Subject: bug#48265: mate-power-backlight-helper is referred to by store name instead of polkit action (IIUC)

From: Ludovic Courtès <[email-masked]>
Date: Thu, 06 May 2021 23:02:25 +0200

Hi!

Maxime Devos <[email-masked]> skribis:

> FWIW, the following works as expected (no error message), using the store path in .policy:
> $ pkexec /gnu/store/zk4kb4437032swahywmgyzn55b5w5wj8-mate-power-manager-1.24.2/sbin/mate-power-backlight-helper --set-brightness=300
> Maybe MATE is trying the equivalent of "pkexec /wrong/store/path/mate-power-backlight-helper --etcetera" instead
> of referring to the action by name org.mate.power.backlight-helper.
>
> Note the store path is different. Now try something different
>
> $ which mate-power-backlight-helper
>> /run/current-system/profile/sbin/mate-power-backlight-helper
> $ ls -l /run/current-system/profile/sbin/mate-power-backlight-helper
>> /gnu/store/ffqhy4xdpzkg06rlq76zrbwn8v3rqgw9-mate-1.24.1/sbin/mate-power-backlight-helper

These are different versions (1.24.2 vs. 1.24.1).  But that’s just two
store file names; where’s the third one?

Isn’t the problem that you reconfigured and so there’s now a mismatch
between the polkit rule in effect, which expects 1.24.1 (say), and the
version you’re running?

(FWIW brightness change works in GNOME.)

Thanks,
Ludo’.