Re: [Xen-users] No video display, SuSE kernel-xen-2.6.11.4-21.7

[Robbie Dinn <robbie@xxxxxxxxxxxx>]

Hello Ian

Ian Pratt wrote:
>  
>  
>
> > This is a strange one. On upgraging to SuSE 
> > kernel-2.6.11.4-21.7, I have suddenly found that I loose the 
> > video on boot up! The video disappears very early in boot, 
> > possibly while Xen hypervisor is starting, printing out the 
> > physical memory map.
>
> > I have also tried a xen-2.0-testing that I compiled myself 
> > (with the rev 1.1899 "Ensure we only handle writable 
> > pagetable faults taken in guest kernel") Same outcome
>
> Odd. Please can you try the kernel that shipped with Xen 2.0.5 to see if
> we can narrow down when the issue was introduced.
I have down loaded various sources and binaries from both
www.cl.cam.ac.uk and from www.suse.de/~garloff/linux/xen/ .
I will try various combinations of these tonight.

> Are you sure you haven't got any vga related settings in your grub
> config that may have changed?
I don't remember making any changes to the grub config, other than
specifying different xen image or dom0 kernels or dom0 root images.

Specifically I don't have a linux kernel vga=whatever command line
parameter. I believe I have been using the ordinary VGA text mode
console, not a vesa framebuffer and not one of the vga chipset
specific framebuffer drivers either ( at least not intensionally).

Part of the reason I don't use the VESA frame buffer is that I can
never remember numbers for the modes.

> What graphics card do you have?
Ah, well we are a hardware manufacturer, so we have quite a few
different types! I have to beg from from the other engineers to get
access to them though.

I have just been looking through the xen documentation to what
other command line parameters there are for xen and linux.

xen's console=
I don't have this set currently. The default looks sensible,
but maybe I should try one of the other settings?

linux's console=
I tried console=tty0 at David Barrera's suggestion, no joy though.

linux's xencons=
I am not sure I understand from the description what this does
or if it is of interest.

Robbie Dinn

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