Устанавливая драйвер (для Agere Software ...) под ASPLinux v10, среди прочей информации вижу такое:
;----------------------------------------------
Checking for kernel headers
... in /usr/src/linux: Kernel headers found in /usr/src/linux
... in /usr/src/kernel-headers-2.6.9-1.667asp: nope
... in /usr/src/linux-2.6.9: nope
... in /usr/src/linux-2.6.9-1.667asp: nope
... in /lib/modules/2.6.9-1.667asp/build: Kernel headers found in /lib/modules/2.6.9-1.667asp/build
using /lib/modules/2.6.9-1.667asp/build
Checking kernel header version
Test program for figuring out kernel header version failed

The check for compilation tools and general resources was successful.
Within DOCs/ there is an annotated conf-report.txt
The Makefile and down steam installation scripts have been created.

Next checking for the the needed header file: modversions.h
Properly configuring your sources may be aided by for RPM using Distros
by: utils/srcprep
for RPM using Distros
and for Debian style Distros, the resources of kernel-package.deb
Sorry, assembly of the needed header file: modversions.h
was not specified during configuration of the kernel sources.
Withing the section LOADABLE MODULE SUPPORT:
[*] Set version information on all module symbols
which is necessary to specify the assembly of modeversions.h
Consequently compiling of the drivers will fail at the next step.
;-------------------------------------------------

Из всего этого я решил, что проблемы с файлом modeversions.h. Заглянув в него я увидел:

;-------------------------------------------
#error Modules should never use kernel-headers system headers,
#error but rather headers from the appropriate kernel package.
#error Change -I/usr/src/linux/include (or similar) to
#error -I/lib/modules/$(uname -r)/build/include
#error to build against the currently-running kernel.
;-------------------------------------------
Помогите исправить ошибку. Спасибо. 

Antropoid, 

Вот это у вас явно отключено в конфиге ядра, в разделе 
Loadable Modules Support->Set version information on all module symbols
эта опция, ее включить потом пересобрать, должно помочь.