** Changed in: unity
Milestone: 7.3.2 => 7.3.3
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https://bugs.launchpad.net/bugs/1067349
Title:
Unity is sluggish and uses a lot of CPU (even with hardware support)
on low-end systems
Status in Unity:
Confirmed
Status in unity package in Ubuntu:
Confirmed
Bug description:
I asked this question already on Askubuntu, but was directed to file a
bug: I have a nice Lenovo Thinkpad Edge 11 AMD Neo II with a ATI
Radeon 4225 integrated graphics device. In my perception this is
already a not-so-lowspeced device, but still a netbook.
Up to Ubuntu 12.04 precise pangolin I preferred Unity2D over Unity
mainly because it did perform much better than Unity and moreover I
was able to achieve 5-6h with one battery charge. The typical load of
an idling desktop settled around 0.00 to 0.02.
Yesterday I tried the new Beta 2 of Ubuntu Quantal Quetzal: This does
no longer offer a Unity2D version. The performance itself has
definitely improved over Unity in precise, but nevertheless I do
experience now a minimum load of 0.24 to 0.36 while completely idling.
According to top this is mainly due to compiz eating about 3-6% CPU
all the time.
In comparison to my Unity2D experience, quantal is more sluggish, eats
much faster my battery and produces significant more fan noise. I
already tried a few tweaks like static blurring, fast texture renderer
or choosing alternate window manager on precise, but without a
significant change.
Are there ways which enable me to continue to use Ubuntu/Unity on my device
without major loss of functionality, performance and battery life?
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ApportVersion: 2.6.1-0ubuntu6
Architecture: i386
CompizPlugins:
[core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,workarounds,scale,expo,ezoom]
DistroRelease: Ubuntu 12.10
MarkForUpload: True
Package: unity 6.8.0-0ubuntu2
PackageArchitecture: i386
ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
Tags: quantal running-unity
Uname: Linux 3.5.0-18-generic i686
UpgradeStatus: Upgraded to quantal on 2012-11-06 (0 days ago)
UserGroups: adm admin audio cdrom floppy fuse kvm lpadmin netdev plugdev tape
video
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