Extending VGA ram?

Extending VGA ram?

[Heinz Ulrich Stille]

Hi!

I'd like to use screen resolutions of 1920x1200 to 2560x1600 at 32bpp.
So far I managed to raise the pixel limit, but not the memory size, and
8MB is a bit low for what I want. 1920x1200@24bpp works fine, but 32bpp
results in a segfault. Increasing VGA_RAM_SIZE in qemu/vl.h doesn't help.
What else does this depend on?

MfG, Ulrich

-- 
Heinz Ulrich Stille / Tel.: +49-541-9400473 / Fax: +49-541-9400450
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Re: Extending VGA ram?

[Avi Kivity]

Heinz Ulrich Stille wrote:
> Hi!
>
> I'd like to use screen resolutions of 1920x1200 to 2560x1600 at 32bpp.
> So far I managed to raise the pixel limit, but not the memory size, and
> 8MB is a bit low for what I want. 1920x1200@24bpp works fine, but 32bpp
> results in a segfault. Increasing VGA_RAM_SIZE in qemu/vl.h doesn't help.
> What else does this depend on?
>
>   

You'll need to emulate a card that supports these resolutions. I don't 
think cirrus does.  The vmware vga display in qemu-cvs probably does, 
but it hasn't been ported to kvm yet.  You might try that.


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error compiling committee.c: too many arguments to function


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Re: Extending VGA ram?

[Laurent Vivier]

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Avi Kivity wrote:
> Heinz Ulrich Stille wrote:
>> Hi!
>>
>> I'd like to use screen resolutions of 1920x1200 to 2560x1600 at 32bpp.
>> So far I managed to raise the pixel limit, but not the memory size, and
>> 8MB is a bit low for what I want. 1920x1200@24bpp works fine, but 32bpp
>> results in a segfault. Increasing VGA_RAM_SIZE in qemu/vl.h doesn't help.
>> What else does this depend on?
>>
>>   
> 
> You'll need to emulate a card that supports these resolutions. I don't 
> think cirrus does.  The vmware vga display in qemu-cvs probably does, 
> but it hasn't been ported to kvm yet.  You might try that.

BTW, what is your politic about qemu: do you update qemu inside kvm on qemu
release only ?

Laurent
-- 
------------- Laurent.Vivier-6ktuUTfB/bM@public.gmane.org  --------------
          "Software is hard" - Donald Knuth


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Re: Extending VGA ram?

[Avi Kivity]

Laurent Vivier wrote:
> BTW, what is your politic about qemu: do you update qemu inside kvm on qemu
> release only ?
>
>   
I plan to do a merge soon (if things become too stable), but if qemu 
releases before that, I'd be much happier.

Merging soon has the benefits of bringing in all the good stuff and 
making future merges easier; on the other hand it can bring in unstable 
code.  On the balance I think a merge would be helpful now.


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error compiling committee.c: too many arguments to function


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Re: Extending VGA ram?

[Heinz Ulrich Stille]

On Monday 24 September 2007, Avi Kivity wrote:
> You'll need to emulate a card that supports these resolutions. I don't
> think cirrus does.  The vmware vga display in qemu-cvs probably does,
> but it hasn't been ported to kvm yet.  You might try that.

I use Windows XP on std-vga. I tried hacking vgabios to report higher
resolutions and memory, but that doesn't seem to make any difference.
Windows lists 32bpp even if memory is insufficient for that.
So where is the catch? Would it be possible to make std vga support
large resolutions without too much effort?

MfG, Ulrich

-- 
Heinz Ulrich Stille / Tel.: +49-541-9400473 / Fax: +49-541-9400450
design_d gmbh / Wilhelmstr. 16 / 49076 Osnabrück / www.design-d.de
Osnabrück HRB 19116 / Geschäftsführer: Günter Tammen, Rolf Tammen


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Re: Extending VGA ram?

[Avi Kivity]

Heinz Ulrich Stille wrote:
> On Monday 24 September 2007, Avi Kivity wrote:
>   
>> You'll need to emulate a card that supports these resolutions. I don't
>> think cirrus does.  The vmware vga display in qemu-cvs probably does,
>> but it hasn't been ported to kvm yet.  You might try that.
>>     
>
> I use Windows XP on std-vga. I tried hacking vgabios to report higher
> resolutions and memory, but that doesn't seem to make any difference.
> Windows lists 32bpp even if memory is insufficient for that.
> So where is the catch? Would it be possible to make std vga support
> large resolutions without too much effort?
>
>   

I don't really know.  The vga bios, qemu device model, memory size, and 
guest driver all have to cooperate for this to work.

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error compiling committee.c: too many arguments to function


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