With some more building, it seems compiling qtbase with GCC5 does not help in enabling the upstream (now default in Qt 5.5 & 5.4.2) patches, bringing back the -Bsymbolic for armhf and using the -reduce-relocations option. The symptoms are similar with this qtbase compiled with GCC5. I've saved the compilation at https://launchpad.net/~timo- jyrinki/+archive/ubuntu/qt-reduce-relocations and attaching unity8.log (with "Cannot assign object to list").
** Attachment added: "unity8.log" https://bugs.launchpad.net/ubuntu/+source/unity8/+bug/1403758/+attachment/4406467/+files/unity8.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1403758 Title: Unity8 shows black screen with Qt 5.4.0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/binutils/+bug/1403758/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs