it's not possible to switch in kde to the opengl compositing type after the media-libs/mesa-9.1.2-r1 update. It only possible to use the XRender. gpu: i915 Reproducible: Always
merging mesa with VIDEO_CARDS="i915 i965 intel" solved the problem - but why is i965 needed for an i915 card? dmesg |grep i915 [ 0.000000] Kernel command line: root=/dev/sda2 raid=noautodetect pcie_aspm=force i915.i915_enable_fbc=1 i915.lvds_downclock=1 i915.i915_enable_rc6=7 [ 0.456725] i915 0000:00:02.0: setting latency timer to 64 [ 0.489588] i915 0000:00:02.0: irq 42 for MSI/MSI-X [ 0.596661] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit banging on pin 5 [ 1.361488] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device [ 1.361514] i915 0000:00:02.0: registered panic notifier [ 1.377425] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
Do not confuse the kernel driver called i915 (which drives all modern Intel chipsets) with the mesa driver. Given your kernel commandline parameters, I consider it highly unlikely that you have an actual i915 (or 945) chipset which are the only ones that the mesa i915 driver is responsible for.
