Linked by Thom Holwerda on Thu 26th May 2011 21:27 UTC, submitted by poundsmack
KDE "KDE has released a first beta of the upcoming 4.7 release of the Plasma Desktop and Netbook workspaces, the KDE Applications and the KDE Frameworks, which is planned for July 27, 2011. With API, dependency and feature freezes in place, the KDE team's focus is now on fixing bugs and further polishing new and old functionality."
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RE[8]: kwin performance
by lemur2 on Tue 31st May 2011 03:37 in reply to "RE[7]: kwin performance"
lemur2 Member since:
2007-02-17



On the topic of the removal of the binary blob graphics drivers for nvidia from Arch Linux, I did an experiment for kwin with the open source (Gallium3D) ATI drivers. This should also yeild similar gains with the open source nouveau driver.

The 3D openGL performance of the open source drivers isn't up to snuff yet, but the 2D acceleration is fine. So, what I did was in the desktop settings I set the compositor to use Xrender (which is 2D only).

The effect was that certain types of desktop bling, which use 3D graphics, were no longer available. I could no longer use the desktop cube animation when switching virtual desktops, for example.

The gain, however, for that small scrifice, was considerable. With the open source drivers, using the 2D-only Xrender for desktop compositing instead of OpenGL gave me a very nice performance boost (at this time). One finally does get the benefit of a hardware-accelerated desktop rendering.

Reply Parent Score: 2

RE[9]: kwin performance
by lemur2 on Tue 31st May 2011 05:51 in reply to "RE[8]: kwin performance"
lemur2 Member since:
2007-02-17

On the topic of the removal of the binary blob graphics drivers for nvidia from Arch Linux, I did an experiment for kwin with the open source (Gallium3D) ATI drivers. This should also yeild similar gains with the open source nouveau driver. The 3D openGL performance of the open source drivers isn't up to snuff yet, but the 2D acceleration is fine. So, what I did was in the desktop settings I set the compositor to use Xrender (which is 2D only). The effect was that certain types of desktop bling, which use 3D graphics, were no longer available. I could no longer use the desktop cube animation when switching virtual desktops, for example. The gain, however, for that small scrifice, was considerable. With the open source drivers, using the 2D-only Xrender for desktop compositing instead of OpenGL gave me a very nice performance boost (at this time). One finally does get the benefit of a hardware-accelerated desktop rendering. "

Apparently I am not the first to discover this, and also apparently the Xrender compositor works better than OpenGL even for some people using binary blob drivers:

http://linuxology.wordpress.com/2010/01/16/interesting-discovery-xr...

http://kubuntuforums.net/forums/index.php?topic=3099721.0

As an additional benefit, using the Xrender compositor seems to result in the desktop compositing having no impact on other uses of the GPU, such as playing games or rendering video.

Reply Parent Score: 2