[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-users] [Xen-devel] Cannot start Fedora 19 HVM domU with VGA passthru

On 18/07/2013 16:46, Gordan Bobic wrote:
On Thu, 18 Jul 2013 16:37:34 +0800, "Singapore Citizen Mr. Teo En Ming (Zhang Enming)" <singapore.mr.teo.en.ming@xxxxxxxxx> wrote:

Although Fedora 19 HVM domU with VGA passthrough cannot start, Debian
7.1.0 amd64 HVM domU with VGA passthrough can start. In Debian 7.1.0
amd64 HVM domU with VGA passthrough, Intel HD Graphics 4600 is listed
in lspci -vvv. Please refer to lspci.txt. It is strange that no kernel
module is being loaded for Intel HD Graphics 4600. There is no "Kernel
driver in use" statement after VGA compatible controller: Intel
Corporation Haswell Integrated Graphics Controller (rev 06) (prog-if
00 [VGA controller]).

No kernel driver is seen in lsmod. Please refer to lsmod.txt

When I tried to load the kernel module by executing "modprobe i915",
it complains "no such device".

ERROR: could not insert 'i915': No such device

So is my Intel HD Graphics 4600 VGA Passthrough to Debian 7.1.0 amd64
HVM domU considered successful since the i915 driver cannot be loaded?

Thank you very much.

If you have a driver in dom0 claiming the device (other than the xen-pciback
driver), you cannot pass through that device. If you do lspci -ccc on F19
and you see the driver in use for that device being something other than
xen-pciback, that would explain why you can't pass it through.

Also, did you first do xl pci-assignable-add for that device? This attempts
to detach the device from it's current driver but doesn't always work
especially for GPUs. The only solution is blacklist the driver for the
device in dom0. The downside is that you cannot run a GUI in dom0 on that


Dear Gordan,

I cannot start Fedora 19 HVM domU with VGA passthrough at all. Could you advise me on the workaround?

As for the Intel HD Graphics (i915) driver, I have it blacklisted in /etc/modprobe.d/blacklist.conf already. Please refer to attached blacklist.conf.

Thank you very much.

Yours sincerely,

Singapore Citizen Mr. Teo En Ming (Zhang Enming)

Attachment: blacklist.conf
Description: Text document

Xen-users mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.