[Bug 166518] New: High system load when desktop effects are enabled

[mstarkey at wcsgabon.org]

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http://bugs.kde.org/show_bug.cgi?id=166518         
           Summary: High system load when desktop effects are enabled
           Product: plasma
           Version: unspecified
          Platform: Compiled Sources
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: panel-devel kde org
        ReportedBy: mstarkey wcsgabon org


Not sure if this is kwin or plasma, but with an empty session (no applications 
or widgets) I get a sustained system load of about 1.16 if desktop effects are 
enabled (on a 2Ghz Core Duo, 2Gb Ram ATI X1600 with fglrx driver, using OpenGL 
rendering), with X using about 25% (and sometimes 60%) of CPU and kwin 11-20% 
and plasma 8-11% . This really wrecks battery life, and makes my laptop run 
hot. System load basically disappears if desktop effects are disabled. I have 
tried enabling and disabling the desktop effects one by one to isolate, but I 
get the same load even if all other effects are disabled and only the 'enable 
desktop effects' box is enabled so it doesn't seem to be associated with one 
effect in particular.

This didn't happen with other recent builds, so must be due to a recent change 
- I am using  rev 830974.

Please let me know whether and how I can provide more useful information.

best
M.