Comment 10 for bug 1294510

Yes, this is reproducible on updated Trusty. I'm running this on a Lenovo X220, no monitor attached.

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
        Subsystem: Lenovo Device 21da
        Flags: bus master, fast devsel, latency 0, IRQ 49
        Memory at f0000000 (64-bit, non-prefetchable) [size=4M]
        Memory at e0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at 5000 [size=64]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
        Capabilities: [d0] Power Management version 2
        Capabilities: [a4] PCI Advanced Features
        Kernel driver in use: i915

Fresh crash files (from this incident) uploaded to chinstrap:~dholbach/crash/

The way I can reproduce this is easy. Wait for lightdm to come up, log into unity8-mir desktop session, play around a bit, find that you can't log out. Hit Ctrl-Alt-F1, log in, type 'sudo restart lightdm; exit' and log into regular session.