Re: [Xen-users] OpenSuse 11 hvm domU: screen resolution up to 640x480

[jim burns <jim_burn@xxxxxxxxxxxxx>]

On Wed November 16 2011, 10:47:32 AM, Flavio wrote:
> OK, this is what I see right now (without any change):
> stdvga=0 && videoram=16 && kernel 3.0.1
> Region 0: Memory at f0000000 (32-bit, prefetchable) [size=32M]
> Region 1: Memory at f3020000 (32-bit, non-prefetchable) [size=4K]
> Max Resolution: 800x600
> 
> stdvga=1 && videoram=8 && kernel 3.0.1 (I noticed the domU is slightly
> faster) Region 0: Memory at f1000000 (32-bit, prefetchable) [size=8M]
> Expansion ROM at <unassigned> [disabled]
> Max Resolution: 800x600
> 
> stdvga=1 && videoram=16 && kernel 3.0.1
> Region 0: Memory at f0000000 (32-bit, prefetchable) [size=16M]
> Expansion ROM at <unassigned> [disabled]
> Max Resolution: 800x600
> 
> stdvga=1 && videoram=32 && kernel 3.0.1
> Region 0: Memory at f0000000 (32-bit, prefetchable) [size=16M]
> Expansion ROM at <unassigned> [disabled]
> Max Resolution: 800x600
> 
> So, something changed for 8 and 16M! But I didn't understand what has
> changed.

We are changing the amount of memory the emulated vesa capable video adapter 
is allowed to use. Considering modern video cards typically have 256M, I was 
hoping we could up the memory being used.

You'll notice that the cirrus emulation (stdvga=0) already uses 32M (and 
ignores the videoram parameter),which is what I hoped we could assign to the 
vesa emulation (stdvga=1). 32M is more than enough to support the higher 
resolution. Unfortunately, the cirrus emulation is not working in this domu. 
(The more memory, the more resolutions supported.)

> Now the
> "size" increases but the max resolution is still 800x600.

Bummer! Except the size didn't go up for videoram=32M. Curious.

> At least I notice
> a faster domU with these settings. Haven't we already tried to set different
> videoram quantity in our previous attempt, without success? Maybe the only
> attempt we did was for videoram=32.

If you tried it, you didn't post the results. I only saw you use videoram=16.

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