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[Bug 762855] Re: [sandybridge-m-gt2+] Display on external monitor (vga) is black on 13" MacBook Pro 8, 1 (x86_64)

 

Also:

[ 1848.479911] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 377962, at 377962], missed IRQ?
[ 1955.746330] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
[ 1956.152692] [drm:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up
[ 1956.155454] [drm:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up
[ 2003.480655] [drm:ironlake_crtc_disable] *ERROR* failed to disable transcoder

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https://bugs.launchpad.net/bugs/762855

Title:
  [sandybridge-m-gt2+] Display on external monitor (vga) is black on 13"
  MacBook Pro 8,1 (x86_64)


References