Thank you Nuno for reporting the trouble you observed. I'm the one who posted this very bug report where you added your comment.
I can understand your frustration. I'm frustrated too. I'm using open- source nouveau driver instead and it has problems, too cf. https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1547077 , and on top of that all these are regressions from older Ubuntu releases. In any case, in any open-source and unpaid context, please refrain from using several question marks or writing some words in all capital letters, as its main effect is to turn people away. Thank you for your attention. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nvidia-graphics-drivers-361 in Ubuntu. https://bugs.launchpad.net/bugs/1553554 Title: Selecting nvidia driver using software-properties-gtk yields package nvidia-361 361.28-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 30 Status in nvidia-graphics-drivers-361 package in Ubuntu: Triaged Bug description: Similar to https://bugs.launchpad.net/ubuntu/+source/bbswitch/+bug/1552108 https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-352/+bug/1552109 This happened when trying a workaround to https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1547077 ProblemType: Package DistroRelease: Ubuntu 16.04 Package: nvidia-361 361.28-0ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-9.24-generic 4.4.3 Uname: Linux 4.4.0-9-generic x86_64 ApportVersion: 2.20-0ubuntu3 Architecture: amd64 Date: Sat Mar 5 19:23:21 2016 ErrorMessage: subprocess installed post-installation script returned error exit status 30 InstallationDate: Installed on 2016-02-03 (30 days ago) InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160203) RelatedPackageVersions: dpkg 1.18.4ubuntu1 apt 1.2.4 SourcePackage: nvidia-graphics-drivers-361 Title: package nvidia-361 361.28-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 30 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-361/+bug/1553554/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

