Also experiencing this issue on a W530 running Fedora 18 with 3.11.10.
My second monitor is connected via the Lenovo dock connector. The bug
does not appear if the display adapter is switched to Discrete mode in
BIOS. I have also experienced this bug on a projector connected via VGA.

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor 
Graphics Controller (rev 09) (prog-if 00 [VGA controller])
        Subsystem: Lenovo Device 21f5
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 44
        Region 0: Memory at f1400000 (64-bit, non-prefetchable) [size=4M]
        Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M]
        Region 4: I/O ports at 5000 [size=64]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: <access denied>
        Kernel driver in use: i915

01:00.0 VGA compatible controller: NVIDIA Corporation GK107 [Quadro K1000M] 
(rev a1) (prog-if 00 [VGA controller])
        Subsystem: Lenovo Device 21f5
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at f0000000 (32-bit, non-prefetchable) [size=16M]
        Region 1: Memory at c0000000 (64-bit, prefetchable) [size=256M]
        Region 3: Memory at d0000000 (64-bit, prefetchable) [size=32M]
        Region 5: I/O ports at 4000 [size=128]
        Expansion ROM at f1000000 [disabled] [size=512K]
        Capabilities: <access denied>
        Kernel driver in use: nouveau

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which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1228506

Title:
  [prime] unsynchronised rendering on secondary displays

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https://bugs.launchpad.net/nouveau/+bug/1228506/+subscriptions

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