Are you using KDE? I had this problem the other day, and systemctl stop/disable packagekit didn't help at all.

Here's the prompt:

In this example, polkit.subject-pid is PID 2201, which is:

username 2201 0.0 0.1 1354816 24440 ? Sl Oct27 2:46 kded5 [kdeinit5] 

Which suggests that KDE might be doing something. On my system, KDE doesn't have package management settings in the system settings tool, but opening apper's settings menu I found this:

Setting this to Never took care of the problem for me.

Hope this helps.

Update: systemctl mask packagekit works as well. See for example http://0pointer.de/blog/projects/three-levels-of-off, which describes the difference between systemctl stop, disable, and mask. mask makes services completely unstartable until they are unmasked again.

Are you using KDE? I had this problem the other day, and systemctl stop/disable packagekit didn't help at all.

Here's the prompt:

In this example, polkit.subject-pid is PID 2201, which is:

username 2201 0.0 0.1 1354816 24440 ? Sl Oct27 2:46 kded5 [kdeinit5] 

Which suggests that KDE might be doing something. On my system, KDE doesn't have package management settings in the system settings tool, but opening apper's settings menu I found this:

Setting this to Never took care of the problem for me.

Update: systemctl mask packagekit works as well. See for example http://0pointer.de/blog/projects/three-levels-of-off, which describes the difference between systemctl stop, disable, and mask. mask makes services completely unstartable until they are unmasked again.

Are you using KDE? I had this problem the other day, and systemctl stop/disable packagekit didn't help at all.

Here's the prompt:

In this example, polkit.subject-pid is PID 2201, which is:

username 2201 0.0 0.1 1354816 24440 ? Sl Oct27 2:46 kded5 [kdeinit5] 

Which suggests that KDE might be doing something. On my system, KDE doesn't have package management settings in the system settings tool, but opening apper's settings menu I found this:

Setting this to Never took care of the problem for me.

Hope this helps.

Are you using KDE? I had this problem the other day, and systemctl stop/disable packagekit didn't help at all.

Here's the prompt:

In this example, polkit.subject-pid is PID 2201, which is:

username 2201 0.0 0.1 1354816 24440 ? Sl Oct27 2:46 kded5 [kdeinit5] 

Which suggests that KDE might be doing something. On my system, KDE doesn't have package management settings in the system settings tool, but opening apper's settings menu I found this:

Setting this to Never took care of the problem for me.

Hope this helps.

Update: systemctl mask packagekit works as well. See for example http://0pointer.de/blog/projects/three-levels-of-off, which describes the difference between systemctl stop, disable, and mask. mask makes services completely unstartable until they are unmasked again.