ubuntu-x-swat team mailing list archive

[Fawn <fawn@xxxxxxxxxxxxx>]

Many thanks. This has been a real pain for ages.

Fawn

On Tue, 04 May 2010 12:25 +0000, "Peter" <perivol@xxxxxxxxx> wrote:
> I have resolved the problem after comparing the 8.04 LTS and 10.04 LTS
> Xorg.0.log files. Under 8.04 LTS the MGA driver was defaulting to
> 
> (**) MGA(0): Depth 16, (--) framebuffer bpp 16
> 
> Under 10.04 LTS it is defaulting to
> 
> (**) MGA(0): Depth 24, (--) framebuffer bpp 32
> 
> which is the cause of the bandwidth problem.  Setting "DefaultFbBpp 24"
> in the "Screen" section of xorg.conf enables the 1280x1024 mode, but all
> screen operations are very slow. The combination of  "DefaultDepth  16"
> and  "DefaultFbBpp 16" provides completely acceptable performance which
> is, in fact, a bit faster than under 8.04 LTS.
> 
> -- 
> Missing display resolutions (too much memory bandwidth)
> https://bugs.launchpad.net/bugs/469640
> You received this bug notification because you are a direct subscriber
> of the bug.
>

-- 
Missing display resolutions (too much memory bandwidth)
https://bugs.launchpad.net/bugs/469640
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-mga in ubuntu.