This is an amazing bug trail! A lot has been done and @Timo, thanks for the work so far. I have an update that might help.
I have 2 laptops, a ASUS and a Lenovo. They both had the issue. I did a reinstall of Ubuntu 16.04 on the Lenovo keeping the home folder. First I had the "no launcher problem" again but after update and reboot it suddenly worked. The the ASUS laptop got the same issue. I have now 2 laptops one working and one not, with the same software but apparently different settings. I saw the status being set to "Fix released" and assumed that just update+upgrade would bring in the fix. My versions are on both computers: $uname -a 4.4.0-116-generic $apt policy libgl1-mesa-dri libgl1-mesa-dri: Installed: 17.2.8-0ubuntu0~16.04.1 Candidate: 17.2.8-0ubuntu0~16.04.1 $apt policy xserver-xorg-core xserver-xorg-core: Installed: 2:1.18.4-0ubuntu0.7 Candidate: 2:1.18.4-0ubuntu0.7 The not working laptop (ASUS) was switched from the NVIDIA driver to the X.org X server just before the trouble started. There is an odd way of bypassing this bug: Go to the background image and right click and select: "Change Desktop image" You don't want to do this but select: "All Settings". Select: "User accounts". Create a new user. In my case the guest user. (standard, non admin) At least in my case I can use the newly created user WITHOUT ANY PROBLEMS. The newly created user can see and use the launcher. In this way I can at least use the computer. At least it is a temporary fix. The I started looking for differences between my normal user and the new guest user. It is possible to ctrl-alt to a different tty and log in as a different user. Some config must different and make sense but hard to compare and I do not know where to look. So far I only found that the .Xauthority file of both is different. The have the MIT-MAGIC-COOKIE setting with different settings. Removing the .Xauthority file will have the file recreated but does not help in fixing the problem. Please let me know how I can compare both users and where to look. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1735594 Title: [regression] compiz crashes after Mesa upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1735594/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
