ian@pc:~$ dpkg -l nvidia-driver
dpkg-query: no packages found matching nvidia-driver

:)

If I look for anything starting with that, it's

ian@pc:~$ dpkg -l nvidia-driver*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                 Version                     Architecture Description
+++-====================-===========================-============-=============>
ii  nvidia-driver-470    470.103.01-0ubuntu0.21.10.1 amd64        NVIDIA driver>
un  nvidia-driver-binary <none>                      <none>       (no descripti>


Looking for everything nvidia...

ian@pc:~$ dpkg -l nvidia*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                      Version                     Architecture Description
+++-=========================-===========================-============-===============================================
un  nvidia-384                <none>                      <none>       (no description available)
un  nvidia-390                <none>                      <none>       (no description available)
un  nvidia-common             <none>                      <none>       (no description available)
un  nvidia-compute-utils      <none>                      <none>       (no description available)
rc  nvidia-compute-utils-390  390.116-0ubuntu1            amd64        NVIDIA compute utilities
rc  nvidia-compute-utils-430  430.50-0ubuntu2             amd64        NVIDIA compute utilities
rc  nvidia-compute-utils-435  435.21-0ubuntu7             amd64        NVIDIA compute utilities
rc  nvidia-compute-utils-450  450.102.04-0ubuntu0.20.10.2 amd64        NVIDIA compute utilities
ii  nvidia-compute-utils-470  470.103.01-0ubuntu0.21.10.1 amd64        NVIDIA compute utilities
rc  nvidia-compute-utils-495  495.46-0ubuntu0.21.10.1     amd64        NVIDIA compute utilities
rc  nvidia-compute-utils-510  510.47.03-0ubuntu0.21.10.1  amd64        NVIDIA compute utilities
rc  nvidia-dkms-390           390.116-0ubuntu1            amd64        NVIDIA DKMS package
rc  nvidia-dkms-430           430.50-0ubuntu2             amd64        NVIDIA DKMS package
rc  nvidia-dkms-435           435.21-0ubuntu7             amd64        NVIDIA DKMS package
rc  nvidia-dkms-450           450.102.04-0ubuntu0.20.10.2 amd64        NVIDIA DKMS package
ii  nvidia-dkms-470           470.103.01-0ubuntu0.21.10.1 amd64        NVIDIA DKMS package
rc  nvidia-dkms-495           495.46-0ubuntu0.21.10.1     amd64        NVIDIA DKMS package
rc  nvidia-dkms-510           510.47.03-0ubuntu0.21.10.1  amd64        NVIDIA DKMS package
un  nvidia-dkms-kernel        <none>                      <none>       (no description available)
ii  nvidia-driver-470         470.103.01-0ubuntu0.21.10.1 amd64        NVIDIA driver metapackage
un  nvidia-driver-binary      <none>                      <none>       (no description available)
un  nvidia-egl-wayland-common <none>                      <none>       (no description available)
un  nvidia-kernel-common      <none>                      <none>       (no description available)
rc  nvidia-kernel-common-390  390.116-0ubuntu1            amd64        Shared files used with the kernel module
rc  nvidia-kernel-common-430  430.50-0ubuntu2             amd64        Shared files used with the kernel module
rc  nvidia-kernel-common-435  435.21-0ubuntu7             amd64        Shared files used with the kernel module
rc  nvidia-kernel-common-450  450.102.04-0ubuntu0.20.10.2 amd64        Shared files used with the kernel module
ii  nvidia-kernel-common-470  470.103.01-0ubuntu0.21.10.1 amd64        Shared files used with the kernel module
rc  nvidia-kernel-common-495  495.46-0ubuntu0.21.10.1     amd64        Shared files used with the kernel module
rc  nvidia-kernel-common-510  510.47.03-0ubuntu0.21.10.1  amd64        Shared files used with the kernel module
un  nvidia-kernel-source      <none>                      <none>       (no description available)
un  nvidia-kernel-source-390  <none>                      <none>       (no description available)
un  nvidia-kernel-source-430  <none>                      <none>       (no description available)
un  nvidia-kernel-source-435  <none>                      <none>       (no description available)
un  nvidia-kernel-source-450  <none>                      <none>       (no description available)
ii  nvidia-kernel-source-470  470.103.01-0ubuntu0.21.10.1 amd64        NVIDIA kernel source package
un  nvidia-kernel-source-495  <none>                      <none>       (no description available)
un  nvidia-kernel-source-510  <none>                      <none>       (no description available)
un  nvidia-libopencl1-dev     <none>                      <none>       (no description available)
un  nvidia-opencl-icd         <none>                      <none>       (no description available)
un  nvidia-persistenced       <none>                      <none>       (no description available)
ii  nvidia-prime              0.8.17.1                    all          Tools to enable NVIDIA's Prime
ii  nvidia-settings           470.57.01-0ubuntu3          amd64        Tool for configuring the NVIDIA graphics driver
un  nvidia-settings-binary    <none>                      <none>       (no description available)
un  nvidia-smi                <none>                      <none>       (no description available)
un  nvidia-utils              <none>                      <none>       (no description available)
ii  nvidia-utils-470          470.103.01-0ubuntu0.21.10.1 amd64        NVIDIA driver support binaries

(Obviously, I'm using the 470 drivers at the moment, because THEY WORK. I'll install the 510 ones via 'Software & Updates', reboot, see what happens, undo that, and come back. Is it worth saying again that the same thing happened with the 495 ones last month?)