Comment 31 for bug 1057675

Attached the output of installing v3.6-rc7-quantal mainline to precise
Note the lines:
Error! Bad return status for module build on kernel: 3.6.0-030600rc7-generic (x86_64)
Consult /var/lib/dkms/nvidia-current/295.40/build/make.log for more information.

make.log:

DKMS make.log for nvidia-current-295.40 for kernel 3.6.0-030600rc7-generic (x86_64)
sáb sep 29 08:34:54 VET 2012
NVIDIA: calling KBUILD...
test -e include/generated/autoconf.h -a -e include/config/auto.conf || ( \
 echo >&2; \
 echo >&2 " ERROR: Kernel configuration is invalid."; \
 echo >&2 " include/generated/autoconf.h or include/config/auto.conf are missing.";\
 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
 echo >&2 ; \
 /bin/false)
mkdir -p /var/lib/dkms/nvidia-current/295.40/build/.tmp_versions ; rm -f /var/lib/dkms/nvidia-current/295.40/build/.tmp_versions/*
make -f scripts/Makefile.build obj=/var/lib/dkms/nvidia-current/295.40/build
  cc -Wp,-MD,/var/lib/dkms/nvidia-current/295.40/build/.nv.o.d -nostdinc -isystem /usr/lib/gcc/x86_64-linux-gnu/4.6/include -I/usr/src/linux-headers-3.6.0-030600rc7-generic/arch/x86/include -Iarch/x86/include/generated -Iinclude -include /usr/src/linux-headers-3.6.0-030600rc7-generic/include/linux/kconfig.h -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -fno-delete-null-pointer-checks -O2 -m64 -mtune=generic -mno-red-zone -mcmodel=kernel -funit-at-a-time -maccumulate-outgoing-args -fstack-protector -DCONFIG_X86_X32_ABI -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_FXSAVEQ=1 -DCONFIG_AS_AVX=1 -pipe -Wno-sign-compare -fno-asynchronous-unwind-tables -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -Wframe-larger-than=1024 -Wno-unused-but-set-variable -fno-omit-frame-pointer -fno-optimize-sibling-calls -pg -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fconserve-stack -DCC_HAVE_ASM_GOTO -I/var/lib/dkms/nvidia-current/295.40/build -Wall -MD -Wsign-compare -Wno-cast-qual -Wno-error -D__KERNEL__ -DMODULE -DNVRM -DNV_VERSION_STRING=\"295.40\" -Wno-unused-function -Wuninitialized -mno-red-zone -mcmodel=kernel -UDEBUG -U_DEBUG -DNDEBUG -DMODULE -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(nv)" -D"KBUILD_MODNAME=KBUILD_STR(nvidia)" -c -o /var/lib/dkms/nvidia-current/295.40/build/.tmp_nv.o /var/lib/dkms/nvidia-current/295.40/build/nv.c
In file included from include/linux/kernel.h:19:0,
                 from include/linux/sched.h:55,
                 from include/linux/utsname.h:35,
                 from /var/lib/dkms/nvidia-current/295.40/build/nv-linux.h:38,
                 from /var/lib/dkms/nvidia-current/295.40/build/nv.c:13:
include/linux/bitops.h: In function 'hweight_long':
include/linux/bitops.h:66:41: warning: signed and unsigned type in conditional expression [-Wsign-compare]
In file included from /usr/src/linux-headers-3.6.0-030600rc7-generic/arch/x86/include/asm/uaccess.h:586:0,
                 from include/linux/poll.h:14,
                 from /var/lib/dkms/nvidia-current/295.40/build/nv-linux.h:97,
                 from /var/lib/dkms/nvidia-current/295.40/build/nv.c:13:
/usr/src/linux-headers-3.6.0-030600rc7-generic/arch/x86/include/asm/uaccess_64.h: In function 'copy_from_user':
/usr/src/linux-headers-3.6.0-030600rc7-generic/arch/x86/include/asm/uaccess_64.h:62:6: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
In file included from /var/lib/dkms/nvidia-current/295.40/build/nv.c:13:0:
/var/lib/dkms/nvidia-current/295.40/build/nv-linux.h: At top level:
/var/lib/dkms/nvidia-current/295.40/build/nv-linux.h:114:75: fatal error: asm/system.h: No such file or directory
compilation terminated.
make[3]: *** [/var/lib/dkms/nvidia-current/295.40/build/nv.o] Error 1
make[2]: *** [_module_/var/lib/dkms/nvidia-current/295.40/build] Error 2
NVIDIA: left KBUILD.
nvidia.ko failed to build!
make[1]: *** [module] Error 1
make: *** [module] Error 2

Its the same with the other kernels, nvidia.ko fails to build. Reboot results in degraded graphics (nouveau takes over).