org.freedesktop.PowerManagement always available?

[Thomas Kluyver]

Hi Christian,

On Tue, 8 Apr 2025, at 16:18, c.buhtz at posteo.jp wrote:
> 2. To my research the freedesktop session manager is somehow connected 
> to tjhe "upower" package which is available on most GNU/Linux systems. 
> If "upower" is installed (maybe because it is a dependency of my 
> application) can I rely on the fact, that the freedesktop manager will 
> always be available? So I could get rid of the two other managers and 
> the iteration?

Unfortunately that's not the case. I'm using Gnome, upower is installed, but there's no org.freedesktop.PowerManagement service. This looks like the page for the freedesktop API:

https://www.freedesktop.org/wiki/Specifications/power-management-spec/

"This is no longer supported in gnome-power-manager. This spec is considered obsolete."

I've no idea why it's obsolete, but it does look like you'll need to keep supporting different interfaces for this.

Best wishes,
Thomas