Hi all, i found a fix here: https://launchpadlibrarian.net/712960879/nvidia-graphics-drivers-470_470.223.02-0ubuntu2.debdiff
Simply you need to edit the file /var/lib/dkms/nvidia-legacy-390xx/390.157/source/nvidia-drm/nvidia-drm-drv.c and apply this patch: +--- a/nvidia-drm/nvidia-drm-drv.c ++++ b/nvidia-drm/nvidia-drm-drv.c +@@ -745,29 +745,29 @@ static const struct drm_ioctl_desc nv_drm_ioctls[] = { + #if defined(NV_DRM_ATOMIC_MODESET_AVAILABLE) + DRM_IOCTL_DEF_DRV(NVIDIA_GEM_IMPORT_NVKMS_MEMORY, + nv_drm_gem_import_nvkms_memory_ioctl, +- DRM_RENDER_ALLOW|DRM_UNLOCKED), ++ DRM_RENDER_ALLOW), + #endif /* NV_DRM_ATOMIC_MODESET_AVAILABLE */ + + DRM_IOCTL_DEF_DRV(NVIDIA_GEM_IMPORT_USERSPACE_MEMORY, + nv_drm_gem_import_userspace_memory_ioctl, +- DRM_RENDER_ALLOW|DRM_UNLOCKED), ++ DRM_RENDER_ALLOW), + DRM_IOCTL_DEF_DRV(NVIDIA_GEM_MAP_OFFSET, + nv_drm_gem_map_offset_ioctl, +- DRM_RENDER_ALLOW|DRM_UNLOCKED), ++ DRM_RENDER_ALLOW), + DRM_IOCTL_DEF_DRV(NVIDIA_GET_DEV_INFO, + nv_drm_get_dev_info_ioctl, +- DRM_RENDER_ALLOW|DRM_UNLOCKED), ++ DRM_RENDER_ALLOW), + + #if defined(NV_DRM_FENCE_AVAILABLE) + DRM_IOCTL_DEF_DRV(NVIDIA_FENCE_SUPPORTED, + nv_drm_fence_supported_ioctl, +- DRM_RENDER_ALLOW|DRM_UNLOCKED), ++ DRM_RENDER_ALLOW), + DRM_IOCTL_DEF_DRV(NVIDIA_FENCE_CONTEXT_CREATE, + nv_drm_fence_context_create_ioctl, +- DRM_RENDER_ALLOW|DRM_UNLOCKED), ++ DRM_RENDER_ALLOW), + DRM_IOCTL_DEF_DRV(NVIDIA_GEM_FENCE_ATTACH, + nv_drm_gem_fence_attach_ioctl, +- DRM_RENDER_ALLOW|DRM_UNLOCKED), ++ DRM_RENDER_ALLOW), + #endif + + DRM_IOCTL_DEF_DRV(NVIDIA_GET_CLIENT_CAPABILITY, +@@ -776,19 +776,19 @@ static const struct drm_ioctl_desc nv_drm_ioctls[] = { + #if defined(NV_DRM_ATOMIC_MODESET_AVAILABLE) + DRM_IOCTL_DEF_DRV(NVIDIA_GET_CRTC_CRC32, + nv_drm_get_crtc_crc32_ioctl, +- DRM_RENDER_ALLOW|DRM_UNLOCKED), ++ DRM_RENDER_ALLOW), + DRM_IOCTL_DEF_DRV(NVIDIA_GET_CRTC_CRC32_V2, + nv_drm_get_crtc_crc32_v2_ioctl, +- DRM_RENDER_ALLOW|DRM_UNLOCKED), ++ DRM_RENDER_ALLOW), + DRM_IOCTL_DEF_DRV(NVIDIA_GEM_EXPORT_NVKMS_MEMORY, + nv_drm_gem_export_nvkms_memory_ioctl, +- DRM_RENDER_ALLOW|DRM_UNLOCKED), ++ DRM_RENDER_ALLOW), + DRM_IOCTL_DEF_DRV(NVIDIA_GEM_ALLOC_NVKMS_MEMORY, + nv_drm_gem_alloc_nvkms_memory_ioctl, +- DRM_RENDER_ALLOW|DRM_UNLOCKED), ++ DRM_RENDER_ALLOW), + DRM_IOCTL_DEF_DRV(NVIDIA_GEM_EXPORT_DMABUF_MEMORY, + nv_drm_gem_export_dmabuf_memory_ioctl, +- DRM_RENDER_ALLOW|DRM_UNLOCKED), ++ DRM_RENDER_ALLOW), + #endif /* NV_DRM_ATOMIC_MODESET_AVAILABLE */ + }; Replace all DRM_RENDER_ALLOW|DRM_UNLOCKED with DRM_RENDER_ALLOW (delete DRM_UNLOCKED) . Now it will compile successfully all nvidia modules. Regards Attila