High resolution on i855 external CRT

[Alex Deucher]

On Thu, 03 Feb 2005 18:19:46 -0500, Andrew Barr <barr.156 at osu.edu> wrote:
> Hi.
> 
> I have a laptop with an i855GM chip in it (Dell Inspiron 300m) and X.org
> 6.8.1 from the Fedora Core 3 distribution. The LCD only supports
> resolutions up to 1024x768, but under a certain other operating system I
> could attach an external CRT and have it run at 1280x1024. Is there any
> way to do this in X.org? If not, is this possibly something that could
> be implemented in the future?
> 
> Thanks,
> Andrew Barr
> 

this is only possible if the bios supports the mode you want to use. 
if not, there are some hacks available to add another mode to the bios
(google for i855resolution).  The other OS knows how to program the
modes directly.

Alex