Bug 857343 - When resuming from hibernation, num lock led blink and killing gnome-settings-daemon resolves the problem
When resuming from hibernation, num lock led blink and killing gnome-settings...
Product: Fedora
Classification: Fedora
Component: gnome-settings-daemon (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
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Assigned To: Bastien Nocera
Fedora Extras Quality Assurance
Depends On:
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Reported: 2012-09-14 03:23 EDT by Mildred
Modified: 2013-07-31 17:03 EDT (History)
6 users (show)

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Doc Type: Bug Fix
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Last Closed: 2013-07-31 17:03:23 EDT
Type: Bug
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Description Mildred 2012-09-14 03:23:37 EDT
Description of problem: When resuming from hibernation, sometimes, the num lock led blink very fast. It's easy to mistake the LED being either enabled or disabled. Ifyou press numlock, you can see it changes the led status but very quickly, then it changes again. If you have digits in your password, it's easy to mistype the password and to wonder why you can't log in back.

Workaround: log in using the digits on the alphanumeric keyboard and killall gnome-settings-daemon. I'm using GNOME 3 and I didn't notice any lack of functionnality afterwards, nor any style change.

Version-Release number of selected component (if applicable): gnome-settings-daemon-3.4.2-3.fc17.i686 (but it's not new)

How reproducible: often
Steps to Reproduce: hibernate then resume
Actual results: Num Lock LED blinks
Expected results: no blinking

Additional info: I heard one of my coworkers having the same problem on a computer installed completely differently. It might be a Fedora or not, I don't remember. It should rule out a configuration problem in my profile.
Comment 1 Josh Stone 2012-09-25 19:32:19 EDT
I'm experiencing a similar problem, though not related to hibernation.

Mine appears to be because GNOME remembered a previous login where I had numlock off, then as soon as I started synergyc to my main computer where numlock was on, then gnome-settings-daemon started burning >100% CPU and the numlock toggled on/off rapidly.  Also dconf-service burns ~20% CPU.  My solution was to manually turn numlock on first, then connect synergyc, and now they aren't fighting.

However, if I ever toggle numlock while synergy is connected, then it all goes haywire again and I have to log out and carefully restore the balance.  Even killing synergyc is not enough.  My guess is there may be a race between something updating the numlock preference versus restoring the old preference, and when they get out of step it results in constant toggling.

For your situation, perhaps see if you also have some program that's manipulating numlock the way synergyc is for me.  It may just be the hibernation/resume processes doing it though.
Comment 2 Mildred 2012-10-11 04:21:04 EDT
Happened again.

I have now two gnome-settings-daemon services fighting for num lock, each with their own dconf-service daemon.

One gnome-service-daemon has:
- PID: 1459
- Time: 27 min

The other:
- PID: 1468
- Time: 11 min

I checked in the /proc filesystem, both have the same environment variables (environ file), the same command line and the same working directory.

When I kill one of the gnome-settings-daemon, the num lock blinking is fixed.

It might be a bug in gnome-settings-daemon that do not check it is already running. There should be some kind of lock I assume.
Comment 3 Hannes Frederic Sowa 2012-10-19 16:54:21 EDT
I also see strange things happening with my num lock. Especially under higher loaded systems, when I press num lock to verify that my kernel did not get hung, I see endless toggling of the led and high cpu load of gnome-settings-daemon.

I now tried to avoid this problem by toggling
org.gnome.settings-daemon.peripherals.keyboard/remember-numlock-state to false.

Did not happen since then, but I did not thoroughly verified this.

This is a truly annoying bug.
Comment 4 Hannes Frederic Sowa 2012-10-19 17:34:24 EDT
Above workaround doesn't help, sorry. It just happened again. If this is the same problem (I guess), it is pretty easily reproduceable: Just bring your machine to swap(in my case pretty big mmap+updates) until it does not really react to num lock any more. After the load calms down, num lock won't stop blinking and g-s-d has 100% cpu load.
Comment 5 ernest.beinrohr 2013-03-30 13:24:44 EDT
Blinking numlock LED here too. No Gnome3, i'm using mate-desktop with some kde3 (trinity) apps.

After killing 'mate-settings-daemon' the LED started acting normal again.

fc17, mate 1.5
Comment 6 Fedora End Of Life 2013-07-03 16:44:28 EDT
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Comment 7 Fedora End Of Life 2013-07-31 17:03:31 EDT
Fedora 17 changed to end-of-life (EOL) status on 2013-07-30. Fedora 17 is 
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