Helix can't boot without a 2nd monitor attached

Hi,
I maintain a Helix (36984RU) that gets used for presentations. It will not boot to Windows without a second monitor attached. I can hear the fan spin up and the unit gets warm, but the screen remains blank. The only thing I can do is to shutdown by holding down the power button.
When booting with a 2nd monitor or projector attached, the startup Lenovo logo appears on the 2nd screen and the laptop screen remains blank. When the Windows login screen appears, it appears correctly on the laptop screen. I've checked the Windows Screen Resolution page and it correctly shows the laptop monitor as the primary monitor.
This issue presents itself whether or not I disconnect the 2nd monitor prior to shutdown/restart, or whether I remove the 2nd monitor before restart. It also does not make a difference if I start in tablet or docked mode.
I've updated the BIOS to version 1.29 and have checked that the boot display device is set to Thinkpad LCD, and not either of the two displayport options.
Any tips on this would be greatly appreciated,
Thanks!

I don't know what it is - I have Enable Transmit on the Program monitor to enable it to do so, and I can't go back to 7.0 or 6.0 as I'm now working on projects in 7.0.1 and don't want to keep chopping and changing.

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Hi there - I have a strange problem with my Thinkpad T440s:
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They also provided an xorg.log (http://pastebin.com/Qk7nHVwt) which shows nothing suspicious, I guess...
Last edited by madevr (2013-11-18 16:32:21)

Same issue with my T440p. Happens with VGA, DP & HDMI (haven't tested DVI) on the dock. Undocking unfreezes it. If X is running the X server freezes and consumes 20% CPU, if none is running a kworker process does that. Even with no monitor attached it will freeze when the builtin monitor wakes up from sleep (again, undocking helps).
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#0 0x00007fe972febf87 in ioctl () from /usr/lib/libc.so.6
#1 0x00007fe973eb19d4 in drmIoctl () from /usr/lib/libdrm.so.2
#2 0x00007fe971aadc26 in ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so
#3 0x00007fe971aae8dd in ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so
#4 0x00000000004aa031 in xf86DPMSSet ()
#5 0x00000000004aa10a in xf86SaveScreen ()
#6 0x000000000046568d in dixSaveScreens ()
#7 0x0000000000561ee6 in mieqProcessInputEvents ()
#8 0x0000000000474119 in ProcessInputEvents ()
#9 0x00000000004371b2 in ?? ()
#10 0x00000000004269ea in ?? ()
#11 0x00007fe972f2fbc5 in __libc_start_main () from /usr/lib/libc.so.6
#12 0x0000000000426d31 in _start ()
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Last edited by minus7 (2013-11-26 21:31:22)

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Helix can't boot without a 2nd monitor attached

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