kernel crash when using USB keyboard

Hi ,
I am working on 2.4.19-rmk7-pxa1 kernel with epson 13506 chip for my
CRT.I am getting the logo and also login prompt. when i plug in USB key and try to type ,kernel crashes and i dont see any activity on the screen.i.e. the cursor stops blinking. what could be worng ? how can i use keyboard to login. I have enabled my FB device also and my CRT driver get registers with framebuffer. I can echo using tty0 on CRT.

any pointers on where to get more info.

Thanks in advance,
Ramprasad

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