r00x
Posts: 41
Joined: Mon Feb 04, 2013 11:05 am

Re: Screen Resolution

Fri Feb 15, 2013 12:22 pm

-rst- wrote:Yep, the actual display device most likely does not display any more pixels (physical limitations), but the framebuffer has more pixels and therefore the windows appear smaller (compared to the desktop size) ...the GPU scales the image down to the physical composite resolution.
This is correct - the output resolution does not change but the framebuffer will be larger, then scaled to fit. This should allow OP to resolve any issues with setting up wifi (though the screen will be hard to read!).

smulholl
Posts: 7
Joined: Wed Feb 06, 2013 6:03 pm

Re: Screen Resolution

Sat Feb 16, 2013 5:56 pm

Sorry to take so long to reply, but I'm travelling. I am using composite output to a 19" screen.

PS1981
Posts: 445
Joined: Wed Dec 12, 2012 4:11 pm

Re: Screen Resolution

Sat Feb 16, 2013 7:18 pm

Sorry to take so long to reply, but I'm travelling. I am using composite output to a 19" screen.
OK, so it's quite a difference when compared to my 4,3" screen! In fact I don't know if it's at all comparable. Anyway, if you haven't worked it out yet, maybe you could post your config and a photo of the screen?

smulholl
Posts: 7
Joined: Wed Feb 06, 2013 6:03 pm

Re: Screen Resolution

Sat Feb 16, 2013 8:26 pm

I have the same situation when I use a 3.5" screen that I have. I can't compare to a screen using HDMI as I don't yet own a television so equipped.

-rst-
Posts: 1316
Joined: Thu Nov 01, 2012 12:12 pm
Location: Dublin, Ireland

Re: Screen Resolution

Wed Feb 20, 2013 5:09 pm

I don't think it makes much difference what physical size the actual display equipment is - the maximum physical resolution of the composite output is 480 vertical (maybe 576). If the application window is higher in pixels than that...

You should try the config.txt settings:

framebuffer_width=[width]
framebuffer_height=[height]

...maybe something like 1080x720 (as the default most likely is 720x480) to begin with (1.5x default)?
http://raspberrycompote.blogspot.com/ - Low-level graphics and 'Coding Gold Dust'

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