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Composite video not working?

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grit  
Post Last Edited by grit at 2014-8-18 01:35

these build instructions for sunxi-tools work fine - the directory 'sunxi-boards' changed to 'sunxi-boards-bananapi' by the way (aug-2014)
http://forum.lemaker.org/65-1-1-build_script_bin_for_bananapi.html

My BPi is now displaying via the composite out video, but...in monochrome. I have set the screen0_output_mode to 11. Also set dac_used=1 and dac3_src=0 (as found here http://linux-sunxi.org/Display.

Any idea?

Edited by actkk2000 at Wed Dec 3, 2014 09:13

You should try mode 14 for ntsc.
See these instructions and table:
http://forum.lemaker.org/forum.p ... 57&fromuid=1602
http://forum.lemaker.org/forum.p ... 32&fromuid=1602

Hello, i'm also trying to use the TV out display of my banana pi with the raspbian image

I modified the fex file as explained above (thanks for explainations) and the display is now going on composite output. BUT, the banana seems it refuse to boot if no HDMI cable is plugged in.

When i start my banana without HDMI cable plugged, the red light turn off less than a second after i started it...

It seems that the bootloader check if a HDMI cable is connected at early boot stage and refuse to boot if no HDMI cable is connected.

It mean i can't use my banana if no HDMI screen is connected (for example if want to use it as a server/router/robot/ or build a robot with it, i wouldn't be able beacause it will refuse to start without screeen...

Anyone know how to start the banana without HDMI screen connected?

I just solved the problem described above... it was due to my power supply who was not sufficient...

Still strange that when the banana lack power, it can boot when the power cable is pluged and can't boot when the power cable isn't pluged...

I put a stronger power supply and i don't have problems now :-)

Edited by Fighter19 at Sun Jan 4, 2015 09:45
banana replied at Fri Jul 4, 2014 04:19
Post Last Edited by banana at 2014-7-4 04:20

hello , have had the same Problem , after modify the ...


For others: It normally means you're using the wrong refresh rate, (try 50Hz if that doesn't work 60Hz) in case someone else gets that problem.

Hi Tony,

I am attempting this configuration change but encountering a few difficulties.

The document that you reference "Please refer to http://sunxi.org/Fex_Guide#.5Bdisp_init.5D" does not appear to be available. After some research, I think the url currently would be linux-sunxi.org. When I visit that site directly or through Google, however, the site appears to be down or otherwise not available to me. Can this document be found at an alternative location?

I have downloaded bin2fex/fex2bin for my Mac. The fex file is readable, so presumably the conversion worked. I found code in the fex file that looked like the code above; and made the changes to the values as recommended above. After converting with fex2bin and moving the SD card to my Pro, however, the Pro no longer boots. No blue light. Green does flash off/on. Do you have any suggestions as to what the problem could be?

Thank you!!

You need just modify:
  1. screen0_output_type = 2
  2. screen0_output_mode = 11
Copy the Code
Could you please post your configuration of disp_para

Hi Tony,

I am still unable to reach this site that you recommend for documentation: Please refer to http://sunxi.org/Fex_Guide#.5Bdisp_init.5D. The site times out. Also I found on Google that the site may be named linux-sunxi.org, but that times out also. Is there an alternative location to obtain the documentation?

google cache:
http://webcache.googleuserconten ... sunxi.org/Fex_Guide
scroll down until disp init configuration

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