On Tue, May 03, 2011 at 11:28:14AM +0800, Wei Liu wrote:
> On Mon, May 2, 2011 at 10:10 PM, Konrad Rzeszutek Wilk
> <konrad.wilk@xxxxxxxxxx> wrote:
> > On Mon, May 02, 2011 at 07:31:21PM +0800, Wei Liu wrote:
> >> I test with various command line options, along with Konrad's  and
> >> Jeremy's  kernel. It's still blank.
> > For the Intel graphic cards to work, you need CONFIG_DMAR to be set.
> > Do you have that?
> >> Konrad's kernel is 2.6.39-rc4, runs well on bare metal, blank screen
> >> on Xen unstable.
> > I am 99% sure you have forgotten to set CONFIG_DMAR?
> Actually I have set CONFIG_DMAR.
> > For that, try 'debug loglevel=8 console=hvc' on your Linux line to make
> > sure that the output
> > is being piped through to the Xen hypervisor.
> > And on the Xen hypervisor do have 'console_to_ring'
> I've added those debugging options in the first place. Here is my
> kernel dmesg output.
Hmm, not seeing the drm messages. Did you compile with the CONFIG_DRM_I915_KMS=y
Also you might want to run with 'drm.debug=255' just to see where it stops
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