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Re: [Xen-devel] Has Anyone Been Able to Run PVOPS DomU Against any nVidi

To: xen-devel@xxxxxxxxxxxxxxxxxxx, "John McDermott \(U.S. Navy Employee\)" <john.mcdermott@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] Has Anyone Been Able to Run PVOPS DomU Against any nVidia Chipset?
From: Boris Derzhavets <bderzhavets@xxxxxxxxx>
Date: Sat, 18 Sep 2010 04:24:26 -0700 (PDT)
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> Does pvops require an ATI chipset?

It just works fine with Radeon HD 4650.


--- On Fri, 9/17/10, John McDermott (U.S. Navy Employee) <john.mcdermott@xxxxxxxxxxxx> wrote:

From: John McDermott (U.S. Navy Employee) <john.mcdermott@xxxxxxxxxxxx>
Subject: [Xen-devel] Has Anyone Been Able to Run PVOPS DomU Against any nVidia Chipset?
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Date: Friday, September 17, 2010, 12:53 PM

Xen Developers,

This has already been posted to Xen-Users, but  I got no response.

Short version: has anyone been able to run a PVOPS domU, on Xen 4.0.1, on Fedora 13, against any nVidia chipset? I'd like to know which chipset please.

Long version:

I have encountered what appears to be an interesting video or DRM problem with this combination.   Dom0 runs X11 without problems but this combination will not run X11 as dom U. While attempting to install Fedora 13 dom U as an HVM, using a PVOPS dom0, running on Xen 4.0.1 on Fedora 13,  using virt-install --nographics, it reaches the point following the XML display of the boot guest configuration, reports an

(EE) FBDEV(0): FBIOBLANK: Invalid argument

error and then hangs with garbage displayed on my remote xterm console. (Virt-install --vnc dies also.) My serial console shows a bunch of hypervisor

(XEN) HVM2: int13_harddisk: function 41, unmapped device for ELDL=81

and then some

(XEN) vlapic.c:702:d2 Local APIC Write to read-only register 0x30

error messages.

I can get a pvops domain U to install --nographics, but the resulting guest cannot start X and fails with the same "(EE) FBDEV(0): FBIOBLANK: Invalid argument". No hypervisor error messages are generated by this failure.

I have tried to get this kernel-hypervisor combination working on 2 different boxes:

1)  a Dell Precision 690 with an Intel E6320 processor (I don't think this is the issue) and an nVidia Quadro NVS 285, which X11 reports as nVidia NV 44. Plain old Fedora 13 uses the nouveau driver with no problems. Udev tells me it is version 153. The problem remains even with the kernel booted nopat.

2) a "roll-your-own" with EVGA X58 SLI motherboard / Intel i7 combination, with an nVidia GEForce 9800 GTX+, which X11 reports as nVidia G92. Again, plain old Fedora 13 uses the nouveau driver for this, without problems. Trying a pvops domU gives me the same behavior: Fedora domU installs and runs fine, but cannot start X11.

I have tried this against 2 kernels: Jeremy's e6b92c and Michael Young's (The latter fails in video during kernel boot, when I use init=/sbin/upstart, but boots OK without it, but then fails to run X on domU's.) When building these kernels, both complain about missing the nouveau module at depmod time.

Before I go swapping cards or outright buying one, has anyone run this pvops combination against any nVidia-based graphics card? Does pvops require an ATI chipset? Has pvops been run against an onboard Matrox chipset, as on a server?


What is the formal meaning of the one-line program
#include "/dev/tty"

J.P. McDermott                building 12
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