mine does that too only when i first start it and not all the time. it only actually stalled once. common problem on the 328. i heard every story from VANOS to the idle control to CCV. my next step is to get the 20 pin cable and the diagnostic software.if i come up with something i will post it.
You start with a base install and add each and everything you would want to it. I have been using it for the past year and a half without any of the problems listed here. If you are new to linux i cannot stress it enough to build it in virtual at least once. so far i have found everything that ubuntu or mint offers in either official or the AUR and every problem has been answered by the wiki or combing thru forum entries.