Version: (using Devel) Installed from: Compiled sources Compiler: gcc 4.3 OS: Linux Enable desktop effects and under the advanced options choose xrender. Close system settings completely. Then go back to system settings, and try to change the XRender smooth scaling option in Desktop Effects. The apply button does not get enabled. Click on OK. Click again on the button Advanced Option: the Xrender smooth scaling checkbox is back to the previous configuration. kdelibs4-core-4.0.81-1mdv2009.0 kdebase4-workspace-debug-4.0.81-2mdv2009.0 kdebase4-debug-4.0.81-1mdv2009.0 kdebase4-4.0.81-1mdv2009.0 kdebase4-workspace-4.0.81-2mdv2009.0 kdelibs4-debug-4.0.81-1mdv2009.0 kdebase4-runtime-4.0.81-1mdv2009.0 kdebase4-runtime-debug-4.0.81-1mdv2009.0 kdelibs4-core-4.0.81-1mdv2009.0 kdebase4-workspace-debug-4.0.81-2mdv2009.0 kdebase4-debug-4.0.81-1mdv2009.0 kdebase4-4.0.81-1mdv2009.0 kdebase4-workspace-4.0.81-2mdv2009.0 kdelibs4-debug-4.0.81-1mdv2009.0 kdebase4-runtime-4.0.81-1mdv2009.0 kdebase4-runtime-debug-4.0.81-1mdv2009.0
KDE 4.1.00 (KDE 4.0.99 (4.1 RC1+)) (KDEmod) in ArchLinux I can reproduce this bug
This seems to be fixed using: Qt: 4.4.3 KDE: 4.1.82 (KDE 4.1.82 (KDE 4.2 >= 20081204)) kdelibs svn rev. 895205 / kdebase svn rev. 895205
Fixed here using: Qt: 4.4.3 + qt-copy-patches-889120 KDE: 4.1.86 (KDE 4.1.86 (KDE 4.2 >= 20081221)) kdelibs svn rev. 903451 / kdebase svn rev. 903451 on ArchLinux x86_64 - Kernel 2.6.27.10
Bulk change: move all KWin kcm bugs to product kwin