[CentOS] KVM Linux Guest Resolution only 1024x768

Sun May 4 19:32:24 UTC 2014
Nux! <nux at li.nux.ro>

On 04.05.2014 08:39, Chris wrote:
> Dear All,
> 
> I'm trying to install a Debian Wheezy KVM guest on a CentOS 6.4 Host.
> The only resolutions supported are 1024x768 or 800x600.
> 
> I increased the video RAM to 500 MB, but the guest still says:
> 
> [    10.321] (II) CIRRUS(0): Not using default mode "1920x1200"
> (insufficient memory for mode)
> 
> Only 32 MB are recognized:
> 
> 00:02.0 VGA compatible controller: Cirrus Logic GD 5446 (prog-if 00 
> [VGA
> controller])
>         Subsystem: Red Hat, Inc Device 1100
>         Physical Slot: 2
>         Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR- FastB2B- DisINTx-
>         Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
>         Region 0: Memory at f0000000 (32-bit, prefetchable) [size=32M]
>         Region 1: Memory at f2000000 (32-bit, non-prefetchable) 
> [size=4K]
>         Expansion ROM at f2010000 [disabled] [size=64K]
> 
> How can I increase the resolution? Are any guest modifications 
> necessary?

For better video performance switch from VNC to Spice display and QXL 
video card.

HTH
Lucian

-- 
Sent from the Delta quadrant using Borg technology!

Nux!
www.nux.ro