Comment # 9
on bug 42960
from Sandeep
I booted Linux 3.13.6 with the drm.debug=4 parameter - it looks like the internal LVDS output is set to use a different CRTC than the HDMI output, even in clone mode. The LVDS monitor's backlight is also off, it does not switch on at all or get enabled after suspend and resume. Only a full system restart will bring it back to life.
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