Unity

Unity's constant whole-screen damaging uses a lot of CPU-cycles and energy, is not efficient and slows rendering down

Bug #1182803 reported by MC Return
40
This bug affects 8 people
Affects Status Importance Assigned to Milestone
Compiz
Confirmed
High
Unassigned
Compiz 0.9.11.0
Unity
Confirmed
Undecided
Unassigned

Bug Description

[How to reproduce]

1. Enable the showrepaint plugin in CCSM to be able to observe the damaging
2. Change the clock to show seconds also, or better "sudo apt-get install indicator-multiload"
3. Once indicator-multiload runs, activate showrepaint

[What you would expect to happen]

Unity/Compiz should damage the parts of the screen that are redrawing only, just like the other Compiz plugins do.

[What actually happens]

Unity constantly damages the whole screen, wasting a lot of energy and being completely energy-inefficient.
The problem gets worse if you add additional displays to your configuration.

Workaround:
Disable unityshell.

See original description
Tags: performance
MC Return (mc-return)
description: updated
summary: - Unity's constant whole-screen damaging uses a lot of CPU-cycles, wastes
- a lot of energy and is not efficient
+ Unity's constant whole-screen damaging uses a lot of CPU-cycles and
+ energy, is not efficient and slows rendering down
Leuke (leuke)
tags: added: performance
Revision history for this message
Iven Hsu (ivenvd) wrote :

I'm not using unity, but my screen keeps fullscreen redrawing. How can I see which plugin is causing this problem?

PS: I'm not using the "Workaround" Plugin.

Revision history for this message
MC Return (mc-return) wrote :

@ivend:
Turn them off one by one, and check the damaging with the "Show Repaint" plugin
 Note that other docks/programs can cause damage events also, so I would recommend also killing other programs drawing on the screen one by one to find the culprit.

B Bobo (yout-bobo123)
Changed in unity:
status: New → Confirmed
Changed in compiz:
status: New → Confirmed
MC Return (mc-return)
Changed in compiz:
milestone: none → 0.9.10.0
importance: Undecided → High
Sam Spilsbury (smspillaz)
Changed in compiz:
milestone: 0.9.10.0 → 0.9.10.2
MC Return (mc-return)
Changed in compiz:
milestone: 0.9.10.2 → 0.9.11.0
Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Forgive the confusing jargon, but this is actually bug 1080947.

To post a comment you must log in.
This report contains Public information  
Everyone can see this information.
Subscribing...

Other bug subscribers

Related blueprints

Remote bug watches

Bug watches keep track of this bug in other bug trackers.