tom66
Posts: 18
Joined: Tue Jan 10, 2012 12:14 am

Re: Using with 720p display

Thu May 03, 2012 9:52 pm

I have a rather old 720p LCD TV for use with the Pi (LG 42LC46) – it"s a TV I got with bad caps and fixed, so I have no intention (or money!) to upgrade soon.

Anyway, the Pi boots fine on the TV and as expected the image is scaled (looks a little blocky) – but unfortunately it"s cropped at the edges. The TV seems to do this on all 1080p sources; I"ve only really used it with 720p, so is it possible to get the Pi to output 720p on the HDMI, or alternatively scale down the video so there"s a 30 or so pixel border around it (making it a weird resolution like 1860 x 1020)?

It does this in both console and LXDE when using the default Debian build.

jamesh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 28423
Joined: Sat Jul 30, 2011 7:41 pm

Re: Using with 720p display

Thu May 03, 2012 9:59 pm

Search the troubleshooting section for overscan, and likewise check the Wiki for more information.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
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JeremyF
Posts: 515
Joined: Wed Jan 25, 2012 9:06 pm
Contact: Website

Re: Using with 720p display

Thu May 03, 2012 10:14 pm

http://elinux.org/RPi_config.txt

Read this...and things I would try first would be:

hdmi_mode=4 (720p/60Hz)

hdmi_mode=47 (720p/120Hz)

disable_overscan=1

You can also play around with overscan_left, overscan_right, overscan_top, and of overscan_bottom with the corresponding number of pixels to skip.
{sig} Setup: Original version Raspberry Pi (B, rev1, 256MB), Dell 2001FP monitor (1600x1200), 8GB Class 4 SD Card with Raspbian and XBMC, DD-WRT wireless bridge

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