Hello, I can trigger this oops from a user program running from a non priviledged account : dos -A (dosemu). It kills the kernel in an interrupt routine so I have to transcribe the oops from the dump on-screen :-) There are two ksymoops results attached. Configuration : PIII 550 MHz 256MB RAM Intel 440 chipset + HPT343 ide (IDE CD writer and CD connected to HPT343). RH7.1 - 2.4.7 ac7 and ac11 NVidia 32Meg Geoforce II. The crash only occurs if X (Gnome) is running, I suspect the applet which pools the CD drives might trigger the OOPS. It seems that it has something to do with the end of the transaction on the ide-scsi CR R/W. Let me know if you need more info. I am not not the list, please copy me on the answer ... Keep the good work ! Francois Francois.lorrain@attglobal.net