[SLE] Xen for a dummy (me)

Today I set out to learn Xen. I have SuSE 10.1 (64 bit), up-to-date via zmd,
on a Dell Precision 490 (2 Dual-core Xeons). Among other documentation, I
read what I could find at http://en.opensuse.org/Installing_Xen3. I then
proceeded by Enabling Xen in Yast2 and rebooting. (During the reboot I took a
detour through my BIOS setup and enabled Virtualization Support.) In GRUB, I
select the default XEN kernel and booted.

1) My graphical boot turned textual. No big deal, but why?
2) The boot was roughly three times slower than usual. ??
3) X didn't start. After a seemingly normal start, Xorg.0.log ends with:

(**) NVIDIA(0): Depth 24, (--) framebuffer bpp 32
(==) NVIDIA(0): RGB weight 888
(==) NVIDIA(0): Default visual is TrueColor
(==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
(**) NVIDIA(0): Enabling RENDER acceleration
(EE) NVIDIA(0): Failed to load the NVIDIA kernel module!
(EE) NVIDIA(0): *** Aborting ***
(II) UnloadModule: "nvidia"
(II) UnloadModule: "ramdac"
(II) UnloadModule: "fb"
(EE) Screen(s) found, but none have a usable configuration.

Fatal server error:
no screens found

4) I have no network devices. Eth0 have failed to start.


After this, I quickly reverted to a normal (non-xen) boot, and all was normal.

(Pfui.) After a lot of google and browsing on the Xen subject, I still don't
understand if I'm doing anything wrong or what else is missing. I guess
nvidia isn't working since the needed kernel module isn't provided for the
xen kernel (I use precompiled nvidia rpms), but on the rest of theproblems I
feel clueless.

Any hints...?

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