Bug 1476622

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Downgrading upower makes mate-power-manager starts normally.

I can't reproduce as my laptop doesn't have keyboard brightness.
But you said with upower-0.99.4-4 all is good?

Yes!
I'm using the version written above.
When i update to version 0.99.5-1 the problem filled in this bug appears.

There are signal changes in upower-0.95
https://cgit.freedesktop.org/upower/log/?qt=grep&q=keyboard
As always only added to gnome -_-
https://git.gnome.org/browse/gnome-settings-daemon/log/?qt=grep&q=keyboard

This can take some time until MATE upstream has implement those changes.

Ok, i wait the MATE update.
Thanks Wolfgang!

*** Bug 1476802 has been marked as a duplicate of this bug. ***

*** Bug 1475410 has been marked as a duplicate of this bug. ***

Similar problem has been detected:

Initial logon.

reporter:       libreport-2.8.0
backtrace_rating: 4
cmdline:        mate-power-manager
crash_function: gpm_kbd_backlight_on_dbus_signal
executable:     /usr/bin/mate-power-manager
global_pid:     2479
kernel:         4.11.12-200.fc25.x86_64
package:        mate-power-manager-1.18.0-1.fc25
pkg_fingerprint: 4089 D8F2 FDB1 9C98
pkg_vendor:     Fedora Project
reason:         mate-power-manager killed by SIGABRT
runlevel:       N 5
type:           CCpp
uid:            1000

Similar problem has been detected:

Initial logon in mate.

reporter:       libreport-2.8.0
backtrace_rating: 4
cmdline:        mate-power-manager
crash_function: gpm_kbd_backlight_on_dbus_signal
executable:     /usr/bin/mate-power-manager
global_pid:     2140
kernel:         4.11.12-200.fc25.x86_64
package:        mate-power-manager-1.18.0-1.fc25
pkg_fingerprint: 4089 D8F2 FDB1 9C98
pkg_vendor:     Fedora Project
reason:         mate-power-manager killed by SIGABRT
runlevel:       N 5
type:           CCpp
uid:            1000

*** Bug 1480222 has been marked as a duplicate of this bug. ***

Upstream Mate bugs:
https://github.com/mate-desktop/mate-power-manager/issues/225
https://github.com/mate-desktop/mate-power-manager/issues/226

This is a pretty serious regression for MATE. The desktop just hangs and is unusable. Probably mystifying for most MATE users. Could this be reverted until it's fixed? If GNOME works with upower 0.99.4 that would be a sensible course of action.

I'm seeing the same problem on all my Lenovo thinkpads: T420, W530, T460, P50 running Fedora 26 (and 25). Downgrading to upower 0.99.4-2 seems to avoid the problem. I'm blacklisting upower update until this is fixed.

Can someone please test this scratch build?
https://koji.fedoraproject.org/koji/taskinfo?taskID=21264244

This should fix the crash of mate-power-manager but not the wrong dbus signal.
But all other functions of m-p-m should work again than.

(In reply to Paul Jakma from comment #23)
> This is a pretty serious regression for MATE. The desktop just hangs and is
> unusable. Probably mystifying for most MATE users. Could this be reverted
> until it's fixed? If GNOME works with upower 0.99.4 that would be a sensible
> course of action.

You can try to file out a report against upower.
I'd like to see a downgrade too, but i am in doubt the upower/gnome developers will do that for a secondary desktop.

That seems to fix the crash for me. Now mpm survives unplugging and replugging the power cable, and suspend/resume. Brightness, lock and suspend keys working on thinkpad x230. Thanks.

mate-power-manager-1.18.0-2.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2017-cfcc51101d

(In reply to Fedora Update System from comment #27)
> mate-power-manager-1.18.0-2.fc26 has been submitted as an update to Fedora
> 26. https://bodhi.fedoraproject.org/updates/FEDORA-2017-cfcc51101d

how about Fedora 25? has the same issue... and still have some life left.

Ohh, upower was updated in f25 too?

(In reply to Wolfgang Ulbrich from comment #29)
> Ohh, upower was updated in f25 too?

i believe so:

$ cat /etc/fedora-release ; rpm -qa upower
Fedora release 25 (Twenty Five)
upower-0.99.5-1.fc25.1.x86_64

mate-power-manager-1.18.0-2.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/updates/FEDORA-2017-837ae487a1

mate-power-manager-1.18.0-2.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-837ae487a1

mate-power-manager-1.18.0-2.fc26 has been pushed to the Fedora 26 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-cfcc51101d

Similar problem has been detected:

After clean installation on ThinkPad x240 a clean user login the crash occures. As a result the screen does not go off after specified time. Also puttin to sleep by pressing a button does not work.

reporter:       libreport-2.9.1
backtrace_rating: 4
cmdline:        mate-power-manager
crash_function: gpm_kbd_backlight_on_dbus_signal
executable:     /usr/bin/mate-power-manager
journald_cursor: s=4c0638bbfe3e4643b2cb16c930f5c497;i=451d;b=943370273d0e4a5bb3fbe2a07c08df62;m=17816746b;t=557a95eb0b29b;x=12868cadc92d71b4
kernel:         4.12.8-300.fc26.x86_64
package:        mate-power-manager-1.18.0-1.fc26
reason:         mate-power-manager killed by signal 6
rootdir:        /
runlevel:       N 5
type:           CCpp
uid:            1002

mate-power-manager-1.18.0-2.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.

mate-power-manager-1.18.0-2.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.

Similar problem has been detected:

After update the mate-power-pannel keeps crashing after initial reboot or manual start. Error msg from command line:
ERROR:gpm-kbd-backlight.c:329:gpm_kbd_backlight_on_dbus_signal: code should not be reached

System: Dell Precision 5510

reporter:       libreport-2.8.0
backtrace_rating: 3
cmdline:        mate-power-manager
crash_function: gpm_kbd_backlight_on_dbus_signal
executable:     /usr/bin/mate-power-manager
global_pid:     4927
kernel:         4.12.8-200.fc25.x86_64
package:        mate-power-manager-1.18.0-1.fc25
pkg_fingerprint: 4089 D8F2 FDB1 9C98
pkg_vendor:     Fedora Project
reason:         mate-power-manager killed by SIGABRT
runlevel:       N 5
type:           CCpp
uid:            1000