Adam Magaluk <AdamM <at> illuminatingconcepts.com> writes:
> Hi List,
> I have the Overo Water with Tobi board flashed with the factory image.
> I see by default that the screen resolution it 1024x768 <at> 60 how can I
change that to 800x600 <at> 60?
> Ive tried to set up a new mode in fb.modes and use fbset to change to that
mode but that doesn't work.
> Where is the default mode configured at?
> Adam Magaluk
> Attachment (winmail.dat): application/ms-tnef, 2514 bytes
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> gumstix-users mailing list
> gumstix-users <at> lists.sourceforge.net
Answering my own question:
Here is a way to change the screen resolution on the Gumstix Tobi/Summit boards
without editing the linux kernel.
The first step was changing the resolution from the default 1024x768@...
1. Restart Gumstix, interrupt boot process by pressing any key in
2. Set DVI Mode in the boot args: setenv dvimode 800x600MR-32@...
3. Save boot args by running: saveenv
Note: This did change the resolution of the screen to 800x600@... bpp 32,
this can be verified from console by running fbset.
Problems: The timings and vertical sync is still not to your standard,
fbset shows the fallowing timings:
Pix Cock: 27777
Left Margin: 80
Right Margin: 48
Upper Margin: 3
Lower Margin: 11
Horizontal Sync Length: 32
Vertical Sync Length: 4
Also there is no verification as to what the vertical sync polarity is
I tied to add a property to the boot args to set vertical sync to low by
running in uboot console with: setenv dvimode 80x600MR-32@...;
I was unable to verify if it worked of not, but the sign still did not
I created a frame buffer mode that specifies all of your requirements
geometry 800 600 800 600 32
timings 42503 48 156 1 30 114 3
Ive tried setting this as the boot ags dvimode but the boot process
cannot find modes in the /etc/fb.modes file for some reason.
I have also tried setting the mode with fbset Yesco this shows no sign
of change but gives no errors.