Public bug reported: I tried to install the 32-bit ubuntu-14.04.1-desktop-i386.iso on an older, but working computer with a 2 GHz AMD Sempron processor with 4 GiB of RAM. This system would seem to handily exceed the system requirements. By "working", I mean that it has been running Windows XP for years.
The distribution did not install a graphics driver for the integrated graphics chip, so I installed an AMD/ATI video card, downloaded the latest driver from the AMD web site, and installed the driver. On reboot, the system crashed while initializing the desktop. The apport bug report tool was launched, but as far as I can tell it did not upload the crash report. I'm not sure why. Before clicking on "send", I browsed thru the report details. It said the internal error was in /usr/bin/compiz. Further down in the report was a disassembly of a code fragment which showed instructions from the SSE extensions to the x86 instruction set. The AMD Sempron processor does not support SSE extensions to the architecture. Executing code that contains those instructions on this type of processor will result in an illegal instruction exception. I don't know if compiz was compiled with the wrong compiler flags for i386, or if it contains optimization that assumed the extensions were present instead of checking the appropriate CPUID feature bits. ** Affects: compiz (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/1409608 Title: The 32-bit i386 install executes SSE instructions. Status in compiz package in Ubuntu: New Bug description: I tried to install the 32-bit ubuntu-14.04.1-desktop-i386.iso on an older, but working computer with a 2 GHz AMD Sempron processor with 4 GiB of RAM. This system would seem to handily exceed the system requirements. By "working", I mean that it has been running Windows XP for years. The distribution did not install a graphics driver for the integrated graphics chip, so I installed an AMD/ATI video card, downloaded the latest driver from the AMD web site, and installed the driver. On reboot, the system crashed while initializing the desktop. The apport bug report tool was launched, but as far as I can tell it did not upload the crash report. I'm not sure why. Before clicking on "send", I browsed thru the report details. It said the internal error was in /usr/bin/compiz. Further down in the report was a disassembly of a code fragment which showed instructions from the SSE extensions to the x86 instruction set. The AMD Sempron processor does not support SSE extensions to the architecture. Executing code that contains those instructions on this type of processor will result in an illegal instruction exception. I don't know if compiz was compiled with the wrong compiler flags for i386, or if it contains optimization that assumed the extensions were present instead of checking the appropriate CPUID feature bits. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1409608/+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