Bug 360892

Summary: Plasma hangs when tooltip/popup is shown
Product: [Plasma] plasmashell Reporter: Igor Poboiko <igor.poboiko>
Component: generalAssignee: David Edmundson <kde>
Status: RESOLVED WORKSFORME    
Severity: normal CC: bshah, plasma-bugs-null, raul338
Priority: NOR    
Version First Reported In: 5.6.0   
Target Milestone: 1.0   
Platform: Gentoo Packages   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Igor Poboiko 2016-03-23 10:30:34 UTC 
If I hover mouse over any taskbar item, a tooltip is shown. Right after that, whole system freezes for about 60 seconds (I can say that looking on my clock applet, which jumps to current time when system unfreezes). During the freeze I still can move my mouse around, but I cannot do anything else, I cannot even switch to console to see what happens. 
I was able to connect to my laptop from another computer via ssh, and "top" showed "X" process eating 100% CPU during the freeze.
Surprisingly, it happens even when I disable compositing!
It also happens when I want any popup to be shown, not just a tooltip (e.g I expand system tray, or look at plasma-nm applet, or devices widget). And it also happens with Application Dashboard widget, which isn't a popup but a fullscreen widget.

Reproducible: Sometimes

Steps to Reproduce:
Moving mouse around taskbar to create several different tooltips freezes the system, but sometimes not after the first tooltip.



I have following graphics system:
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b)
09:00.0 3D controller: NVIDIA Corporation GK208M [GeForce GT 730M] (rev ff)
My primary graphics device is intel. I use xf86-video-intel 2.99.917 and Mesa 11.1.2.
Comment 1 Raúl Arellano 2016-03-29 14:39:27 UTC 
I think I'm having the same issue, just when updated plasma 5.6 on KaOSx
When log-in, open kick-off, connect an external drive (popup appear), sometimes the system hangs for a couple of seconds.

Graphics:  Card: Intel 2nd Generation Core Processor Family Integrated Graphics Controller
           Display Server: X.Org 1.18.2 driver: intel Resolution: 1920x1080@60.00hz
           GLX Renderer: Mesa DRI Intel Sandybridge Mobile GLX Version: 3.0 Mesa 11.1.2
xf86-video-intel 2.99.917.4-1

Just comment to subscribe.
Comment 2 Igor Poboiko 2016-03-29 15:18:36 UTC 
I've just upgraded xf86-video-intel (from 2.99.917_p20160316 to 2.99.917_p20160324 --- that is how it's called in Gentoo Portage Tree), and that issue disappeared. Apparently it was some bug in Intel drivers.

The new xf86-video-intel is based on rev. 39fbae3c61cc2d78ac5e7c5c471d161fafd53400, while previous was based on rev. 74cd4d09ae051d3a1f4cb9fe29e656b044f03ece (I refer to commit IDs from Git: https://cgit.freedesktop.org/xorg/driver/xf86-video-intel/tree/). 
Hope this helps.
Comment 3 Raúl Arellano 2016-03-29 16:08:33 UTC 
Yes, I just build from that commit, running the system 1 hour and everything is working well. Even more smooth and faster than before.

Thanks. I thin this can be closed now