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[Xen-users] Nvidia drivers in Dom0 results in blank screen

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Nvidia drivers in Dom0 results in blank screen
From: Brandon Turner <bturner@xxxxxxxxxx>
Date: Tue, 15 Dec 2009 10:40:47 -0600
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Hello all,

This is my first post to the list.  I am fairly new to Xen.  Recently I
decided to try and get Xen running on my desktop to try out some new
Linux distributions and play around with the Xen HVM stuff.  I am trying
to get the Nvidia binary drivers working on my Ubuntu Dom0.  I have seen
several pointers on the internet, and in this list's archives,
describing some success in getting the Nvidia drivers to work properly.

Currently, when booting Dom0 the nvidia driver is loaded (no EE messages
appear in xorg.0.log) but my screen is blank.  Actually my screen is in
power-save mode.  I am unable to switch to the text console via
Ctl+Alt+F1.  Killing the X server does not bring my screen back.  I can
still log in via SSH, but the only way to get the screen out of
power-save is to reboot the box.  If I use the nv driver, I am able to
use X and switch consoles.  If I boot the exact same kernel without Xen,
I am able to use the Nvidia drivers and switch consoles with no problems.

I am currently running:
Ubuntu 9.10 (with Grub2) x86_64
A custom built kernel
Latest Nvidia drivers (I have tried 190.42 and 195.22 beta)
GeForce 8600 GTS graphics card

I used the kernel sources at
git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git to build my
kernel and installed xen from source using make install-xen, make
install-tools, make install-stubdom.

I installed the Nvidia drivers using:
-DNV_SIGNAL_STRUCT_RLIM" ./NVIDIA-Linux-x86_64-###.##-pkg2.run

Does anyone have any suggestions I might try?  I have compared the Xorg
logs between booting the kernel without Xen and booting the kernel with
Xen and they look almost the same (dates changed, but everything else
identical).  I am not passing a vga parameter to the kernel.  I can't
understand why once X is started with the Nvidia drivers I lose my
monitors, even if I kill X or try to switch to a text console.

Thanks in advance for any help!

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