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.
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https://bugs.launchpad.net/bugs/1294510
Title:
unity-system-compositor crashed [what(): Failed to set DRM crtc]
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