Bug 344209

Summary:	kded uses 100% with 4 monitors
Product:	[Plasma] plasmashell	Reporter:	Alexander Nestorov <alexandernst>
Component:	generic-multiscreen	Assignee:	Aleix Pol <aleixpol>
Status:	RESOLVED FIXED
Severity:	grave	CC:	alexandernst, kde
Priority:	NOR
Version:	5.2.0
Target Milestone:	1.0
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Alexander Nestorov 2015-02-15 21:28:59 UTC

I have 2 NVIDIA GT6xx cards using nouveau driver and 4 monitors. The cards are not in SLI, so I use "xrandr --setprovideroutputsource 1 0" to make all monitors usable (see bug https://bugs.kde.org/show_bug.cgi?id=343900 ).

Anyways, as soon as I enable the 3rd and the 4th monitor, kded starts using 100% of 1 of my cores.

I'm leaving this as grave as my entire desktop is left in an unusable state when I enable all my monitors.

Reproducible: Always

Comment 1 Alexander Nestorov 2015-02-15 21:47:35 UTC

I understand that such a setup is not that common and maybe no KDE devs can get such an environment to debug the bug, and as this is very important for me (it conflicts with my daily work needs) I'm willing to help debug. I will follow any guidance/steps you need me to do in order to get this fixed as soon as possible.

(Please don't get me wrong, I'd help debug all bugs I have reported and the ones other people have reported, but sadly I don't have the time).

Comment 2 Kai Uwe Broulik 2015-02-15 22:03:16 UTC

Can you verify whether this comes from PowerDevil (ie. disable "Power Management" in System Settings → Startup and shutdown → Background services)? If so, this has been fixed for 5.2.1.

Comment 3 Alexander Nestorov 2015-02-15 22:06:47 UTC

I disabled power management,, but the bug is still present.

Comment 4 Alexander Nestorov 2015-02-15 22:36:21 UTC

Oh, actually that did fix the bug, I just had to reboot.