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Old 10-22-2013, 10:39 AM   #1
kikinovak
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Some KDE desktop effects suddenly stopped working


Hi,

I've been running KDE 4.10.5 on Slackware64 14.0 for the last two or three months. Everything's been running perfectly. I have the standard set of KDE desktop effects enabled, and the only extravagance is wobbly windows.

Today, all of a sudden, Windows aren't wobbly anymore. There seems to be no way to re-enable the effect. KDE settings keep complaining that "7 desktop effects can't be enabled".

Here's my video card:

Code:
[kikinovak@alphamule:~] $ /sbin/lspci | grep -i vga
01:00.0 VGA compatible controller: nVidia Corporation GF119 [GeForce GT 520] (rev a1)
I'm using the latest Nvidia proprietary driver on it, and nouveau is blacklisted.

What's puzzling here: the effect has been working for the last two months and then suddenly stopped. I'm intrigued.

Any idea what's going on here?
 
Old 10-22-2013, 10:48 AM   #2
allend
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Check the [Compositing] section in ~/.kde/share/config/kwinrc
Code:
OpenGLIsUnsafe=false
KDE has a habit of setting this to true and doing no further checks.
 
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Old 10-22-2013, 10:55 AM   #3
kikinovak
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I checked, it is "false". So that doesn't seem to be the problem. Also, some of the effects still work, like transparency or animated maximizing/minimizing of a window. I'm puzzled.
 
Old 10-22-2013, 11:09 AM   #4
allend
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Some KDE desktop effects depend on having appropriate OpenGL support (Wobbly windows and Blur spring to mind).
Does 'glxinfo | grep OpenGL' show Nvidia in the vendor string?
Is 'Backend=OpenGL' shown in the Compositing section of kwinrc?

This is an old post, but has some background. http://www.linuxquestions.org/questi...ent-has-broken
and another showing my kwinrc [Compositing] section. http://www.linuxquestions.org/questi...7/#post4362492

Last edited by allend; 10-22-2013 at 11:14 AM. Reason: extra link added
 
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Old 10-22-2013, 11:22 AM   #5
kikinovak
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Got it! I had 'Backend=XRender'. I set it back to OpenGL, and now all my desktop effects are fully available again.

I think I know what happened. Yesterday I updated some packages on this machine, and there were some xorg-* packages in the set of patches. I started KDE, and then mysteriously VirtualBox crashed on startup. I thought this was a video driver related thing, and some components of my proprietary NVidia driver must have been squashed by the upgrade process. Switched to init 3, reinstalled the thing, and everything went, well, almost well. I guess KDE must have detected in the process that something's missing and must have reset the 'Backend' value.

Anyway, problem solved. Thanks very much!
 
Old 11-02-2013, 02:51 PM   #6
Abhid
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Unhappy Same problem

Changing Backend=XRender to Backend=OpenGL did not solve the problem for me.

Output of glxinfo | grep OpenGL

Quote:
OpenGL vendor string: Mesa Project
OpenGL renderer string: Software Rasterizer
OpenGL version string: 2.1 Mesa 7.7.1
OpenGL shading language version string: 1.20
OpenGL extensions:
System Info:

Quote:
OS: Debian Squeeze

KDE version: 4.4.5

GPU : SiS 661/741/760 PCI AGP or 662/761Gx PCIE VGA Adapter

RAM: 1.2 GB

CPU : Intel Core 2 Duo 3 Ghz
 
Old 11-02-2013, 03:09 PM   #7
kikinovak
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Quote:
Originally Posted by Abhid View Post
Changing Backend=XRender to Backend=OpenGL did not solve the problem for me.
My configuration also has Distro=Slackware.
 
Old 11-02-2013, 03:09 PM   #8
jtsn
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You clearly don't have the same problem as the OP. You have no functioning OpenGL support, a 3 years old Mesa version, a different very old GPU, a different distribution and a different KDE version. So maybe you should open another thread?
 
  


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