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Old 07-28-2010, 01:55 PM   #1
Registered: Dec 2009
Distribution: Slackware
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No 3D in KDE with Catalyst 10.6 (Slackware 13.1 32-bit)

I've been having issues with 3D using the ATI catalyst driver since I started using Slackware (since version 12.2). I've had a few different graphics problems and through trial and error I've discovered they all start with install the proprietary ATI driver. I installed the Gnome Slackbuild to try it out, and managed to get 3D (ie. compiz) working flawlessly there, but for some reason I cannot get KDE visual effects to do anything while using this driver (although they work fine with the open source radeonhd driver). Any thoughts as to why KDE and the ATI driver are being un-cooperative with each other?

Secondly, I created a initrd and changed to use the generic kernel instead of the huge kernel. It doesn't appear the the ATI driver loads properly with the generic kernel as the 3D doesn't work at all and the output of fglrx gives lots of weird error messages about how the driver hasn't loaded properly (or at all)? So where would I go to make sure the fglrx module is loaded by the kernel?
Old 07-28-2010, 02:26 PM   #2
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Yeah, KDE4 has issues with fglrx, not always realizing that fglrx is capable of using desktop effects. You can probably force KDE4 to start with desktop effects enabled by modifying your users ~/.kde/share/config/kwinrc file and setting the appropriate options in the [Compositing] section. Something like this:

As for your other question.. Did you compile the fglrx kernel module against the generic kernel or the huge kernel?

Old 07-28-2010, 03:14 PM   #3
Registered: Dec 2009
Distribution: Slackware
Posts: 229

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I will try the KDE fix tonight. I guess I did compile the fglrx module against the wrong kernel now that I think about it, I'll remove it tonight and try again with the generic kernel.
Old 07-29-2010, 03:05 AM   #4
Registered: Aug 2009
Location: Netherlands
Distribution: Slackware64-current
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If you try to compile the 10.6 fglrx module against a custom kernel the module doesn't build. The line: "#include <linux/slab.h>" is missing in "ati-driver/common/lib/modules/fglrx/build_mod/kcl_wait.c" (unpack the driver).

You can either add the line before compiling, or use the new 10.7 Catalyst, which doesn't have this problem.
Old 07-29-2010, 08:15 AM   #5
Registered: Dec 2009
Distribution: Slackware
Posts: 229

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You totally answered my question before I asked it... amazing! I just downloaded 10.7, was gonna try it out anyways, but it's good to know.

KDE fix definitely worked. Thanks.
Old 08-03-2010, 11:15 AM   #6
Registered: Dec 2009
Distribution: Slackware
Posts: 229

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New ATI driver works. Thanks people.


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