Hi,

I tested the proposed packages on Jammy, Noble, Plucky  on a laptop with barrel 
jack power cord
All packages work as expected


```
_____JAMMY

ubuntu@node2:~$ dpkg -l | grep powermgmt-base
ii  powermgmt-base                                     1.36                     
                                        all          common utils for power 
management


root@node2:~# apt-cache madison powermgmt-base 
powermgmt-base | 1.36ubuntu0.22.04.1 | http://archive.ubuntu.com/ubuntu 
jammy-proposed/main amd64 Packages
powermgmt-base | 1.36ubuntu0.22.04.1 | http://archive.ubuntu.com/ubuntu 
jammy-proposed/main i386 Packages
powermgmt-base |       1.36 | http://hu.archive.ubuntu.com/ubuntu jammy/main 
amd64 Packages
powermgmt-base |       1.36 | http://hu.archive.ubuntu.com/ubuntu jammy/main 
i386 Packages


sudo apt install powermgmt-base


ubuntu@node2:~$ dpkg -l | grep powermgmt-base
ii  powermgmt-base                                     1.36ubuntu0.22.04.1      
                                        all          common utils for power 
management


____laptop plugged in to power source
root@node2:~# on_ac_power
root@node2:~# echo $?
0

____laptop disconnected from power source
root@node2:~# on_ac_power
root@node2:~# echo $?
1
```


```
_____NOBLE

ubuntu@node3:~$ dpkg -l | grep powermgmt-base
ii  powermgmt-base                                 1.37                         
             all          common utils for power management


ubuntu@node3:~$ apt-cache madison powermgmt-base 
powermgmt-base | 1.37ubuntu0.1 | http://archive.ubuntu.com/ubuntu 
noble-proposed/main amd64 Packages
powermgmt-base |       1.37 | http://archive.ubuntu.com/ubuntu noble/main amd64 
Packages
powermgmt-base |       1.37 | http://archive.ubuntu.com/ubuntu noble/main 
Sources
powermgmt-base | 1.37ubuntu0.1 | http://archive.ubuntu.com/ubuntu 
noble-proposed/main Sources


sudo apt install powermgmt-base=1.37ubuntu0.1

ubuntu@node3:~$ dpkg -l | grep powermgmt-base
ii  powermgmt-base                                 1.37ubuntu0.1                
             all          common utils for power management


____laptop plugged in to power source
root@node3:~# on_ac_power
root@node3:~# echo $?
0


____laptop disconnected from power source
root@node3:~# on_ac_power
root@node3:~# echo $?
1
```


```
_____PLUCKY     


ubuntu@node3:~$ dpkg -l | grep powermgmt-base
ii  powermgmt-base                                  1.38                        
               all          common utils for power management


ubuntu@node3:~$ apt-cache madison powermgmt-base 
powermgmt-base | 1.38ubuntu1~25.04.1 | http://archive.ubuntu.com/ubuntu 
plucky-proposed/main amd64 Packages
powermgmt-base | 1.38ubuntu1~25.04.1 | http://archive.ubuntu.com/ubuntu 
plucky-proposed/main i386 Packages
powermgmt-base |       1.38 | http://archive.ubuntu.com/ubuntu plucky/main 
amd64 Packages
powermgmt-base |       1.38 | http://archive.ubuntu.com/ubuntu plucky/main i386 
Packages


sudo apt install powermgmt-base=1.38ubuntu1~25.04.1


ubuntu@node3:~$ dpkg -l | grep powermgmt-base
ii  powermgmt-base                                  1.38ubuntu1~25.04.1         
               all          common utils for power management


____laptop plugged in to power source

root@node3:~# on_ac_power
root@node3:~# echo $?
0


____laptop disconnected from power source

root@node3:~# on_ac_power
root@node3:~# echo $?
1
```

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https://bugs.launchpad.net/bugs/1980991

Title:
  /usr/sbin/on_ac_power incorrectly reporting ac power status

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