Hmm, I just tried this on Skylake hardware, and "Download updates while installing" isn't doing the trick.
Could be that "Download updates while installing" is broken on the 16.04 ISOs, or this could be a result of the phased updates done by the Ubuntu Software Updater and related components that use the same code paths. So after installing Ubuntu 16.04, Unity/Compiz was broken. I had to switch to a VT with Control+Alt+F1, login, and then run: sudo apt-get update sudo apt-get dist-upgrade Which gave me the updated libllvm3.8 package. Then after a reboot, everything is shiny and working. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1564156 Title: xenial: invalid opcode when using llvmpipe Status in OEM Priority Project: Fix Committed Status in System76: Fix Released Status in Release Notes for Ubuntu: Fix Released Status in llvm-toolchain-3.8 package in Ubuntu: Fix Released Status in mesa package in Ubuntu: Confirmed Status in llvm-toolchain-3.8 source package in Xenial: Fix Released Status in mesa source package in Xenial: Confirmed Bug description: [Description updated to reflect state of 16.04 release ISO] == In summary == If you have an Intel Skylake (6th gen) CPU and an NVIDIA GPU (or possibly other GPUs that likewise require use of the llvmpipe opengl software fallback), a work-around is needed to install Ubuntu 16.04 desktop. To work-around this, you'll need to: 1) Choose "Install Ubuntu" in the pre-boot menu (rather than "Try Ubuntu without installing") 2) Check "Download updates while installing Ubuntu" ** Note: "Download updates while installing Ubuntu" doesn't currently seem to be working. If after installing 16.04 on effected Skylake hardware you find that Unity/Compiz is broken, switch to a VT with Control+Alt+F1, login, and then run: sudo apt-get update sudo apt-get dist-upgrade You should see the `libllvm3.8` package get updated. After a reboot, Unity/Compiz should be working. == In detail == The Ubuntu 16.04 desktop ISOs include libllvm3.8 1:3.8-2ubuntu1, which has a bug that results in invalid JIT code generation when using the mesa llvmpipe opengl software fallback on Skylake CPUs. When you encounter this bug, Unity/Compiz will fail to start, and you'll see something like this in dmesg: [ 2092.557913] traps: compiz[10155] trap invalid opcode ip:7efc940030d4 sp:7ffccd914ea0 error:0 libllvm3.8 1:3.8-2ubuntu3 fixes this issue, but the fix did not make it onto the 16.04 release ISOs. It will be included on the 16.04.1 ISOs. To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1564156/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
