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The newer version of the DKMS Nvidia driver won’t install on Ubuntu 22.04.

From logs :

cat /var/lib/dkms/nvidia/520.56.06/build/make.log
....
  cc -Wp,-MMD,/var/lib/dkms/nvidia/520.56.06/build/nvidia/.nv-mmap.o.d -nostdinc -I./arch/x86/include -I./arch/x86/include/generated  -I./include -I./arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/compiler-version.h -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Wno-format-security -std=gnu11 -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -fcf-protection=none -m64 -falign-jumps=1 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup -mtune=generic -mno-red-zone -mcmodel=kernel -Wno-sign-compare -fno-asynchronous-unwind-tables -mindirect-branch=thunk-extern -mindirect-branch-register -mindirect-branch-cs-prefix -mfunction-return=thunk-extern -fno-jump-tables -mharden-sls=all -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-address-of-packed-member -O2 -fno-allow-store-data-races -Wframe-larger-than=1024 -fstack-protector-strong -Wno-array-bounds -Wimplicit-fallthrough=5 -Wno-main -Wno-unused-but-set-variable -Wno-unused-const-variable -fno-omit-frame-pointer -fno-optimize-sibling-calls -ftrivial-auto-var-init=zero -fzero-call-used-regs=used-gpr -pg -mrecord-mcount -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-maybe-uninitialized -Wno-alloc-size-larger-than -fno-strict-overflow -fno-stack-check -fconserve-stack -Werror=date-time -g -gdwarf-5 -I/var/lib/dkms/nvidia/520.56.06/build/common/inc -I/var/lib/dkms/nvidia/520.56.06/build -Wall -MD -Wno-cast-qual -Wno-error -Wno-format-extra-args -D__KERNEL__ -DMODULE -DNVRM -DNV_VERSION_STRING=\"520.56.06\" -Wno-unused-function -Wuninitialized -fno-strict-aliasing -ffreestanding -mno-red-zone -mcmodel=kernel -DNV_UVM_ENABLE -DNV_SPECTRE_V2=0 -DNV_KERNEL_INTERFACE_LAYER -I/var/lib/dkms/nvidia/520.56.06/build/nvidia -DNVIDIA_UNDEF_LEGACY_BIT_MACROS -UDEBUG -U_DEBUG -DNDEBUG  -fsanitize=bounds -fsanitize=shift -fsanitize=bool -fsanitize=enum  -DMODULE  -DKBUILD_BASENAME='"nv_mmap"' -DKBUILD_MODNAME='"nvidia"' -D__KBUILD_MODNAME=kmod_nvidia -c -o /var/lib/dkms/nvidia/520.56.06/build/nvidia/nv-mmap.o /var/lib/dkms/nvidia/520.56.06/build/nvidia/nv-mmap.c   ; ./tools/objtool/objtool  --hacks=jump_label  --hacks=noinstr     --retpoline  --rethunk  --sls  --stackval  --static-call  --uaccess   --module  /var/lib/dkms/nvidia/520.56.06/build/nvidia/nv-mmap.o
cc: error: unrecognized command-line option ‘-ftrivial-auto-var-init=zero’
cc: error: unrecognized command-line option ‘-ftrivial-auto-var-init=zero’
make[2]: *** [scripts/Makefile.build:249: /var/lib/dkms/nvidia/520.56.06/build/nvidia/nv-pci.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: *** [scripts/Makefile.build:249: /var/lib/dkms/nvidia/520.56.06/build/nvidia/nv.o] Error 1
cc: error: unrecognized command-line option ‘-ftrivial-auto-var-init=zero’
make[2]: *** [scripts/Makefile.build:249: /var/lib/dkms/nvidia/520.56.06/build/nvidia/nv-dmabuf.o] Error 1
cc: error: unrecognized command-line option ‘-ftrivial-auto-var-init=zero’
make[2]: *** [scripts/Makefile.build:249: /var/lib/dkms/nvidia/520.56.06/build/nvidia/nv-acpi.o] Error 1
cc: error: unrecognized command-line option ‘-ftrivial-auto-var-init=zero’
make[2]: *** [scripts/Makefile.build:249: /var/lib/dkms/nvidia/520.56.06/build/nvidia/nv-cray.o] Error 1
cc: error: unrecognized command-line option ‘-ftrivial-auto-var-init=zero’
make[2]: *** [scripts/Makefile.build:249: /var/lib/dkms/nvidia/520.56.06/build/nvidia/nv-i2c.o] Error 1
cc: error: unrecognized command-line option ‘-ftrivial-auto-var-init=zero’
make[2]: *** [scripts/Makefile.build:249: /var/lib/dkms/nvidia/520.56.06/build/nvidia/nv-dma.o] Error 1
cc: error: unrecognized command-line option ‘-ftrivial-auto-var-init=zero’
make[2]: *** [scripts/Makefile.build:249: /var/lib/dkms/nvidia/520.56.06/build/nvidia/nv-mmap.o] Error 1
make[1]: *** [Makefile:1858: /var/lib/dkms/nvidia/520.56.06/build] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-6.0.0-060000-generic'
make: *** [Makefile:82: modules] Error 2

Error “unrecognized command-line option ‘-ftrivial-auto-var-init=zero’ looks like we need a newer version of GCC. Firstly try to install deps

sudo apt install build-essential

Then install GCC 12

sudo apt install gcc-12

Check versions

$ gcc --version
gcc (Ubuntu 11.3.0-1ubuntu1~22.04) 11.3.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ gcc-12 --version
gcc-12 (Ubuntu 12.1.0-2ubuntu1~22.04) 12.1.0
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Switch default version GCC system-wide

$ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 100 --slave /usr/bin/g++ g++ /usr/bin/g++-12 --slave /usr/bin/gcov gcov /usr/bin/gcov-12
$ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-11 90 --slave /usr/bin/g++ g++ /usr/bin/g++-11 --slave /usr/bin/gcov gcov /usr/bin/gcov-11
$ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 80 --slave /usr/bin/g++ g++ /usr/bin/g++-9 --slave /usr/bin/gcov gcov /usr/bin/gcov-9
$ sudo update-alternatives --config gcc
There are 3 choices for the alternative gcc (providing /usr/bin/gcc).

  Selection    Path             Priority   Status
------------------------------------------------------------
* 0            /usr/bin/gcc-12   100       manual mode
  1            /usr/bin/gcc-11   90        manual mode
  2            /usr/bin/gcc-9    80        manual mode

Check

$ gcc --version
gcc (Ubuntu 12.1.0-2ubuntu1~22.04) 12.1.0
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.