Hi. Thank you for the excellent library. I have a P8 40x20 panel working fine. It is probably an older panel. I had to tweak multiplexer 13 P10Outdoor1R1G1BmMultiplexMapper2 to get it to work changing the tile height from 4 to 5.
My problem is there seems to be a flicker in every 7th row. I am using a Compute Module 4 with 16GB of memory running Raspbian.
I have tried a range of variations of led-slowdown-gpio and led-limit-refresh. These settings have some effect on the flickering but never fully remove it.
The problem occurs on all output - moving displays or static text. It is only a lit LED that flickers.
And I must stress all other rows look perfect regardless of the changes in slowdown or refresh.
Let me know if anyone has any thoughts on this. Thank you.
it’s hard to debug this, but make sure you’ve followed all the suggestions in the README to turn off other things that can conflict with timing (sound, etc…), as well as turning off daemons, etc…
@hzeller recommends using dietpi as a more barebones install that is less likely to conflict, although I do use raspi myself and it works well enough
Dietpi is a great suggestion. I am going to give this a try, as I am getting a lot of flickering on my 64x32 display.