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Setting resolution and aspect ratio

Posted: Fri Jan 09, 2015 10:12 pm
by mancity
Hi all,

I'm moving my Pi to a different monitor which is 4:3 aspect ratio and resolution-wise is I think 1280x970.

Please can somebody explain how I make the Pi display at these settings? I've looked up tvservice but couldn't get it to work so I'm here.

Also, is there anyway (like Windows would), that the Pi can detect the maximum resolution of the monitor its connected to, or do you just have to know beforehand?

I'm connecting to th monitor via via using a home to bag converter.


Thank you

Re: Setting resolution and aspect ratio

Posted: Fri Jan 09, 2015 10:24 pm
by DougieLawson
Are you using HDMI, DVI-D or RCA analog A/V?

Re: Setting resolution and aspect ratio

Posted: Fri Jan 09, 2015 10:31 pm
by mancity
Vga using hdmi to vga converter.

The monitor only has vga so the Pi has a hdmi to vga converter attached to its hdmi port and a vga connected to the monitor through that.

Re: Setting resolution and aspect ratio

Posted: Fri Jan 09, 2015 10:37 pm
by W. H. Heydt
Does your VGA converter have it's own power? If so, it may pass the EDID data back to the Pi.

FYI...the most common geometry for 1280 horizontal on old monitors is 1280x1024. To be sure what the native resolution is, do a web search on the monitor to get the specs.

Re: Setting resolution and aspect ratio

Posted: Fri Jan 09, 2015 10:53 pm
by mancity
No it doesn't have its own power just hdmi in and vga + audio out.

I can't Google the monitor to find the red because it's the screen only. The bezel and make/ model were removed a while back (as this is I'm an arcade cabinet) and I don't remember the make/ model, unfortunately.

Re: Setting resolution and aspect ratio

Posted: Fri Jan 09, 2015 11:08 pm
by FTrevorGowen
FWIW, here are a few examples of how to use tvservice info. and associated edits of config.txt (when required) for an HDMI-to-VGA converter + a display with and without (because of a VGA switch box) full DDC info. being passed:
http://www.cpmspectrepi.webspace.virgin ... _VGA_Input
Trev.