I am having problems getting my 64-bit Debian Squeeze (Xen version 4.0, Linux
Kernel 2.6.32) dom0 to pass a Gigabyte HD 5450 graphics card to an HVM 64-bit
Arch Linux domU. I have two Gigabyte HD 5450 graphics cards connected to my
Gigabyte GA-X79-UP4 motherboard. I can pass the secondary card (the one the bios
doesn’t show up on) to an HVM 32-bit Windows XP domU (I thought that would be
the hard part, but it was easy with the Xen wiki). For the Linux domU, I cannot
get the VGA passthrough to work.
I started with essentially the same cfg file that worked for Windows. This lead
to an “Expecting atombios for evergreen GPU” warning followed by “Fatal error
during GPU init” in the Linux domU. I installed the AMD proprietary drivers and
the warning and error went away. Both the virtual and physical VGA devices are
listed by lspci in the Linux domU, but I cannot seem to use the physical device.
I then tried to passthrough the primary adaptor. It doesn’t work and I cannot
even start X11/VNC in the dom0 to inspect the domU. I have also tried adding
gfx_passthru=1 to my cfg file and this prevents the domU from booting.
I would appreciate any suggestions as to where to look for problems.
My cfg file is:
name = "Arch"
builder = "hvm"
kernel = "/usr/lib/xen-4.0/boot/hvmloader"
device_model = "qemu-dm"
on_poweroff = "destroy"
on_reboot = "restart"
on_crash = "restart"
memory = 8192
vcpus = 1
vif = [ ''bridge=xenbr0'' ]
disk = [ ''phy:/dev/mapper/vg0-arch,xvda,w'' ]
pci = [ ''01:00.0'', ''01:00.1'' ]
boot = "c"
stdvga = 1
#gfx_passthru = 1
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