[coreboot] vga not working

Kevin O'Connor kevin at koconnor.net
Sun Jul 26 15:48:38 CEST 2009

On Sun, Jul 26, 2009 at 01:00:52PM +0200, Arnaud Maye wrote:
> I've been on IRC for a GFX output issue on Friday. Actually the
> output is always black or full of non sense square on the screen. I
> have tried two graphic cards and in this respect it is fair to point
> the issue outside of the vgarom.
> Scan for VGA option rom
> Attempting to init PCI bdf 07:00.0 (dev/ven 42110de)
> Searching CBFS for data file pci10de,0421.rom
> Found CBFS file fallback/payload
> Found CBFS file fallback/coreboot_ram
> Found CBFS file pci10de,0421.rom
> Copying data 58368 at 0xffe17a98 to 196608 at 0x000c0000
> Checking rom 0x000c0000 (sig aa55 size 114)
> Running option rom at c000:0003

How did you obtain the vgabios?  Is this a vga adapter built-in to the
motherboard, or one on an external card?

For vga adapters on external cards, one should not add the vgabios to
CBFS - SeaBIOS can extract the vgabios directly from the card.


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