Re: Changing resolution on the fly ....

Hi;

on Wed, Jul 02, 2003 at 05:21:15PM +0900, Armand Vedadi wrote:
> Hi,
> I am knocking my head on the wall for days trying to find out how to 
> change the resolution of the Xipaq (and so the GPE that lays above) on 
> the fly ...

I didn't think the fb on the ipaq was capable of changing resolution. 

> When no application is running, one can change the resolution by using 
> fbset, but as soon as an application runs, fbset has no effect until 
> that application is killed. Can anyone explain me why?

I dont think its a good idea to run fbset under X. 

> Since Xrandr works fine, I think it is possible to change the resolution 
> on the fly. The only problem is that only one "randr size" is set (the 
> one given by the framebuffer when  the first Xclient is launched). 

Right, on the ipaq that is. On tabletPC with xrandr I get a whole
range of screen sizes, but thats using an Xvesa tinyX server. 

> I 
> looked in the Xrandr library, but found no way to "register" new
> sizes. I've also looked in the sources of the randr extension of the XServer. 
> Apparently, the function "RRRegisterSize" is used once when the default 
> screen is used with the default size values, thus enabling only one 
> size. I'd like to change and register different sizes, but have no 
> experience in X development.
> 

Maybe the Xfbdev tinyX server is missing code to figure out valid fb
sizes. On the C700 the fb driver can do different resolutions ( though
its mostly crashes when you do change it :( ), though xrandr dont list
them so maybe the code is missing. 

I think You'd probably be better to mail the xfree developers list and ask
about this there. Or compare code for the Xvesa and XFbdev tinyX
servers ( see xc/programs/Xserver/hw/kdrive in X src ).

> I am working on a driver that allows different resolution for the iPAQ, 
> and I need a window  system that can also be resized on the fly in order 
> to carry out further experiments ... 

Cool.

> Correct me if I m wrong, but Opie 
> has no such capabilities, right?

I wouldn't have thought so. Last time I looked it could do a rotation,
but needed to restart and alot of stuff broke. 

  -- Matthew