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/1556960 Title: Cannot install nvidia driver using software-properties-gtk. package nvidia-361 361.28-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 255 Status in nvidia-graphics-drivers-361 package in Ubuntu: New Bug description: In trying a workaround for https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1547077 tried once again to install nVidia proprietary driver using software-properties- gtk. Observed: crash report window appears, software-properties-gtk appears to cancel the installation and rollback. This is at least the third time and bug report in a few weeks (not trying to complain, just reporting), details in https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1547077. especially https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1547077/comments/41 https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1547077/comments/42 The glyph bug impact the very process of reporting this as the semi- workaround I use does not work for everything. For example, there's currently no workaround for the context menu in firefox. Thank you for your attention. ProblemType: Package DistroRelease: Ubuntu 16.04 Package: nvidia-361 361.28-0ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-12.28-generic 4.4.4 Uname: Linux 4.4.0-12-generic x86_64 ApportVersion: 2.20-0ubuntu3 Architecture: amd64 Date: Mon Mar 14 14:48:59 2016 ErrorMessage: subprocess installed post-installation script returned error exit status 255 InstallationDate: Installed on 2016-02-03 (39 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 255 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/1556960/+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

