New information about that bug: In the /var/log/upstart/ubiquity.log the last message is always "Permission denied". Unfortunately there is no hint for what.. I tried to start the installer with sudo (sudo ubiquity ...) and also as user "root" but the error message still the same.
I do not believe that this is a grub error but seems to be installer related. First I thought that it occurs only when the installation has finished or almost finished but I played around a little to try things out. The first thing I need to say is that in all my previous tests I had waited until the installer seems to be finished (that means "copying files" is finished and the installer waits for the user input of timezone, username etc). I then tried to go through the installer questions directly when the installation starts that means it copies the files in the background and I set timezone etc in parallel. Well if I do it that way the installer window disappear and seems to crash. Same error in the mentioned log. So it has nothing to do with grub but seems to be installer related. The other thing I want to mention is that it seems to crash directly after it want to start "Installing the base system". I saw that by luck the last time i tried it and directly then it crashes. Sorry for pointing first in the wrong direction but I hope it is better to understand and/or reproducable now. Thanks Thomas -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1000934 Title: Parallel installation with Windows fails! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1000934/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs