Comment 19 for bug 392692

Mine is 0.126, from the following it seem like you should update:

acpi-support (0.126) karmic; urgency=low

  * Drop events/panasonic-brightness-{down,up}, events/panasonic-mute,
    events/panasonic-volume-{down,up}, and panabright.sh, confirmed to be
    implemented now by the panasonic-laptop kernel driver.

Now for the module loading, there is a "MAT0019:00" which matches the module alias
"alias: acpi*:MAT0019:*"
I need to check with the udev rules and will update about that later. Could you try to update your acpi-support package and see whether that with the module loaded is working as expected?