This appears to be the issue. DRM_UNLOCKED does not exist for nvidia-
drm-drv.c to compile. Missing ot changed kernel header?

# CC [M]  
/var/lib/dkms/nvidia/545.29.06/build/nvidia-drm/nvidia-drm-gem-nvkms-memory.o
  cc 
-Wp,-MMD,/var/lib/dkms/nvidia/545.29.06/build/nvidia-drm/.nvidia-drm-gem-nvkms-memory.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 -I./ubuntu/include -include 
./include/linux/compiler_types.h -D__KERNEL__ -fmacro-prefix-map=./= -std=gnu11 
-fshort-wchar -funsigned-char -fno-common -fno-PIE -fno-strict-aliasing 
-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 -fpatchable-function-entry=16,16 
-fno-delete-null-pointer-checks -O2 -fno-allow-store-data-races 
-fstack-protector-strong -fno-omit-frame-pointer -fno-optimize-sibling-calls 
-ftrivial-auto-var-init=zero -fno-stack-clash-protection 
-fzero-call-used-regs=used-gpr -pg -mrecord-mcount -mfentry -DCC_USING_FENTRY 
-falign-functions=16 -fstrict-flex-arrays=3 -fno-strict-overflow 
-fno-stack-check -fconserve-stack -Wall -Wundef 
-Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type 
-Werror=strict-prototypes -Wno-format-security -Wno-trigraphs 
-Wno-frame-address -Wno-address-of-packed-member -Wmissing-declarations 
-Wmissing-prototypes -Wframe-larger-than=1024 -Wno-main 
-Wno-unused-but-set-variable -Wno-unused-const-variable -Wno-dangling-pointer 
-Wvla -Wno-pointer-sign -Wcast-function-type -Wno-stringop-overflow 
-Wno-array-bounds -Wno-alloc-size-larger-than -Wimplicit-fallthrough=5 
-Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init 
-Wenum-conversion -Wno-unused-but-set-variable -Wno-unused-const-variable 
-Wno-restrict -Wno-packed-not-aligned -Wno-format-overflow 
-Wno-format-truncation -Wno-stringop-truncation -Wno-missing-field-initializers 
-Wno-type-limits -Wno-shift-negative-value -Wno-maybe-uninitialized 
-Wno-sign-compare -g -gdwarf-5 
-I/var/lib/dkms/nvidia/545.29.06/build/common/inc 
-I/var/lib/dkms/nvidia/545.29.06/build -Wall -Wno-cast-qual -Wno-error 
-Wno-format-extra-args -D__KERNEL__ -DMODULE -DNVRM 
-DNV_VERSION_STRING=\"545.29.06\" -DNV_FILESYSTEM_ACCESS_AVAILABLE=1 
-Wno-unused-function -Wuninitialized -fno-strict-aliasing -ffreestanding 
-mno-red-zone -mcmodel=kernel -DNV_UVM_ENABLE -Werror=undef -DNV_SPECTRE_V2=0 
-DNV_KERNEL_INTERFACE_LAYER -I/var/lib/dkms/nvidia/545.29.06/build/nvidia-drm 
-UDEBUG -U_DEBUG -DNDEBUG -DNV_BUILD_MODULE_INSTANCES=0  
-fsanitize=bounds-strict -fsanitize=shift -fsanitize=bool -fsanitize=enum  
-DMODULE  -DKBUILD_BASENAME='"nvidia_drm_gem_nvkms_memory"' 
-DKBUILD_MODNAME='"nvidia_drm"' -D__KBUILD_MODNAME=kmod_nvidia_drm -c -o 
/var/lib/dkms/nvidia/545.29.06/build/nvidia-drm/nvidia-drm-gem-nvkms-memory.o 
/var/lib/dkms/nvidia/545.29.06/build/nvidia-drm/nvidia-drm-gem-nvkms-memory.c   
; ./tools/objtool/objtool --hacks=jump_label --hacks=noinstr --hacks=skylake 
--retpoline --rethunk --sls --stackval --static-call --uaccess --prefix=16   
--module 
/var/lib/dkms/nvidia/545.29.06/build/nvidia-drm/nvidia-drm-gem-nvkms-memory.o
In file included from 
/var/lib/dkms/nvidia/545.29.06/build/nvidia-drm/nvidia-drm-drv.c:64:
/var/lib/dkms/nvidia/545.29.06/build/nvidia-drm/nvidia-drm-drv.c:1489:40: 
error: ‘DRM_UNLOCKED’ undeclared here (not in a function); did you mean 
‘VM_LOCKED’?
 1489 |                       DRM_RENDER_ALLOW|DRM_UNLOCKED),
      |                                        ^~~~~~~~~~~~
./include/drm/drm_ioctl.h:155:26: note: in definition of macro 
‘DRM_IOCTL_DEF_DRV’
  155 |                 .flags = _flags,                                        
\
      |                          ^~~~~~

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https://bugs.launchpad.net/bugs/2063503

Title:
  NVidia drivers won't install completely

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https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/2063503/+subscriptions


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