As /usr/lib/libGL.so is just a symlink, I noted down the destination and then removed /usr/lib/libGL.so. After this the aptitude upgrade for the package succeeds. Turns out the new link is identical to the old one, so it was only a case of the script being confused somehow.
Nothing more needed here by me. -- package nvidia-glx-173-dev 173.14.20-0ubuntu3 failed to install/upgrade: subprocess new pre-installation script returned error exit status 2 https://bugs.launchpad.net/bugs/456075 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers-173 in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp