How are you doing the install i use ubuntu on the server that i use my dm2 had a bit of issues but got through it. The dm2 .deb doesn't do the whole install by itself you have to run a couple commands from terminal to get it to work. At least that how it was in previous version of ubuntu i assume its the same in 12.10
Edit: from the readme this should get your dm2 lighting up. I can't remember but you i believe you have to sudo module-assistant commands.
sourceforge.net/projects/dm2linux/Compiling / Installing
========================
1. The Debian / Ubuntu Way
Get the newest dm2-source_<version>_all.deb from sourceforge. Use
the following command sequence as root to build and install the
driver.
# dpkg -i dm2-source_<version>_all.deb
# apt-get install module-assistant
# module-assistant prepare
# module-assistant auto-install dm2
2. The Old-Fashioned Way
Provided you have a recent kernel with header files, you can just
type "make" in the source directory. You should get a dm2.ko
kernel module shortly afterwards.
make
This module can be insmod'ded (as root) or installed directly. To
install, you also need root privileges.
sudo make install
This deposits the module in the "kernel/sound/drivers" section of
your kernel and scans it for USB autodetection.
Mixxx Configuration
=====================
For using the dm2 with mixxx, copy the MIDI mapping files into the
mixxx midi directory:
# sudo cp mixxx/Mixman DM2* /usr/share/mixxx/midi/
For your convenience, there's a PNG there, which shows what
functions are where in the default mapping.
