No answer for you, sorry, but for what it's worth, I'm experiencing the same issue. That is, booting into a Xen kernel, xwindows startup hangs. Booting into a generic kernel, and all is good, I get gdm and X, can log in, and in fact, create this forum post. :-)
I've just now installed the ubuntu-xen-server on an up to date ubuntu 8.04 AMD x86_64:
pjs11@patslinux01:~$ dpkg-query --list | grep -i xen
(...trimmed for brevity...)
ii libxen3 3.3.0-1ubuntu7~hardy1
ii linux-image-2.6.24-23-xen 2.6.24-23.48
ii linux-restricted-modules-2.6.24-23-xen 2.6.24.16-23.56
ii linux-ubuntu-modules-2.6.24-23-xen 2.6.24-23.36
ii python-xen-3.3 3.3.0-1ubuntu7~hardy1
ii xen-hypervisor-3.3 3.3.0-1ubuntu7~hardy1
ii xen-utils-3.3 3.3.0-1ubuntu7~hardy1
When I boot with Xen, I get to the point of gdm startup, whereupon the startup hangs, (Fortunately, it's already started ssh by then, so I can log in) My /var/log/gdm/:0.log reads thusly:
pjs11@patslinux01:~$ more /var/log/gdm/\:0.log.1
(...snip copyright notices...)
X.Org X Server 1.4.0.90
Release Date: 5 September 2007
X Protocol Version 11, Revision 0
Build Operating System: Linux Ubuntu (xorg-server 2:1.4.1~git20080131-1ubuntu9.2)
Current Operating System: Linux patslinux01.mayo.edu 2.6.24-23-xen #1 SMP Mon Jan 26 03:09:12 UTC 2009 x86_64
Build Date: 13 June 2008 01:10:57AM
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Module Loader present
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Tue Feb 17 14:45:06 2009
(==) Using config file: "/etc/X11/xorg.conf"
(WW) intel: No matching Device section for instance (BusID PCI:0:2:1) found
(II) Module "ddc" already built-in
(II) Module "i2c" already built-in
(EE) intel(0): Unable to write to SDVOCTRL_E for SDVOB Slave 0x70.
(II) Module "ramdac" already built-in
(WW) intel(0): Failed to set up write-combining range (0xd0000000,0x10000000)
And that's it, no more output. I should note I see the same message "Failed to set up write-combining range (0xd0000000,0x10000000)" when booting into a generic kernal and getting a successful gdm and x session.
And my machine hardware is a Dell Optiplex 755, with an Intel(R) Core(TM)2 Duo CPU and 8GB of ram. lspci on this box looks like this:
pjs11@patslinux01:~$ lspci -v
00:00.0 Host bridge: Intel Corporation 82Q35 Express DRAM Controller (rev 02)
Subsystem: Dell OptiPlex 755
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
00:02.0 VGA compatible controller: Intel Corporation 82Q35 Express Integrated Graphics Controller (rev 02) (prog-if 00 [VGA controller])
Subsystem: Dell OptiPlex 755
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at fea00000 (32-bit, non-prefetchable) [size=512K]
I/O ports at ec90 [size=8]
Memory at d0000000 (32-bit, prefetchable) [size=256M]
Memory at feb00000 (32-bit, non-prefetchable) [size=1M]
Capabilities: <access denied>
00:02.1 Display controller: Intel Corporation 82Q35 Express Integrated Graphics Controller (rev 02)
Subsystem: Dell OptiPlex 755
Flags: bus master, fast devsel, latency 0
Memory at fea80000 (32-bit, non-prefetchable) [size=512K]
Capabilities: <access denied>
00:03.0 Communication controller: Intel Corporation 82Q35 Express MEI Controller (rev 02)
Subsystem: Dell OptiPlex 755
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at fedad000 (64-bit, non-prefetchable) [size=16]
Capabilities: <access denied>
00:03.2 IDE interface: Intel Corporation 82Q35 Express PT IDER Controller (rev 02) (prog-if 85 [Master SecO PriO])
Subsystem: Dell OptiPlex 755
Flags: 66MHz, fast devsel, IRQ 18
I/O ports at fe80 [size=8]
I/O ports at fe90 [size=4]
I/O ports at fea0 [size=8]
I/O ports at feb0 [size=4]
I/O ports at fef0 [size=16]
Capabilities: <access denied>
00:03.3 Serial controller: Intel Corporation 82Q35 Express Serial KT Controller (rev 02) (prog-if 02 [16550])
Subsystem: Dell OptiPlex 755
