[PlanetCCRMA] CCRMA rt Kernel and video drivers

[Matt Barber]

Hello,

Unfortunately (some would say fortunately), the livna fglrx drivers no
longer build for the rt kernel.  There are parts of it, like the
preemptible RCU api (I think this is what's causing it), which are
"GPL-only" and won't let the kmod to build (since fglrx is not under
GPL)...  I think things like this have been solved with patches on the
module in the past.  I never have used ATI cards myself, so finding
and applying a patch has never been a priority for me, and so far
nvidia drivers build correctly and work fine.

FYI, here's the failing build message:


FATAL: modpost: GPL-incompatible module fglrx.ko uses GPL-only symbol
'__rcu_read_unlock'



no such thing happens with stock fedora kernels.

Matt


> On Fri, 2007-08-03 at 18:16 +0000, James Hearon wrote:
> > Hi,
> > I'm green at video drivers and kernels.  Trying to get my older Radeon
> > Mobility 7500 ATI to work better for OpenGL.  Using the CCRMA Kenel(s).
> >
> > If I install a video driver whilst using a CCRMA Kernel, ex.
> > # yum install xorg-x11-drv-fglrx kmod-fglrx glx-utils
> >
> > does that mean when the kernel gets updated, which it frequently does, then
> > I need to reinstall the video driver too?  I'm not very clear on how the rt
> > kernel works.
>
> For each kernel you install there must be a "kmod-fglrx" that matches it
> (ie: one kmod-* package per kernel). I don't currently provide binary
> video driver packages so you will need to rebuild the package for the
> Planet CCRMA kernel if you need to use it (you will also need to install
> kernel-rt-devel).
>
> -- Fernando
>