Flickering in hyperpixel display about linux

[6by9]

You say the "hyperpixel display (the rectangle one)". Do you mean the obsolete Hyperpixel (https://github.com/pimoroni/hyperpixel), or HyperPixel4? Sorry to be pedantic, but details matter.

You've reported it to Pimoroni? I don't see anything on https://github.com/pimoroni/hyperpixel4/issues

I've just tested a HyperPixel4 (rectangular 480x800) on both a Pi4 and Pi5 and don't see any issues.

I'm afraid this is a 3rd party product, so whilst the driver is part of this repo (indeed we worked with Pimoroni to support the display) and we will offer some support, there is little we can do.

I suspect it will be backlight flicker, which possibly means a power supply noise related issue. There is nothing from the Pi side that it can do, as we only have on/off control for the backlight.

[steveiliop56]

I have the hyperpixel 4 inch but it has the old special adaptor for i2c instead of the newer Dupont wires. Maybe it's not backlight and it's some kind of interference? I use the official 27w power supply.

I've just tested a HyperPixel4 (rectangular 480x800) on both a Pi4 and Pi5 and don't see any issues.

Did you try in dark mode? Did you look very close?

[6by9]

I have the hyperpixel 4 inch but it has the old special adaptor for i2c instead of the newer Dupont wires. Maybe it's not backlight and it's some kind of interference? I use the official 27w power supply.

Sorry, I have no information on variations of these displays.
Mine is as per the top image on https://shop.pimoroni.com/products/hyperpixel-4?variant=12569485443155

I'm using a Pi 4 standard 15W PSU.

I've just tested a HyperPixel4 (rectangular 480x800) on both a Pi4 and Pi5 and don't see any issues.

Did you try in dark mode? Did you look very close?

Yes I was in dark mode, and looking closer than a normal person would.

[steveiliop56]

The only difference my screen has is this adaptor:

Seems weird since another user in the hyperpixel repo reported the same issue too pimoroni/hyperpixel4#177