[Xen-API] xen 4.0.0 dom0 console video unreadable / scrambled

[michael dye <dye.michael@xxxxxxxx>]

I am following http://www.gentoo.org/doc/en/xen-guide.xml to build a new
box for use as dom0.  For the dom0 kernel configu I used as a basis a
previous, working config from a non-xen kernel.  That previous kernel
(2.6.32-gentoo-r7) exhibits no console video problem.  My new xen
kernel, however, displays suitable console output as it boots the xen
kernel, but when it boots the dom0 kernel I compiled, the video turns to
a multicolored, unreadable scramble.  Here are the relevant details of
my configuration:

xen-enabled kernel version 2.6.32 (from sys-kernel/xen-sources 2.6.32-r1)
xen 4.0.0 (from app-emulation/xen-4.0.0)
xen-tools 4.0.0 (from app-emulation/xen-tools-4.0.0)

# cat /boot/grub/grub.conf
default 0
timeout 10

title Gentoo Linux 2.6.32-xen-r1-a + xen 4.0.0
root (hd0,0)
kernel /boot/xen-4.0.0.gz dom0_mem=512M loglvl=all guest_loglvl=all
sync_console console_to_ring com1=115200,8n1 console=com1 lapic
apic_verbosity=debug apic=debug iommu=off
module /boot/linux-2.6.32-xen-r1-a ro root=/dev/sda3 console=hvc0
earlyprintk=xen nomodeset initcall_debug debug loglevel=10

I have an intel 82915G/GV/910GL graphics card so I configured AGP_INTEL,
DRM, FB, FB_BOOT_VESA_SUPPORT, FB_VGA16, FB_UVESA, FB_VESA, VGA_CONSOLE,
FONTS, FRAMEBUFFER_CONSOLE, and DUMMY_CONSOLE into the kernel.  What am
I missing or screwing up?  Thanks.

-mike d.

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