The question can clearly answered with yes. The slight confusion was that during all the comments it was not clear to me whether the Quantal kernel was indeed used without or with the dom0_mem option. I took Mike's comment as if it was only *with* this option. Personally I find the usage of "unusable" for used memory slightly confusing but it would then not be the issue.
So if Quantal works even without that option, could you attach the dmesg of a Xen boot on that machine. Probably the difference in output helps to find out which changes make it work.
The question can clearly answered with yes. The slight confusion was that during all the comments it was not clear to me whether the Quantal kernel was indeed used without or with the dom0_mem option. I took Mike's comment as if it was only *with* this option. Personally I find the usage of "unusable" for used memory slightly confusing but it would then not be the issue.
So if Quantal works even without that option, could you attach the dmesg of a Xen boot on that machine. Probably the difference in output helps to find out which changes make it work.