HDMI output flickering

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HDMI output flickering

Postby Archino » 26 Aug 2017, 11:49

Hi,

I just started 0.4 Beta on PI3. It boots up, but from the first second, the connected screen (normal monitor with HDMI-VGA adapter) keeps flickering. I can somehow see a picture, but something seems to be wrong with the timing. I have also a Pifi digi+ connected at the same time.

Its not a HW issue, because if I boot with another SD card with Libreelec, everything works fine.

Any ideas?

Thanks,
Archi
Archino
 
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Re: HDMI output flickering

Postby hondagx35 » 26 Aug 2017, 14:00

Hi Archi,

The problem is your HDMI to VGA adapter.
Please try to tweak the HDMI settings in /boot/config.txt.
I would start with "hdmi_group" and "hdmi_mode".
Code: Select all
#   DMT
hdmi_group=2
#  1280x768   60 Hz
hdmi_mode=23


For more and detailed information please read this.

Frank
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Re: HDMI output flickering

Postby Archino » 26 Aug 2017, 14:48

Not yet. Thanks for the hints anyway.

When I do this the screen stays dark. I also tried disabling CEC and hdmi_save without success. Later I will look into the config. txt of Libreelec and see whats the difference.

Also found some LIRC settings in the config. Maybe I get also that part running. Stay tuned :-)
Archino
 
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Re: HDMI output flickering

Postby jfloresqui » 18 May 2019, 02:53

Hi.
I am using a generic HDMI to VGA converter, tried the parameters proposed by hondagx35,and voila!, the Rpi Zero W works fine.
After 4 hours of usage works fine.
I hope this will be useful for you.
Note: For your reference, the HDMI-VGA converter I use, does not use external power.
Regards.
jfloresqui
 
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