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3

Accidentally rejected nvidia-cudnn license install with apt, now I can't uninstall it

rated 0 times [ 3] [ 0] / answers: 1 / hits: 568 / 3 Years ago, sun, october 17, 2021, 8:22:22

I tried installing nvidia-cudnn and was being a bit fast and lose with the prompts. I accidentally hit reject when trying to install it. Now when I try to uninstall I get the following error:

$ sudo apt purge nvidia-cudnn -y

Reading package lists... Done

Building dependency tree... Done

Reading state information... Done

The following packages will be REMOVED

  nvidia-cudnn*

0 to upgrade, 0 to newly install, 1 to remove and 3 not to upgrade.

After this operation, 45.1 kB disk space will be freed.

(Reading database ... 203730 files and directories currently installed.)

Removing nvidia-cudnn (8.2.4.15~cuda11.4) ...

Purging cuDNN installation from /usr

dpkg: error processing package nvidia-cudnn (--remove):

 installed nvidia-cudnn package pre-removal script subprocess returned error exit status 1

dpkg: too many errors, stopping

Errors were encountered while processing:

 nvidia-cudnn

Processing was halted because there were too many errors.

E: Sub-process /usr/bin/dpkg returned an error code (1)

Manually removing sudo rm -r /usr/share/doc/nvidia-cudnn and sudo rm /var/lib/dpkg/info/nvidia-cudnn* then sudo apt purge nvidia-cudnn doesn't seem to do the trick. When I try and install it again, i'm not prompted for the license anymore. I've tried rebooting in between "uninstalling" and reinstalling. Where is the license accepted/rejected information kept? How can I force it to prompt me with the license again?

Both before and after the messup I used this command to install cudnn sudo apt install nvidia-cudnn

Now all I get is:

$ sudo apt install nvidia-cudnn 

Reading package lists... Done

Building dependency tree... Done

Reading state information... Done

The following NEW packages will be installed

  nvidia-cudnn

0 to upgrade, 1 to newly install, 0 to remove and 0 not to upgrade.

Need to get 13.2 kB of archives.

After this operation, 45.1 kB of additional disk space will be used.

Get:1 http://gb.archive.ubuntu.com/ubuntu jammy/multiverse amd64 nvidia-cudnn amd64 8.2.4.15~cuda11.4 [13.2 kB]

Fetched 13.2 kB in 0s (971 kB/s)        

Preconfiguring packages ...

Selecting previously unselected package nvidia-cudnn.

(Reading database ... 203718 files and directories currently installed.)

Preparing to unpack .../nvidia-cudnn_8.2.4.15~cuda11.4_amd64.deb ...

Unpacking nvidia-cudnn (8.2.4.15~cuda11.4) ...

Setting up nvidia-cudnn (8.2.4.15~cuda11.4) ...

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luringdge

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answered 3 Years ago hreadsoplet · Accepted Answer

The uninstall process fails as the pre-removal script (/var/lib/dpkg/info/nvidia-cudnn.prerm) returns non-zero exit status.
Inside, the pre-removal script calls
update-nvidia-cudnn -p located in /usr/sbin/update-nvidia-cudnn
which after line 164 (echo Purging cuDNN installation from ${PREFIX}) runs a command purge_cudnn ${PREFIX} that fails.

I was able to fix the issue by forcing exit 0 from update-nvidia-cudnn -p, by adding exit 0 after line 164 in file /usr/sbin/update-nvidia-cudnn.

To sum up, edit the end of file /usr/sbin/update-nvidia-cudnn to:

...

elif test "${DO_PURGE}" -ne 0; then

    echo Purging cuDNN installation from ${PREFIX}

    exit 0  # added

    purge_cudnn ${PREFIX}

fi

and the uninstall process becomes possible. Then if nvidia-cudnn is installed again, the installer will ask you again to agree to the license.