system frozen and mouse problem

[Klaus Becker <colonius@free.fr>]

Hi,

I have new passwords and new problems:

- I updated Debian 8 without any problem, but:

- the mouse and the mousepad of the iBook G4 will not work. Sometimes after 
system start they work some seconds, than the computer is completely frozen, I 
can only restart it.

- how to write a pipe "|", for ex. "dmesg | grep firewire"? (I saw boot hang 
some time with a message about firewire)

- I suppose there is a hardware problem, but I am not sure. I tried another 
(usb) mouse and I had the same problem. I also tried the 2 usb connections.

cheers

Klaus