On 9/29/2015 7:19 PM, Meng Xu wrote: > HI Andy, > > 2015-09-29 18:06 GMT-04:00 Andy Smith >: > > Hi Tianyang, > > On Mon, Sep 28, 2015 at 10:24:15PM -0400, soapcn wrote: > > I keep getting this error about not being able to get domain type > > when I try to create a domU. > > Xen-4.7, Ubuntu 12.04 > > I also had this problem recently with regard to some Ubuntu 12.04 > domUs, but on Xen 4.4.1, Debian jessie. These domUs worked fine on > earlier versions of Xen. I searched around a lot and found a few > other people with the same problem, but no answers. > > In the end I discovered that these domUs were using the > linux-image-virtual kernel package instead of the more usual > linux-image-generic. I installed linux-image-generic and > uninstalled linux-image-virtual, and then the affected domUs would > boot. > > I note also that I have some domUs with Ubuntu 12.04.01 using > linux-image-virtual and these are okay. So I assumed whatever > problem there was with that kernel was rectified by the time of the > 12.04.01 release. > > I hope that helps you. > > > Thank you very much for your suggestions! ​ > > ​After Tianyang changed the netboot image used to ​boot the domU, the > error disappears. > So it is likely that the linux-image provided by the ubuntu archive > that he uses is kind of broken. > > It is glad to know that it is not Xen's problem. :-) > > ​Best regards,​ > > ​Meng​ > > > > ----------- > Meng Xu > PhD Student in Computer and Information Science > University of Pennsylvania > http://www.cis.upenn.edu/~mengxu/ Andy, I really appreciate for your suggestions. Like Meng said, there is something wrong with the netboot image(precise) from archive.ubuntu.com. I downloaded one couple weeks ago and it worked. It's the most recent one that's broken and it's not Xen's problem. For the record, I didn't do further testing but images from these two won't work. http://mirror.pnl.gov/ubuntu/... http://archive.ubuntu.com/ubuntu/... Tianyang