Public bug reported: Unity uses sse4 instructions which are not available on older celeron or pentium cpus.
The instruction being used causing unity to crash is PEXTRD In this case one cannot login into the default unity session. current workaround is to install gnome. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: unity 7.3.2+15.04.20150420-0ubuntu1 [modified: usr/bin/unity] ProcVersionSignature: Ubuntu 3.19.0-21.21-generic 3.19.8 Uname: Linux 3.19.0-21-generic x86_64 ApportVersion: 2.17.2-0ubuntu1.1 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CurrentDesktop: GNOME Date: Tue Jun 30 14:32:20 2015 InstallationDate: Installed on 2015-06-29 (0 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) SourcePackage: unity UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: unity (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug gnome3-ppa third-party-packages vivid -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to unity in Ubuntu. Matching subscriptions: dp-unity https://bugs.launchpad.net/bugs/1470097 Title: Unity does not support cpus without sse4 Status in unity package in Ubuntu: New Bug description: Unity uses sse4 instructions which are not available on older celeron or pentium cpus. The instruction being used causing unity to crash is PEXTRD In this case one cannot login into the default unity session. current workaround is to install gnome. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: unity 7.3.2+15.04.20150420-0ubuntu1 [modified: usr/bin/unity] ProcVersionSignature: Ubuntu 3.19.0-21.21-generic 3.19.8 Uname: Linux 3.19.0-21-generic x86_64 ApportVersion: 2.17.2-0ubuntu1.1 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CurrentDesktop: GNOME Date: Tue Jun 30 14:32:20 2015 InstallationDate: Installed on 2015-06-29 (0 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) SourcePackage: unity UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1470097/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp