Ralf Angeli wrote:
> after updating my Debian/sid system yesterday the mouse stopped working, 
> i.e. the X server starts up normally but the mouse pointer cannot be 
> moved via trackpoint, touchpad or USB mouse (this is on a Thinkpad 
> T41p).  The keyboard is working normally.  My last update was probably 
> two to four weeks ago.
>   

I don't remember any really big X-related update in sid in the last
month, at least regarding the server core and mouse driver.

> Perhaps somebody can help me narrow down the problem.  My idea was to 
> downgrade X packages possibly causing the problem but I am not sure 
> which of them are candidates.  I'm not even sure if it's the fault of X.  
>   

xserver-xorg-core would be the first candidate. Then drivers. Then libs.

> Another suspect could be the kernel but downgrading to 2.6.18 did not 
> change anything.  I also tried a new xorg.conf generated through 
> `dpkg-reconfigure xserver-xorg'.  This did not change anything either.
>   

I would have voted for the kernel too.

> Section "InputDevice"
>       Identifier      "Configured Mouse"
>       Driver          "mouse"
>       Option          "CorePointer"
>       Option          "Device"                "/dev/psaux"
>       Option          "Protocol"              "ImPS/2"
> #     Option          "Device"                "/dev/input/mice"
> #     Option          "Protocol"              "auto"
>       Option          "Emulate3Buttons"       "true"
>       Option          "ZAxisMapping"          "4 5"
> EndSection
>   

Did you try both /dev/psaux and /dev/input/mice?

You could try running "cat /dev/psaux" or "cat /dev/input/mice" as root
while moving the mouse. If the kernel is fine, some ugly characters
should appear in the terminal.

> (EE) AIGLX error: dlopen of /usr/lib/dri/r300_dri.so failed 
> (/usr/lib/dri/r300_dri.so: cannot open shared object file: No such file or 
> directory)
>   

Looks like you need to install libgl1-mesa-dri (unrelated to your problem).

Brice



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