Open-Source GPU Drivers Causing Headaches In KDE 4.5

[mat69]

I don't think Linux can afford killing its userbase by dropping hardware support. KDE obviously doesn't care.

Bullshit.
KDE is not dropping hardware support for anything. KWin devs do care that is why there are a lot of fallbacks if drivers report features as not supported...

All the features that worked before will continue to work.

If the KWin dev decided to write new features in OpenGL 3 because that is easier for him -- i.e. more time for something else -- how could this be bad?

[marek]

If the KWin dev decided to write new features in OpenGL 3 because that is easier for him -- i.e. more time for something else -- how could this be bad?

No problem there, I guess, provided "easier" doesn't mean "slower" in the end.

[marek]

If the KWin dev decided to write new features in OpenGL 3 because that is easier for him -- i.e. more time for something else -- how could this be bad?

It's also worth saying that Mesa and therefore all open source drivers will not probably support GL3 because GL3 depends on some patented technologies. For example, there are floating point textures and renderbuffers already implemented in a branch for Mesa but merging this branch is postponed until all related patent issues are resolved. We might as well end up being stuck with GL2 for a couple more years. No one knows.

[EvilTwin]

just read this at planetkde.org
http://blog.martin-graesslin.com/blo...sktop-effects/

[mugginz]

just read this at planetkde.org
http://blog.martin-graesslin.com/blo...sktop-effects/

That was a pretty good read. Thanks for the linky.

[bridgman]

Martin touched briefly on the topics discussed here (points 9, 10) and covered some but not all of the core issues :

- as a result of delays between introduction of DX standards and corresponding GL standards there are a lot of cards out there which "almost but not quite" meet GL 2.x requirements... put differently it means that the granularity of GL extensions doesn't align particularly well with the granularity of HW capabilities, particularly in the area of GL 2-ish HW (GL standard introduction has caught up as of GL4 so things should be better going forward)

- combine the first point with the fact that GL2 development is happening right now, and you are likely to get cases where extensions are enabled but not fully implemented (and is subject to regressions)... partly because of the granularity issue and partly because the GL 2 support is work-in-process

- the current (mostly temporary) situation argues for a bit more user/distro controllability of driver feature usage and maybe a bit less automatic extension-based configuration, simply because the extention reporting is *not* likely to be a reliable source of input in the short term

Otherwise looked like a real good post. Sounds like part of the problem comes from the fact that the distro Martin is using doesn't include driver support for his r700 hardware... fixing that seems like the "low hanging fruit" here. Anyways, this is one of those "everyone is working real hard, pointing fingers wastes everyone's time, but probably some slight tweak in direction/approach is required to make everything work happy" situations.

I HATE HATE HATE HATE HATE HATE HATE HATE that edit time limit. Just in case anyone didn't know that already.

[tball]

Okay well I just tried installed kde 4.5.1 (kubuntu maverick) with the latest radeon driver stack from xorg edgers. So far compositing works when disabling blur, but 2d performance is very sluggish?

Anyone else experience this? I would love to stay with kde, if just I can make 2d perform better.

[tball]

Now I have installed ubuntu-desktop also, and the 2d performance is a world to difference.

The 2d performance in gnome is much much more fluid, than it is in kde.

Does anyone have a clue why that can be? The 2d performance without compositing is also better in gnome, than it is in kde.

[hteles]

Okay well I just tried installed kde 4.5.1 (kubuntu maverick) with the latest radeon driver stack from xorg edgers. So far compositing works when disabling blur, but 2d performance is very sluggish?

Anyone else experience this? I would love to stay with kde, if just I can make 2d perform better.

Hi there.
What video adapter do you have? ( sorry if you already said that before )

My Output of: glxinfo |grep -i opengl
OpenGL vendor string: X.Org R300 Project
OpenGL renderer string: Gallium 0.4 on RV410
OpenGL version string: 2.1 Mesa 7.9-devel
OpenGL shading language version string: 1.20
OpenGL extensions:

I'm on vacations and briefly use the laptop except to check from updates in Lucid Maverick and check my email. Since a few days even the taskbar thumbnails started to work, don't rebember exactly when but they do work now.
As for the 2d perfomance, everything is fast.
Can you check that with the recent xorg/edgers updates?

[hal2k1]

Okay well I just tried installed kde 4.5.1 (kubuntu maverick) with the latest radeon driver stack from xorg edgers. So far compositing works when disabling blur, but 2d performance is very sluggish?

Anyone else experience this? I would love to stay with kde, if just I can make 2d perform better.

I have found a work-around.

http://kubuntuguide.org/Lucid#Kwin

Compiz Fusion

Compiz Fusion is also available as a separate Windows Manager to allow 3D desktop effects such as the rotating cube desktop. Some Kubuntu users choose to run Compiz instead of KWin. Install:

sudo apt-get install compiz compizconfig-settings-manager compiz-kde compiz-fusion-plugins-main compiz-fusion-plugins-extra emerald librsvg2-common

To change to Compiz as the Window Manager:

K menu -> System Settings -> Advanced -> Session Manager -> Window Manager -> Compiz

Note: You must logout and log back in for the change to take effect.

Select Compiz Configuration:

K menu -> Settings -> CompizConfig Settings Manager

Fusion Icon

Fusion Icon is a tray icon that allows you to easily switch between window managers (such as between KWin and Compiz), window decorators, and gives you quick access to the Settings Manager. This allows quick toggling of 3-D desktop effects (that may not be compatible with some applications).

sudo apt-get install fusion-icon

Start:
K menu -> System -> Compiz Fusion Icon

You can then easily access CompizConfig Settings Manager from the icon.
Rotate the Compiz Cube

Set the CompizConfig Settings Manager to enable the "Desktop Cube" and "Rotate Cube" and "Viewport Switching" options. Click on the icon for each to customize settings. For example, to change the appearance of the cube, click on the Desktop Cube icon to access its settings. You can set the hotkey buttons for rotating the cube in the "Viewport Switching" settings. Otherwise, hold down the Ctrl+Alt+Left mouse button and drag the mouse (or touchpad) the direction you want to rotate the cube.

Remember, the cube rotates between desktops. It's not a cube unless you have at least 4 desktops running. You will not get a cube if you are only using 2 desktops (you will get a "plate"). You can still rotate the sides of the plate, of course, but it will not be a cube. (Recent users from the Windows OS may have no experience with the concept of simultaneous desktops, but they are nice once you learn how to use them).

When running Compiz fusion as the Windows Manager, you must change the default number of desktops from within CompizConfig Settings Manger. To enable 4 desktops:

K menu -> System -> CompizConfig Settings Manager -> General -> General Options -> Desktop -> Horizontal Virtual Size -> 4

When you start an application, you can assign it to any one of the 4 desktops by right-clicking the upper left corner of the application window and choosing the "To Desktop..." option. Rotating the cube shows the different desktops. You can also go to a desktop using the taskbar icon which shows the 4 desktops.

Emerald

Emerald is the theme engine for Compiz Fusion. Multiple themes are available from KDE Look, some of which are used in KWin as well. Oxygen, a default theme in Kubuntu, is an Emerald theme, for example. (These themes originated from the Beryl project before it merged with Compiz to form Compiz Fusion.) The Emerald Theme Manager for Compiz Fusion can be installed:

sudo apt-get install emerald

Should work for maverick also.