Re: [Xen-devel] intel agp card support 2

[Stijn De Weirdt <stijn.deweirdt@xxxxxxxxx>]

On Tue, 4 Jan 2005 08:34:19 -0700 (MST), Ronald G. Minnich
<rminnich@xxxxxxxx> wrote:
> > (WW) I810(0): Bad V_BIOS checksum
> 
> this is bad. It's a warning but it should not be happening. It means the
> vga bios checksum was wrong. Do you get this if you boot without xen, i.e.
> standard linux?
yes, it's actaully not that unfrequent.
> 
> > (II) I810(0): Primary V_BIOS segment is: 0xc000
> > (WW) System lacks support for changing MTRRs
> > (EE) I810(0): unknown type(0xffffffff)=0xff
> 
i think this is much worse :)

> I forget where this EE comes from, but:
> > (II) I810(0): EAX=0x00004f00, EBX=0x00000000, ECX=0x00000000, EDX=0x00000000
> > (II) I810(0): ESP=0x00000ffa, EBP=0x00000000, ESI=0x00000000, EDI=0x00002000
> > (II) I810(0): CS=0xc000, SS=0x0100, DS=0x0040, ES=0x0000, FS=0x0000, 
> > GS=0x0000
> > (II) I810(0): EIP=0x00000014, EFLAGS=0x00003200
> > (II) I810(0): code at 0x000c0014:
> >  e9 0d 14 27 40 00 b0 0a 30 30 49 42 4d 20 56 47
> >  41 20 43 6f 6d 70 61 74 69 62 6c 65 20 42 49 4f
> > (II) stack at 0x00001ffa:
> >  00 06 00 00 00 32
> > (II) I810(0): VESA BIOS not detected
> 
> As I read this, the module loader tried to run the vga bios and failed, as
> it could not get to the actual BIOS code? That's how it looks to me
> anyway.
> 
> I have no idea: has anyone seen option rom access working under Xen? I
> have not, but I have not tried this recently. The VGA bios ROM is not
> accessible on my laptop, however.
> 
> Does Xen currently allow a guest to set enable the option rom access and
> set the register (0x30 I think) for the option ram base address?
> 
> 
> > (EE) I810(0): VBE initialization failed.
> 
> So you get this error, and ...
> 
> > (II) UnloadModule: "i810"
> > (II) UnloadModule: "int10"
> > (II) UnloadModule: "vgahw"
> > (II) Unloading /usr/X11R6/lib/modules/libvgahw.a
> > (II) UnloadModule: "vbe"
> > (II) Unloading /usr/X11R6/lib/modules/libvbe.a
> > (II) UnloadModule: "int10"
> > (II) Unloading /usr/X11R6/lib/modules/linux/libint10.a
> > (EE) Screen(s) found, but none have a usable configuration.
> 
> it unloads the modules since it can't run the vga bios.
> 
> ron
> 
i've attached a working X.0.log

hopefully this gets resolved soon.

stijn


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