Power button working with Kernel up to 4.9 only . If you have Ubuntu Jammy there is Kernel above 5. Kernel above 5 have completely different construction and until today nobody finalized this feature on ON2/ON2+ . It means there is not possible now to have a power button active with new software. Personaly I'm using ON2+ with Armbian 20.08 with 4.9.277 Kernel and all is ok but this Kernel and general soft with drivers are too weak to control CPU and GPU. My software SDRpp CPU on Armbian os used up to 99 and 100% with all cores. When I install this software on Ubuntu Jammy 22.04 CPU is used max up to 70% with the same settings. Until now forget it ...
