upgrade to new xen domU on old xen dom0?

[Josip Rodin <joy@entuzijast.net>]

Hi,

If I try to boot 2.6.32-4-xen-amd64 on a 2.6.26-2-xen-amd64 (lenny) dom0,
it gets stuck at:

[    0.120653] XENBUS: Device with no driver: device/vbd/769
[    0.120658] XENBUS: Device with no driver: device/vif/0
[    0.120663] XENBUS: Device with no driver: device/console/0
[    0.120679] /build/mattems-linux-2.6_2.6.32-10-amd64-Ff7Wwa/linux-2.6-2.6.32-10/debian/build/source_amd64_xen/drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
[    0.120822] Freeing unused kernel memory: 588k freed
[    0.121088] Write protecting the kernel read-only data: 4264k
Loading, please wait...
Begin: Loading essential drivers ... done.
Begin: Running /scripts/init-premount ... FATAL: Error inserting fan (/lib/modules/2.6.32-4-xen-amd64/kernel/drivers/acpi/fan.ko): No such device
FATAL: Error inserting thermal (/lib/modules/2.6.32-4-xen-amd64/kernel/drivers/acpi/thermal.ko): No such device
[    0.610445] blkfront: xvda1: barriers enabled
done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
Begin: Waiting for root file system ...

Can anything be done? I thought the domUs were supposed to be a safe
upgrade?

-- 
     2. That which causes joy or happiness.