Re: Failure to start X windows in Dom0 under Xen 4.1.2

[Konrad Rzeszutek Wilk <konrad@darnok.org>]

On Tue, Dec 20, 2011 at 09:25:21AM -0500, Konrad Rzeszutek Wilk wrote:
> On Tue, Dec 20, 2011 at 06:44:03AM +0100, Jan Vejvalka wrote:
> > Dear Konrad,
> > 
> >   thank you for your interest.
> 
> Please don't top post.

And do not remove the xen-devel from the CC. I put it back in this
email.

> > 
> > In the meantime, I found a post that helped at least partially:
> > http://forums.gentoo.org/viewtopic-t-901234-start-0.html .
> > 
> > I added the nopat option to grub, and things got a bit better.
> > I moved one step further, now facing a somewhat different problem:
> > 
> > - on my 3.1.1 kernel without Xen, things work fine
> 
> Can you provide the dmesg of that please.
> 
> I am curious to see why you have:
> 
> [    2.967316] [drm] VGACON disable radeon kernel modesetting.
> 
> Can you also boot the baremetal (so without Xen) and with Xen
> with: "drm.debug=255" and remove the "nomodeset" option on the Linux
> command line?
> 
> Uou are also missing the "debug loglevel=8" options. I need those to
> get a better idea of why the radeon driver is not initializing properly.
> 
> > - on the same kernel with Xen, the first (and sometimes even some
> >     further) attempts to run startx fail
> > - after a couple of tries, startx finally succeeds if the kernel
> >     is loaded with the nopat parameter
> > - without the nopat parameter, it seems it does not work: in the best
> >     attempts, the screen enters the graphic mode for a short while
> >     before the final crash.
> > 
> > The info you asked for is at
> > http://camelot.lf2.cuni.cz/vejvalka/temp/kon .
> > 
> > Thanks for help
> > Dziekuje bardzo
> 
> Oczywiscie.