[coreboot] Error executing VGA ROM with coreboot

mansoor at iwavesystems.com mansoor at iwavesystems.com
Fri Oct 30 13:02:03 CET 2009


>
>
>
> On Fri, 30 Oct 2009 10:11:36 +0530, "Mansoor" <mansoor at iwavesystems.com>
> wrote:
>>
>>
>>> -----Original Message-----
>>> From: Joe [mailto:joe at settoplinux.org]
>>> Sent: Thursday, October 29, 2009 7:32 PM
>>> To: Mansoor
>>> Cc: 'coreboot'
>>> Subject: Re: [coreboot] Error executing VGA ROM with coreboot
>>>
>>> On 10/29/2009 07:38 AM, Mansoor wrote:
>>> > Hi
>>> >
>>> > I keep getting "ILLEGAL EXTENDED X86 OPCODE!" from my VGA ROM while
>>> > trying run VGA ROM in coreboot.
>>> >
>>> > I tried x86emu, yabel and real mode for running VGA ROM with no luck.
>>> > But the same VGA ROM is running with seabios.
>>> >
>>> > I am attaching the boot logs with x86emu, real mode and with seabios.
>>> >
>>> > Any help?
>>> >
>>> > What is the big difference while executing VGA ROM in coreboot and
>>> seabios?
>>> >
>>> > Why coreboot can't run a VGA ROM which seabios can?
>>> >
>>> Hmm looks like your getting Unexpected Exception errors. Something is
>>> not initializing correctly. Memory maybe?
>>
>> I don't think so, because with seabios I am able to load Linux in GUI
> mode.
>> Only with coreboot I am facing these issues for initializing VGA ROM.
>>
>>
> You could always try Debugging the Unexpected Exception errors with GDB,
> this may give you a clue on what the problem is.
>
> http://www.coreboot.org/Debugging

Actually i tried GDB and failed to build the image.. I got  section
overlap error and was not able to solve it.

What i didnt understand is

Why coreboot can't run a VGA ROM which seabios can?
What is the big difference while executing VGA ROM in coreboot and
seabios?



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