Matthew White

I hadn't done an upgrade but a fresh install; (v25.5.1 for Raspberry Pi 3 Model B running Armbian Linux 6.12.28-current-bcm2711) Realised that I had the same problem, only channel 2 was present; though I only realised something was missing when I'd tried RaspberryOS on a Pi Zero with the same i2c device. Adding to the /boot/config.txt didn't of itself solve the issue; adding the i2c1 to the armbian-config overlays also didn't see. However I did find the `/boot/firmware/config.txt` that has a lot more settings, and seems to be where armbian-config edits Note the `dtparam-i2c_arm=on` line... which was commented out. Adding that back and it works... (well after figuring out I needed to level shift the i2c device but that's another story) # For more options and information see # http://rptl.io/configtxt # Some settings may impact device functionality. See link above for details # Uncomment some or all of these to enable the optional hardware interfaces dtparam=i2c_arm=on #dtparam=i2s=on #dtparam=spi=on # .. dtoverlay=dwc2 i2c0 i2c1 i2c-gpio vc4-kms-v3d