Are you sure it took effect ?
It sounds really similar to the issues I had.
Run this repeatedly to check that it is stable:
Have you forced the core clock to be stable ?
I use force_turbo in config.txt to do it
Measure the voltage at the led strip.
Different colour leds have differing forward voltage requirements. Blue being the highest (about 3 ish volts)
Never got the time - in fact never took up the offer of a free device
You likely need to build from source.
I doubt the platform screen grabber will work - x11 night and a kodi addon night work.
- USB led device...
Wiring issue is the usual cause.
How long is the strip ?
What OS are you running ?
A more obscure cause is the default maximum dma transfer size
Level shifter is required based on the data sheets.
With small short setups you’ll often get away with it but most meaningful setups have longer...
I’ve had it running on linux/x86 sending ng to an esp.
I think the kodi addon becomes the grabber on x86 but I’ve never used it
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