctwm (or twm, lwm etc ...) with 
"startx" and type in a command into a xterm, since kernel 2.6.37.4 (and 
2.6.38.1 too) it needs a loooong time until the appropriate pressed key 
appears in the xterm. If I press ENTER however both the command and the output 
appears immediately.
Sometimes the whole command is printed only after I pressed the RETURN key.

Furthermore it needs a much longer time than usual after "startx" until the 
window manager draws the border (incl. the scroll bar) to the terminal, the 
process X is running at 50% (100% of a core) within that time frame.

I've a Lenovo ThinkPad T400 with integrated intel graphic (GM45), xorg-server 
version is 1.9.5

With kernel 2.6.36.4 however there's no problem AFAICS.

-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3