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[Xen-devel] PVOPS dom0 requires nomodeset to boot but video requires mod

To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] PVOPS dom0 requires nomodeset to boot but video requires modesetting driver
From: "John McDermott (U.S. Navy Employee)" <john.mcdermott@xxxxxxxxxxxx>
Date: Fri, 27 May 2011 08:50:45 -0400
Delivery-date: Fri, 27 May 2011 06:48:31 -0700
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Xen Users,

In trying to bring up a new machine, I have debugged to the point that it 
appears that nomodeset is required to boot a pvops dom0 on Xen 4.0.1, on this 
machine (otherwise a udevd failure), but the video will not work without KMS, 
i.e. dom0 gets a "No modesetting driver detected" error. Everything in dom0 
works fine remotely, including X forwarding, but no GUI on the console. I have 
tried all combinations of iommu, nomodeset, and nopat. I have also tried 
intel_iommu=igfx_off, without changing the results.

Any suggestions?


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

J.P. McDermott                  building 12
Code 5542                       mcdermott@xxxxxxxxxxxxxxxx
Naval Research Laboratory       voice: +1 202.404.8301
Washington, DC 20375, US        fax:   +1 202.404.7942

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