kded4 eating up the CPU

[gavdari]

I've just upgraded to Natty and I have a rather serious problem. At times, the CPU usage of kded4 goes up to 100%, I have to kill it with kill -9 or it will cause kubuntu to completely freeze, making me unable to even move my mouse pointer. Usually kded4 is normal at boot time. I am not able to exactly reproduce the problem, but it seems that it happens when I do something with the network manager and/or connecting to a PPTP virtual network. I tried switching to GNOME network manager and network-manager-kde but nothing changed. Any idea?

UPDATE: Seems like it happens when I disconnect a VPN connection.

[bdhamp]

Re: kded4 eating up the CPU

I am having the same or a similar issue. It also occurs on a disconnect from a VPN, though I have experienced it at other times as well. I was not paying close enough attention prior to this upgrade to know all the different circumstances under which it occurred. Currently, it results in a strange sort of frozen desktop. All plasma activities are frozen. Windows cannot be moved. Notifications are stuck, etc. I cannot start programs except through a terminal. But, I can still type this message and work within Firefox or any other windows that are open.

kded4 pegs one processor core at 99%-100% and destroys the responsiveness of the whole system. Since the 11.04 upgrade it happens every time I disconnect from a VPN.

Prior to upgrade I could usually (but not always) kill kded4 with signal 9 and regain the desktop. Most often, I had to restart X. Since the upgrade, I always have to restart X. I can still kill kded4, but this results in a crashed plasma that seems to get into a never-ending loop of crashes.

This is only one of about a hundred problems I have been experiencing since the upgrade, however. I've experience seemingly random total freezes that won't even allow me to switch to a terminal or SSH into the box, requiring a hard reset. So, I do not know if this is its own bug or a problem related to one of the other problems.

[gavdari]

Re: kded4 eating up the CPU

For the crashing desktop after killing kded4 with kill signal, just start kded4 again via terminal. In my case, it solves the problem. But it's a bit annoying to kill and then start again kded4 each time I disconnect from a vpn.
I am experiencing random freezes too, some times without disconnecting a vpn.
11.04 is one of the worst upgrades I've ever seen.

[pmwisse]

Re: kded4 eating up the CPU

I had the same problem when I used Natty for some time from USB-stick. It seemed to happen when I logged out from a 3g connection, so this suggests a more general problem with networkmanager. My setup was a clean one from USB, with Natty released version, 32 bits. I also loaded the 64 bits version but did not try the 3g connection.

It would be important to file a bug, because this keeps me from upgrading to Natty, which otherwise has very good features for my Medion E1315 (gallium 3d, which is a huge improvement on my rs690 ATI chip).

[ubuntuku]

Re: kded4 eating up the CPU

I can confirm this knetworkmanager bug, got the same issue here. Disabling networkmanagement module seems to fix the issue. So now I'm using nm-applet instead of knetworkmanager.

[wizard10000]

Re: kded4 eating up the CPU

<-- does not like network-manager. Even the current version loses a *wired* connection if I have to reboot my router, which makes no sense as I should still have an IP address. Using networkmanager if I reboot my router I have to issue

sudo dhclient eth0

to get my connection back. I use wicd even on wired connections.

[gavdari]

Re: kded4 eating up the CPU

It would be important to file a bug, because this keeps me from upgrading to Natty, which otherwise has very good features for my Medion E1315 (gallium 3d, which is a huge improvement on my rs690 ATI chip).

A bug is already filed: https://bugs.launchpad.net/ubuntu/+s...nt/+bug/759209

I can confirm this knetworkmanager bug, got the same issue here. Disabling networkmanagement module seems to fix the issue. So now I'm using nm-applet instead of knetworkmanager.

For me it didn't solve the problem. I will try again according to the tutorial you mentioned and post the results here. Thanks.

UPDATE: nm-applet didn't solve anything. kded4 is consuming the whole CPU after disconnecting from a vpn. Correct me if I'm wrong, but I had to install network-manager-gnome too.

[ubuntuku]

Re: kded4 eating up the CPU

I spoke too soon, the problem still exists. This has nothing to do with networkmanager. http://www.google.com/search?client=...utf-8&oe=utf-8

[jbernardo]

Re: kded4 eating up the CPU

I've been hit by the same kde4d bug with a 3G usb key...

[gavdari]

Re: kded4 eating up the CPU

Reinstalling natty from the scratch didn't solve the problem. The bug is still there.

[gjartin]

Re: kded4 eating up the CPU

Has happened to me when connecting USB mouse. Ctrl-Esc works, but I cannot kill kded4.

[jbernardo]

Re: kded4 eating up the CPU

This appears to be bug #220047 in kde.

[jbernardo]

Re: kded4 eating up the CPU

After more checks, it seems to be instead bug #263038.
The workaround, at least for me, is to edit /usr/share/kde4/services/kded/networkstatus.desktop and set X-KDE-Kded-autoload=false and X-KDE-Kded-load-on-demand=false, restarting kded4 afterwards.

[gavdari]

Re: kded4 eating up the CPU

I can confirm that the solution from jbernardo solves the problem, for now. Thanks.