My DarU1 is really stable in Intrepid.
OK, where are we with this one? Did you do a fresh install? If not here's some starting points:
For your wireless, please follow these instructions:
To fix your /etc/network/interfaces file, go to a terminal
(Application > Accessories > Terminal) and enter the following command:
sudo gedit /etc/network/interfaces
This will launch a text editor with the interfaces file opened in it.
In this file, put a comment (#) in front of EVERY line of the file EXCEPT for these two lines:
auto lo iface lo inet loopback
Click SAVE on the text editor and reboot your computer. It should now boot faster and connect to networks more easily.
NOTE: Unless you are dealing with static IP addresses (which is pretty rare for the general end-user) you should NOT establish a network connection by going to System > Administration > Network.
Instead, you should connect to the Internet using the Network Manager icon in the upper right corner of your screen (the one that looks like a little computer monitor).
For the volume knob, this worked in Hardy and works in Intrepid. I think there was a fix for that in the System76 driver. However, there have been some major keymapping snafus in Intrepid, and it may be affecting that knob on your computer. Let's try the driver first, though. Here are instructions for installing/running the latest version:
To install the System76 Driver, navigate to http://planet76.com/repositories and download the latest .deb package. It will be the one closest to the bottom of the page. Save the package to your Desktop and, when it has finished downloading, double-click it to launch the Gdebi installer. Then, click the install button.
Once the package has installed, you can open the System76 driver by going to System > Administration > System76 Driver. To install the drivers for your machine, Click the "Install" tab and the "Install" button. If you are restoring your machine to factory settings, Click the "Restore" tab and the "Restore" button.
When the driver has finished running, reboot your computer.
As for the random logouts, the next time it happens, log back in and open the System76 Driver and click the "Support" tab and the "Create" button. This will create an archive of log files in your home directory that you can send to us as an email attachment to support(at)system76(dot)com.