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Re: [Xen-devel] X under dom0



> X (Xorg-x11) fails under dom0 (unstable-tree) on my environment.
> If it works for me, it's very appreciated.
> 
> <Symptom>
>  - X fails with the message 
>   ...(snip)
>   (II) VESA(0): initializing int10
>   (EE) VESA(0): Cannot map SYS BIOS


The VESA Xorg/xfree86 driver is not currently supported under
Xen/Linux. Most chipset specific drivers should work fine, and
typically work better anyhow.

Support VESA drivers doesn't work for two reasons: 1) it tries to
map pages in the bottom megabyte of machine memory, and 2) it
needs to make call backs to the BIOS. #1 is trivially
implemented, and it might make sense for dom0 to have access to
the bottom megabyte of machine memory for other reasons
(e.g. ACPI). I don't know enough about the mechanism used for
protected mode BIOS calls to know how best to implement them, but
I suspect we'd have to bounce them via Xen. 

Anyhow, can you try a chipset specific driver?

Thanks,
Ian


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