AMD kernel module generator version 2.1 . Active kernel: uname -a = Linux Xignux 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux uname -s = Linux uname -m = x86_64 uname -r = 3.13.0-24-generic uname -v = #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 . Target kernel: uname -a = Linux Xignux 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux uname -s = Linux uname -m = x86_64 uname -r = 3.13.0-24-generic uname -v = #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 . OsVersion says: SMP=1 file /proc/kallsyms says: SMP=1 file /lib/modules/3.13.0-24-generic/build/include/generated/autoconf.h says: SMP=1 file /lib/modules/3.13.0-24-generic/build/include/generated/autoconf.h says: MODVERSIONS=1 file /lib/modules/3.13.0-24-generic/build/arch/x86/include/asm/compat.h says: COMPAT_ALLOC_USER_SPACE=arch_compat_alloc_user_space . doing Makefile based build for kernel 2.6.x and higher make -C /lib/modules/3.13.0-24-generic/build SUBDIRS=/var/lib/dkms/fglrx/13.251/build/2.6.x modules make[1]: Entering directory `/usr/src/linux-headers-3.13.0-24-generic' CC [M] /var/lib/dkms/fglrx/13.251/build/2.6.x/firegl_public.o /var/lib/dkms/fglrx/13.251/build/2.6.x/firegl_public.c: In function ‘KCL_GetEffectiveUid’: /var/lib/dkms/fglrx/13.251/build/2.6.x/firegl_public.c:1758:5: error: incompatible types when returning type ‘kuid_t’ but ‘KCL_TYPE_Uid’ was expected return current_euid(); ^ /var/lib/dkms/fglrx/13.251/build/2.6.x/firegl_public.c:1762:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ make[2]: *** [/var/lib/dkms/fglrx/13.251/build/2.6.x/firegl_public.o] Error 1 make[1]: *** [_module_/var/lib/dkms/fglrx/13.251/build/2.6.x] Error 2 make[1]: Leaving directory `/usr/src/linux-headers-3.13.0-24-generic' make: *** [kmod_build] Error 2 build failed with return value 2