[elrepo] fglrx error - kernel module version does *not* match driver

[Stephen Isard]

Hello,

I have SL 6.7, on a Dell Optiplex 980 with a Radeon 6450 card installed.
The elrepo fglrx driver has been working through successive updates of 
SL and kernel for a couple of years.  Yesterday I upgraded the kernel to
2.6.32-573.12.1.el6.x86_64 and took the occasion to upgrade 
fglrx-x11-drv.x86_64 and kmod-fglrx.x86_64 to 15.12-1.el6.elrepo.
X then failed to start, so I downgraded to 15.11-1.el6.elrepo, but that 
didn't help.

The current state of play is
$ yum list installed "*fglrx*"
Installed Packages
fglrx-x11-drv.x86_64   15.11-1.el6.elrepo    @elrepo
kmod-fglrx.x86_64      15.11-1.el6.elrepo    @elrepo

xorg.conf hasn't changed.  I've compared against backups.

What look like relevant lines in Xorg.0.log (same for 15-11 and 
15-12) are:
[  2678.506] (--) fglrx(0): Chipset: "AMD Radeon HD 6450" (Chipset = 
0x6779)
[  2678.584] (WW) fglrx(0): board is an unknown third party board, 
chipset is supported
[  2679.117] (II) fglrx(0): Adapter AMD Radeon HD 6450 has 4 
configurable heads and 2 displays connected.
[  2679.122] (II) fglrx(1): Adapter AMD Radeon HD 6450 has 4 
configurable heads and 2 displays connected.

[ 72531.964] (II) fglrx(0): Kernel Module Version Information:
[ 72531.964] (II) fglrx(0):     Name: fglrx
[ 72531.964] (II) fglrx(0):     Version: 15.20.3
[ 72531.964] (II) fglrx(0):     Date: Sep  8 2015
[ 72531.964] (II) fglrx(0):     Desc: AMD FireGL DRM kernel module
[ 72531.964] (WW) fglrx(0): Kernel Module version does *not* match 
driver.

And then it segfaults.

I am puzzled by that 15.20.3 given the version of kmod-fglrx, but I have 
tried reinstalling and it stays the same.

$ rpm -ql kmod-fglrx
/etc/depmod.d/kmod-fglrx.conf
/lib/modules/2.6.32-573.el6.x86_64
/lib/modules/2.6.32-573.el6.x86_64/extra
/lib/modules/2.6.32-573.el6.x86_64/extra/fglrx
/lib/modules/2.6.32-573.el6.x86_64/extra/fglrx/fglrx.ko
/usr/share/doc/kmod-fglrx-15.11
/usr/share/doc/kmod-fglrx-15.11/LICENSE.TXT

$ls -l /lib/modules/2.6.32-573.el6.x86_64/extra/fglrx/fglrx.ko
-rw-r--r--. 1 root root 18350784 Dec 18 06:25
 	/lib/modules/2.6.32-573.el6.x86_64/extra/fglrx/fglrx.ko

Any ideas?

Stephen Isard