Looks to be chipset-specific - doesn't happen with an MSI 'BM12' USB adapter, which shows up under lsusb as:
Bus 006 Device 002: ID 1131:1004 Integrated System Solution Corp. Bluetooth Device -- Unplugging Belkin USB Bluetooth (F8T017) crashes Xorg https://bugs.launchpad.net/bugs/446226 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs