Raspberry Pi 5 about rpi-backlight HOT 2 OPEN

I can confirm this error on the RPI5 which has 2 display/camera ports.

Plugging into Display 1 creates 4-0045 and into Display 0 creates 6-0045 - The 10-0045 seems to be a Pi4 artifact which only has 1 display port.

My messy fix to rpi_backlight-2.6.0 init.py (Tested on Pi5 but not tested on Pi4 or Pi3 with earlier versions of Raspbian) is:

_BACKLIGHT_SYSFS_PATHS = {
BoardType.RASPBERRY_PI: (
"/sys/class/backlight/4-0045/"
if Path("/sys/class/backlight/4-0045/").exists()
else "/sys/class/backlight/6-0045/"
if Path("/sys/class/backlight/6-0045/").exists()
else "/sys/class/backlight/10-0045/"
if Path("/sys/class/backlight/10-0045/").exists()
else "/sys/class/backlight/rpi_backlight/"
),
BoardType.TINKER_BOARD: "/sys/devices/platform/ff150000.i2c/i2c-3/3-0045/",
BoardType.TINKER_BOARD_2: "/sys/devices/platform/ff3e0000.i2c/i2c-8/8-0045/",
BoardType.MICROSOFT_SURFACE_RT: "/sys/class/backlight/backlight/",
}

This library will probably not work correctly if you plug in 2 displays.

from rpi-backlight.

Just ran into the same issue, and came to the same conclusions as the posters above.

from rpi-backlight.