Xen 4.2 Dom0+fglrx=?

Question

Xen

The title is the whole question.
There is Ubuntu 13.04 x64, it has Xen 4.2, and the latest driver from AMD.
During normal boot, everything is fine, when booting into Dom0 - a black display, and does not react to anything, you can’t even enter the terminal, it turns off with a button on the system unit.
With open firewood, everything is fine, with Xen 4.1 everything is the same as with 4.2.
I did not find anything interesting in the logs.
The kernel from the 3.8 repositories, compiled from the 3.8-rc4 sources - nothing changes.
On the net they write about this that fglrx should work with Xen, but they constantly recommend switching to open drivers. How to start did not find.
UPD 05/12/2013:
The system runs on Ubuntu 13.10 with kernel 3.8-3.9, but without Unity (OpenGL does not work). With the 3.10-rc1 kernel, it freezes when you try to start X from the terminal, initially they do not start. Apparently, the situation is changing, let's wait for the support of kernels above 3.8

Answer 1

This is not possible in 3.x kernels (there are custom kernels for 2.6.x).

Answer 2

General advice for debugging zen and system stuff:
1) Serial port.
2) netconsole in Linux. Allows you to see dmesg live. (it is necessary to hang up on the interface, instead of on the bridge, it is actual for xen'a).