Interesting things (to me). Tim said to look at IT and I have been
doing so. Here is what /etc/X11/xorg.conf has to say about my mouse:
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "Emulate3Buttons" "yes"
Option "ZAxisMapping" "4 5"
EndSection
I decided to look at /dev/input/mice and it has:
[karl@k5di ~]$ ls -al /dev/input/mice
crw-r----- 1 root root 13, 63 2007-12-13 05:26 /dev/input/mice
[karl@k5di ~]$ cd /dev
[karl@k5di dev]$ cd input
[karl@k5di input]$ ls
by-path event1 event3 event5 mice mouse1
event0 event2 event4 event6 mouse0
[karl@k5di input]$ ls -al mice
crw-r----- 1 root root 13, 63 2007-12-13 05:26 mice
[karl@k5di input]$ ls -al mouse0
crw-r----- 1 root root 13, 32 2007-12-13 05:26 mouse0
This appears to be something special. I have no idea what it does to
work but it is different from other /dev/xxx.
I think the way this works is the reason for my sudden failures of
both F7 and F8. I was plugging my mouse into a USB port. It works fine
but I think there is a problem. Looking back the sudden failures may
have begun when I put the mouse into the USB port. I now have the mouse
plugged into a PS2 port and no sudden failures in 3 days.
After a week without problems I will again plug the mouse into a USB
port and see if the sudden failure returns.
Karl