Unprivileged power managing in GuixSD: dbus-send not working

Unprivileged power managing in GuixSD: dbus-send not working

[swedebugia]

Hi

I'm using GuixSD with xfce recently pulled, reconfigured and restarted.

I have found that power managing dbus-send commands (from 
http://andrusiv.com/blog/2011/12/12/shutdown-dbus.html) does not work at 
all, eg:

$ dbus-send --system --print-reply --dest=org.freedesktop.ConsoleKit 
/org/freedesktop/ConsoleKit/Manager 
org.freedesktop.ConsoleKit.Manager.Stop

Error org.freedesktop.DBus.Error.ServiceUnknown: The name 
org.freedesktop.ConsoleKit was not provided by any .service files

or

$ dbus-send --print-reply --system --dest=org.freedesktop.UPower 
/org/freedesktop/UPower org.freedesktop.UPower.Suspend

Error org.freedesktop.DBus.Error.UnknownMethod: Method "Suspend" with 
signature "" on interface "org.freedesktop.UPower" doesn't exist

Is this because dbus / polkit is currently misconfigured?

Is there anything I can do about it? I'm guessing the incapability of 
the xfce power menu to function is related to this.

cheers
sdb

Re: Unprivileged power managing in GuixSD: dbus-send not working

[Ludovic Courtès]

swedebugia@riseup.net skribis:

> I'm using GuixSD with xfce recently pulled, reconfigured and restarted.
>
> I have found that power managing dbus-send commands (from
> http://andrusiv.com/blog/2011/12/12/shutdown-dbus.html) does not work
> at all, eg:

I think you’ll find it easier to use the ‘upower’ command, which does
something equivalent:

  $(guix build upower)/bin/upower --dump

Works for me on current GuixSD.

> $ dbus-send --system --print-reply --dest=org.freedesktop.ConsoleKit
> /org/freedesktop/ConsoleKit/Manager
> org.freedesktop.ConsoleKit.Manager.Stop
>
> Error org.freedesktop.DBus.Error.ServiceUnknown: The name
> org.freedesktop.ConsoleKit was not provided by any .service files

That’s expected: we don’t use ConsoleKit (it’s deprecated.)

> $ dbus-send --print-reply --system --dest=org.freedesktop.UPower
> /org/freedesktop/UPower org.freedesktop.UPower.Suspend
>
> Error org.freedesktop.DBus.Error.UnknownMethod: Method "Suspend" with
> signature "" on interface "org.freedesktop.UPower" doesn't exist
>
> Is this because dbus / polkit is currently misconfigured?

Good question, I’m not sure what’s going on here.  Stracing dbus-daemon
doesn’t reveal anything obvious.

Anyone D-Bus-savvy has ideas?

> Is there anything I can do about it? I'm guessing the incapability of
> the xfce power menu to function is related to this.

Probably.

Thanks,
Ludo’.

Re: Unprivileged power managing in GuixSD: dbus-send not working

[swedebugia]

On 2016-01-31 11:27, ludo@gnu.org wrote:
> swedebugia@riseup.net skribis:
> 
>> I'm using GuixSD with xfce recently pulled, reconfigured and 
>> restarted.
>> 
>> I have found that power managing dbus-send commands (from
>> http://andrusiv.com/blog/2011/12/12/shutdown-dbus.html) does not work
>> at all, eg:
> 
> I think you’ll find it easier to use the ‘upower’ command, which does
> something equivalent:
> 
>   $(guix build upower)/bin/upower --dump
> 
> Works for me on current GuixSD.
> 
>> $ dbus-send --system --print-reply --dest=org.freedesktop.ConsoleKit
>> /org/freedesktop/ConsoleKit/Manager
>> org.freedesktop.ConsoleKit.Manager.Stop
>> 
>> Error org.freedesktop.DBus.Error.ServiceUnknown: The name
>> org.freedesktop.ConsoleKit was not provided by any .service files
> 
> That’s expected: we don’t use ConsoleKit (it’s deprecated.)
> 
>> $ dbus-send --print-reply --system --dest=org.freedesktop.UPower
>> /org/freedesktop/UPower org.freedesktop.UPower.Suspend
>> 
>> Error org.freedesktop.DBus.Error.UnknownMethod: Method "Suspend" with
>> signature "" on interface "org.freedesktop.UPower" doesn't exist
>> 
>> Is this because dbus / polkit is currently misconfigured?
> 
> Good question, I’m not sure what’s going on here.  Stracing dbus-daemon
> doesn’t reveal anything obvious.
> 
> Anyone D-Bus-savvy has ideas?
> 
>> Is there anything I can do about it? I'm guessing the incapability of
>> the xfce power menu to function is related to this.
> 
> Probably.

Searching around with 'upower test' I found this to test dbus objects:
https://github.com/martinpitt/python-dbusmock

do we have any test that verify upower working as expected yet? If not 
this program might be of help.

cheers
sdb