Hi all,
I am a new user of SW.
On close down of kde4 I get the following error message;

'Waiting for X server to shutdown kde4: fatal IO error; client killed error setting MTRR (base=0xf0000000, size=0x04000000, type=1) invalid argument (22)

Because of this error I am currently closing down using
"shutdown -h(-r) now"
Could I please have some help on correcting the error.

I have only a meagre experience with linux having only dabbled with it over the years so could you please elaborate on the details for a corrective approach.

Thank you very much for your help.

This may sound strange but do you have a dvd or cdrom in the cdrom drive. or some usb device plugged in. if not it is a xwindow program that is not terminating.