Version: (using KDE 4.3.4) Compiler: gcc 4.4.2 OS: Linux Installed from: Archlinux Packages Snow desktop effect prevents new applications from loading or drastically increases the time it takes to load new applications. CPU or memory usage doesn't seem to increase but as soon as snow is turned on no applications will load. I was able to reduce the severity of the problem bylimiting the number of snow flakes to less than 50 and use 3px or less snow flakes. Reproduced the problem on my yonah 1.6Ghz laptop with 1 gig memory and intel 945gm, merom 1.8 ghz laptop with 2 gigs memory and intel 965gm, and 2.4Ghz conroe with 2 gigs memory and nvidia 9800gt. I have no problem running compiz or enlightenment snow on any of these systems.
The snow effect is the effect which requires most ressources, as it triggers constant full repaints and needs to calculate the new snow positions. In case of NVIDIA proprietary driver the second part can be done on the graphics card instead of the CPU. So yes for your Intel Systems I can imagine that it slows down the system and on such a low end system I would not use the effect. But as you also mention the nvidia card I have to ask what other effects do you use?
I tried this to see what was the effect here. When I enabled the snow-effect. Kwin used around 30%cpu. But the load time of new aplications was not really affected (it was somewhat slower perhaps, but there was offcourse a high cpu usage also). I'm using an nvidia card 8600M GT with the latest drivers 190.42
waiting for info about other effects as snow is slow but should not have performance impact on other applications.
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This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!