From: ludo@gnu.org (Ludovic Courtès)
To: 22565@debbugs.gnu.org
Cc: swedebugia@riseup.net, request@debbugs.gnu.org
Subject: bug#22565: Cannot talk to upowerd over D-Bus
Date: Sun, 07 Feb 2016 15:49:56 +0100 [thread overview]
Message-ID: <871t8oy3qj.fsf@gnu.org> (raw)
In-Reply-To: <87powbgrdi.fsf@gnu.org> ("Ludovic \=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\= \=\?utf-8\?Q\?s\?\= message of "Fri, 05 Feb 2016 15:32:09 +0100")
tags 22565 notabug
close 22565
thanks
ludo@gnu.org (Ludovic Courtès) skribis:
> On GuixSD as of v0.9.0-1430-g234ea8a, attempts to talk to upowerd over
> D-Bus fail:
>
> $ sudo 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
>
> See
> <https://lists.gnu.org/archive/html/guix-devel/2016-01/msg01004.html>.
Actually the above method simply does not exist (the blog post
at <http://andrusiv.com/blog/2011/12/12/shutdown-dbus.html> is several
years old.)
If we invoke methods that do exist, everything is fine:
--8<---------------cut here---------------start------------->8---
$ dbus-send --print-reply --system --dest=org.freedesktop.UPower /org/freedesktop/UPower org.freedesktop.UPower.GetCriticalAction
method return time=1454855982.307374 sender=:1.1 -> destination=:1.51 serial=449 reply_serial=2
string "PowerOff"
$ dbus-send --print-reply --system --dest=org.freedesktop.UPower /org/freedesktop/UPower org.freedesktop.UPower.GetDisplayDevice
method return time=1454855987.010638 sender=:1.1 -> destination=:1.52 serial=450 reply_serial=2
object path "/org/freedesktop/UPower/devices/DisplayDevice"
$ dbus-send --print-reply --system --dest=org.freedesktop.UPower /org/freedesktop/UPower org.freedesktop.UPower.EnumerateDevices
method return time=1454856012.554536 sender=:1.1 -> destination=:1.53 serial=451 reply_serial=2
array [
object path "/org/freedesktop/UPower/devices/line_power_AC"
object path "/org/freedesktop/UPower/devices/battery_BAT0"
]
--8<---------------cut here---------------end--------------->8---
The thing is, poweroff/suspend/hibernate is now delegated to logind (see
src/linux/up-backend.c in UPower.)
Indeed, the ‘loginctl’ command (or, presumably, other elogind clients
such as GNOME or Xfce) can talk to elogind:
--8<---------------cut here---------------start------------->8---
$ loginctl suspend
Failed to suspend: Interactive authentication required.
--8<---------------cut here---------------end--------------->8---
I suppose we need some polkit magic to allow unprivileged users to
invoke those actions, but that’s a different issue.
Thanks,
Ludo’.
next prev parent reply other threads:[~2016-02-07 14:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-05 14:32 bug#22565: Cannot talk to upowerd over D-Bus Ludovic Courtès
2016-02-07 14:49 ` Ludovic Courtès [this message]
2016-02-17 22:03 ` Ricardo Wurmus
2016-02-21 22:47 ` Ludovic Courtès
2016-02-29 7:13 ` Ricardo Wurmus
2016-02-29 9:29 ` Ludovic Courtès
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://guix.gnu.org/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=871t8oy3qj.fsf@gnu.org \
--to=ludo@gnu.org \
--cc=22565@debbugs.gnu.org \
--cc=request@debbugs.gnu.org \
--cc=swedebugia@riseup.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/guix.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).