Bug 305179

Summary:	100% CPU use in Inkscape when using the oxygen style
Product:	[Plasma] Oxygen	Reporter:	Médéric Boquien <mboquien>
Component:	gtk2-engine	Assignee:	Hugo Pereira Da Costa <hugo.pereira.da.costa>
Status:	CONFIRMED ---
Severity:	normal	CC:	b7.10110111, hugo.pereira.da.costa, web
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	unspecified
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Médéric Boquien 2012-08-15 07:52:25 UTC

Under specific circumstances, inkscape/X take 100% of the CPU when using the oxygen style.

Reproducible: Always

Steps to Reproduce:
1. Create any kind of shape in inkscape. Say a rectangle.
2. Apply a filter on this shape from the FIlters menu
3. Open the filter editor Filters/filter editor
Actual Results:  
Inkscape/X take 100% of the CPU because it redraws constantly the upper right box in the editor where there are the  "Effect" and "Connections" columns along with a connections diagram.

Expected Results:  
No extra CPU is used compared to the default gtk style.

Comment 1 Ruslan Kabatsayev 2012-08-17 10:39:25 UTC

How did you determine that it redraws that box?

Comment 2 Médéric Boquien 2012-08-17 10:42:59 UTC

Hello,

I used the kwin "Show Paint" plugin.

Regards,

Médéric

Comment 3 Ruslan Kabatsayev 2012-08-17 11:23:51 UTC

OK, I can reproduce. It's because of our inner shadows hack. Meanwhile you can disable the hack by setting OXYGEN_DISABLE_INNER_SHADOWS_HACK env var to some value before running inkscape, if your performance drop is too severe to use it.

Comment 4 Hugo Pereira Da Costa 2012-08-29 09:32:56 UTC

can reproduce also
Now this is a heavily customized widget.
I suspect an actual bug in the widget itself.
As soon as we connect to the targetExpose event, even when doing nothing in there, the recursive painting occurs.
We'll likely have to dig into inkscape code to figure out more.
For the record:
widget is a gtkmm__GtkScrolledWindow, child is a gtkmm__GtkTreeView.
Now, the list on the left of the guilty widget has the same signature, and does not show the problem.

Will investigate further.

Comment 5 Justin Zobel 2021-03-09 23:58:32 UTC

Thank you for the bug report.

As this report hasn't seen any changes in 5 years or more, we ask if you can please confirm that the issue still persists.

If this bug is no longer persisting or relevant please change the status to resolved.

Comment 6 Ruslan Kabatsayev 2021-03-10 06:39:38 UTC

Still reproducible with Oxygen-GTK 1.4.6-60-ga507b85c from Ubuntu 20.04 repo and Inkscape 0.92.5 from the same repo.