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 17
I/O ports at ec98 [size=8]
Memory at fe9da000 (32-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
00:19.0 Ethernet controller: Intel Corporation 82566DM-2 Gigabit Network Connection (rev 02)
Subsystem: Dell OptiPlex 755
Flags: bus master, fast devsel, latency 0, IRQ 509
Memory at fe9e0000 (32-bit, non-prefetchable) [size=128K]
Memory at fe9db000 (32-bit, non-prefetchable) [size=4K]
I/O ports at ecc0 [size=32]
Capabilities: <access denied>
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 02) (prog-if 00 [UHCI])
Subsystem: Dell Optiplex 755
Flags: bus master, medium devsel, latency 0, IRQ 16
I/O ports at ff20 [size=32]
Capabilities: <access denied>
00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 02) (prog-if 00 [UHCI])
Subsystem: Dell Optiplex 755
Flags: bus master, medium devsel, latency 0, IRQ 17
I/O ports at ff00 [size=32]
Capabilities: <access denied>
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 02) (prog-if 20 [EHCI])
Subsystem: Dell Optiplex 755
Flags: bus master, medium devsel, latency 0, IRQ 22
Memory at fe9d9c00 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02)
Subsystem: Dell Optiplex 755
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at fe9dc000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 02) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
Memory behind bridge: fe800000-fe8fffff
Capabilities: <access denied>
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 02) (prog-if 00 [UHCI])
Subsystem: Dell Optiplex 755
Flags: bus master, medium devsel, latency 0, IRQ 23
I/O ports at ff80 [size=32]
Capabilities: <access denied>
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 02) (prog-if 00 [UHCI])
Subsystem: Dell Optiplex 755
Flags: bus master, medium devsel, latency 0, IRQ 17
I/O ports at ff60 [size=32]
Capabilities: <access denied>
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 02) (prog-if 00 [UHCI])
Subsystem: Dell Optiplex 755
Flags: bus master, medium devsel, latency 0, IRQ 18
I/O ports at ff40 [size=32]
Capabilities: <access denied>
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 02) (prog-if 20 [EHCI])
Subsystem: Dell Optiplex 755
Flags: bus master, medium devsel, latency 0, IRQ 23
Memory at ff980800 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 92) (prog-if 01 [Subtractive decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=02, subordinate=02, sec-latency=32
I/O behind bridge: 0000d000-0000dfff
Memory behind bridge: fe600000-fe7fffff
Capabilities: <access denied>
00:1f.0 ISA bridge: Intel Corporation 82801IO (ICH9DO) LPC Interface Controller (rev 02)
Flags: bus master, medium devsel, latency 0
Capabilities: <access denied>
00:1f.2 SATA controller: Intel Corporation 82801IR/IO/IH (ICH9R/DO/DH) 6 port SATA AHCI Controller (rev 02) (prog-if 01 [AHCI 1.0])
Subsystem: Dell Unknown device 0211
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 510
I/O ports at fe00 [size=8]
I/O ports at fe10 [size=4]
I/O ports at fe20 [size=8]
I/O ports at fe30 [size=4]
I/O ports at fec0 [size=32]
Memory at ff970000 (32-bit, non-prefetchable) [size=2K]
Capabilities: <access denied>
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 02)
Subsystem: Dell Optiplex 755
Flags: medium devsel, IRQ 9
Memory at fe9d9b00 (64-bit, non-prefetchable) [size=256]
I/O ports at ece0 [size=32]
02:00.0 SCSI storage controller: LSI Logic / Symbios Logic 53c895 (rev 02)
Subsystem: LSI Logic / Symbios Logic LSI8952U PCI to Ultra2 SCSI host adapter
Flags: bus master, medium devsel, latency 72, IRQ 16
I/O ports at dc00 [size=256]
Memory at fe6fef00 (32-bit, non-prefetchable) [size=256]
Memory at fe6ff000 (32-bit, non-prefetchable) [size=4K]
Expansion ROM at fe600000 [disabled] [size=128K]
Can anyone offer advice, please?
Thanks,
-- Pat