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HDMI connected shows black screen on TV
Posted: Tue Jul 31, 2018 9:22 am
by starmagoo
Hey Guys,
I got a Kite CSO with rev. 1.2A. After I connect to a TV via HDMI I get a black screen. What could that be? Is there a switch I need to activate or something else?
Thanks
Re: HDMI connected shows black screen on TV
Posted: Wed Aug 01, 2018 3:58 am
by kite
Have you tried another screen? It takes about 30 seconds after power on for the HDMI screen to show something.. from the start the screen should "show black" rather than "no signal" .. do you know which it is?
Re: HDMI connected shows black screen on TV
Posted: Wed Aug 01, 2018 4:24 am
by starmagoo
Yes, it shows a black screen on two different screens (TV/Monitor). It even shows the correct resolution (640x480) on the TV. Only the screen remains black. I can leaf it connected for longer. It should have been over 30 minutes.
Re: HDMI connected shows black screen on TV
Posted: Wed Aug 01, 2018 7:41 am
by kite
If you put SD into PC and look in file "config-cs.txt", does this line read:
? If not, change it to that..
If you have SSH or press F4 to get to console, what happens when you run:
Code: Select all
sudo systemctl start dpi-cloner.service
Also, if you run the following command what is shown:
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cat /opt/r*/configs/all/autostart.sh | grep "CLONER"
EDIT: Are you using the 640x480 LCD or the 320x240 one?
Re: HDMI connected shows black screen on TV
Posted: Wed Aug 01, 2018 1:21 pm
by starmagoo
kite wrote: ↑Wed Aug 01, 2018 7:41 am
If you put SD into PC and look in file "config-cs.txt", does this line read:
? If not, change it to that..
It's "ON".
kite wrote: ↑Wed Aug 01, 2018 7:41 am
If you have SSH or press F4 to get to console, what happens when you run:
Code: Select all
sudo systemctl start dpi-cloner.service
Nothing happens.
But PS says dpi-cloner is running
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pi@retropie:/boot $ ps aux | grep cloner
root 1149 0.6 0.0 36284 600 ? Ssl 19:13 0:00 /home/pi/Circuit-Sword/dpi-cloner/dpi-cloner
kite wrote: ↑Wed Aug 01, 2018 7:41 am
Also, if you run the following command what is shown:
Code: Select all
cat /opt/retropie/configs/all/autostart.sh | grep "CLONER"
Code: Select all
pi@retropie:/boot $ cat /opt/retropie/configs/all/autostart.sh | grep "CLONER"
if [[ "$CLONER" == "ON" ]] ; then
echo "Starting CLONER.."
kite wrote: ↑Wed Aug 01, 2018 7:41 am
EDIT: Are you using the 640x480 LCD or the 320x240 one?
I'm using the 640x480 LCD. The resolution seems to bo recognized correctly.
Re: HDMI connected shows black screen on TV
Posted: Thu Aug 02, 2018 4:53 am
by kite
hmm .. i may need to check something as the 640x480 LCD timing may be messing up the HDMI output! If you change your config in config.txt to enable the 320x240 LCD (this is safe to do, the internal 640x480 LCD won't display correctly but you can test HDMI, you don't need to actually plug the 320x240 one in you can just make the text file change)
Re: HDMI connected shows black screen on TV
Posted: Fri Aug 03, 2018 2:47 am
by starmagoo
You are right. If I change the resolution to 320x240 the HDMI output works and I got a picture.
What can I do to get 640x480 or better 720p/1080p on HDMI working? Do I need to reconfigure the dpi-cloner?
Re: HDMI connected shows black screen on TV
Posted: Fri Aug 03, 2018 3:22 am
by kite
Could you open an issue on github about that, my solution that I'm working on is basically in the menu a "One time reboot to HDMI" .. there are example out there but I'll of course make it easy and simple.. this will set hdmi to 720/1080p or something and then clone BACK to the internal screen .. or even disable the internal screen we'll see how it works out.. but that will solve it for the 640x480 lcd.. it just happened that the 320x240 didn't mess with the hdmi timings enough to disable output
Re: HDMI connected shows black screen on TV
Posted: Sat Aug 04, 2018 3:47 am
by starmagoo
I have tried my best to open a ticket about the problem.
https://github.com/kiteretro/Circuit-Sword/issues/59