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====== Problems @ Matfys ======

In this page I am trying to collect all the issues that I solved from time to time, so that I remember how to fix those if needed.

===== Very slow graphical interface on workstation ======

==== Disable Desktop Effects in KDE ====

- Click on the KDE icon and search for ''Desktop Effects''
- Disable effects as in this picture:
{{http://mschlander.files.wordpress.com/2011/01/effects.png?w=720}}

The above picture belongs to this blog you might want to have a read:
http://mschlander.wordpress.com/2011/01/23/kde-is-slow-for-dummies/

==== NVIDIA video card issues ====

In systems running nvidia graphical cards, sometimes the video driver gets messed up with cached info.
To fix this, run the following as normal user while logged in e.g. KDE:
<code bash>
nvidia-settings -a PixmapCache=0
</code>

Affected systems so far:
<code bash>
root@jarjar 11.4 ~> lspci | grep VGA
01:00.0 VGA compatible controller: nVidia Corporation G98 [GeForce 8400 GS] (rev a1)
</code>

===== System becomes unresponsive and crashes =====

==== Akonadi+nepomuk eating all CPU power and memory ====

You can spot this if you login to a terminal and run ''top''. You'll see processes that contain ''akonadi'' in the name taking over 100% of all cores and memory.

To solve this problem,
- Login on terminal or ssh to any machine with your user.
- cd into your home folder, and run the following:<code bash>
   rm -rf .local/share/akonadi
   rm -rf .config/akonadi
   rm .kde4/share/config/akonadi*
</code>
- logout and try to login graphically. Akonadi should not freak out
anymore.

==== nfs4 mount problems ====

Due to incompatibility trough versions on nfs4, if in the logs such an error appears:
<code io>
Jun 12 13:57:55 balder automount[3145]: umount_autofs_indirect: ask umount returned busy /nfs
</code>

then it seemed more stable to switch to nfs3. This is done in '/etc/nfsmount.conf'. Please ask the administrator for such a fix.
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