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xen-users
Re: [Xen-users] X server in a domU, with pci access and no X in dom0
i've just reread the whole thread - it seems to me your problem is more
with virtual consoles than grafix card isn't it?
what distro did you install in the domU? do you have the devices
/dev/ttyN in your DomU filesystem? could you post your /etc/inittab from
DomU please?
cheers
galileon.
Nawal Husnoo wrote:
hello all,
(sorry for the first blank fwd:..., i clicked on send by accident
before typing the message - good thing it was not the global
thermonuclear war button from wargame)
I just got NVIDIA drivers to work under Dom-0 in ubuntu linux
yesterday, and as i havent yet produced a tutorial for it and you only
need the nvidia anyway, ill explain only this
1) configure and install your xen kernel, if its dom-0 boot into it,
(yours is domU, so you boot that virtual machine)
2) download the patch from halfway down the screen in this link
http://www.nvnews.net/vbulletin/showthread.php?t=68648
3) copy-paste the script from further down the page, then you need to
adjust the script, only the first two lines need to change to reflect:
your nvidia-binary-you-got-from-nvidia.com,
your kernel version, ie uname -r
you dont need to change anything in the patch itself, just leave
everything as it is, even the bits about 1.0-8756 (remember we're
probably dealing with the latest driver, ie 8762)
eg, my first three lines:
NVIDIA=NVIDIA-Linux-x86-1.0-8762-pkg1.run
KERNEL=2.6.16.13-xen
PATCH=patch-nv-1.0-8756-xen-3.0.2-2.txt
now copy the NVIDIA-binary, patch, and script to /usr/src
and make sure you have a link in /usr/src/linux which points to your
linux kernel source tree (not your xen source) eg for me its
/homes/ubuntu/xen/xen-3.0-testing/linux-2.6.16.13-xen/
just execute the script, and it should produce the kernel module...
at this point, my notes are a bit dark, and i had to
clean-install-recompile-xen three times to think of trying this:
apt-get install nvidia-glx
apt-get install nvidia-glx-dev
then you do a dpkg-reconfigure xserver-xorg
note the last three lines are for ubuntu/debian, and under another
distro that would simply be install the packages nvidia-glx and
nvidia-glx-dev, and modify
Section "Device"
Identifier "NVIDIA Corporation NV40 [GeForce 6200?]"
Driver "nvidia"
BusID "PCI:1:0:0"
Option "RenderAccel" "true"
EndSection
to include Driver "nvidia" instead of "nv"
i'm not sure if i needed those 2 packages, and if yours works without
them, could you let me know please? i'm too tired of messing with xen
to reinstall just for that - its all working so perfectly now that i
need to get some holiday homework done!!
and could you also let me know if the domU xserver likes the driver as
well, coz i think its a jolly good idea to run the xserver as well in
domU - though you might struggle with your mouse and keyboard as Adam
said...
is your card PCI-Express? mine is, and hopefully the pci bit will
allow xen to pass it through...
good luck,
galileon.
Adam Seering wrote:
Hi,
Right now, in order for graphics cards to work properly, their X
drivers have to be modified to recognize Xen. I don't think this has
been done for any open-source graphics card drivers; there is a way
to get the NVidia binary module to work, but it requires a fair bit
of Googling and kernel and module patching, and things like that. I
was able to follow the instructions at
<http://www.nvnews.net/vbulletin/showthread.php?t=68703>, and with
some tweaking I did get a graphics card to work.
Note that the domU doesn't have physical access to your
hardware. This means, No keyboard and mouse, unless you have a PCI
USB card and you export that card to your domU as well, and configure
X to use them.
Adam
On Aug 22, 2006, at 11:02 AM, nicko.koinkoin@xxxxxxx wrote:
Hi everybody
I try to have a running X server in a domU.
What I want is not to have an X server in dom0, for security
purposes. I know
that it is not an easy thing, but I need it. First I hide the video
card from
dom0, what is working fine. Indeed, lspci in dom0 doesn't show the
video card.
I give direct access to the video card to my domU, thanks to its
configuration
file. But in fact I can't launch my X server. Indeed, during the
boot of my
domU, I got the following error message :
* Loading key mappings ...assuming iso-8859-1 cedilla
assuming iso-8859-1 acute
assuming iso-8859-1 diaeresis
assuming iso-8859-1 brokenbar
assuming iso-8859-1 threequarters
assuming iso-8859-1 currency
assuming iso-8859-1 onehalf
assuming iso-8859-1 onequarter
assuming iso-8859-1 currency
Couldnt get a file descriptor referring to the console
* Error loading key mappings
[ !! ]
* Setting terminal encoding to ASCII
... [ ok ]
* Setting user font ...Couldnt open //dev/vc/1
Couldnt open //dev/vc/2
Couldnt open //dev/vc/3
Couldnt open //dev/vc/4
Couldnt open //dev/vc/5
Couldnt open //dev/vc/6
Couldnt open //dev/vc/7
Couldnt open //dev/vc/8
Couldnt open //dev/vc/9
Couldnt open //dev/vc/10
Couldnt open //dev/vc/11
* Failed to set user font
[ !! ]
So of course when typing startx, I got :
Fatal server error:
xf86OpenConsole: Cannot open /dev/tty0 (No such device)
I use Gentoo Linux with kernel 2.4.30 as my domU (the same for dom0,
but there
is no error messages during dom0 boot), the configuration file of my
domU is:
kernel = "/boot/vmlinuz-2.4.30-xenU-basic"
memory = 128
name = "domU"
nics = 1
vif = ['mac=aa:00:00:00:00:d2, bridge=xen-br0']
disk = ['phy:/dev/hda5,hda1,w',
'phy:/dev/hda6,hda2,w']
root = "/dev/hda1 ro";
#extra="xencons=ttyS console=tty0"
extra="console=tty0"
pci=['02,00,0']
I also try to append the same options to my domU kernel as the ones
of dom0, but
thus no console is available during boot, so no display at all.
Please let's me know if what I try is a crazy thing, or if someone
has already
suceeded in having a running and usable X server in a domU with no X
in dom0,
or if it can be a Gentoo specific error due to devfs.
Thanks a lot.
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