Public bug reported:
On a lenovo notebook running precise with quantal LTS stack has this
issue. When connecting through VGA port, laptop monitor and external
monitor will enter extend mode. But after pressing FN+F3 to switching
mode, both laptop monitor and external monitor will become black screen,
and system is hang, you need to force to power off. When connecting
external monitor through HDMI, everything is OK.
CPU: Intel(R) Core(TM) i3-4000M CPU @ 2.40GHz
GPU: Intel Corporation Haswell Integrated Graphics Controller [8086:0416]
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: xserver-xorg-video-intel-lts-quantal (Ubuntu)
Importance: Medium
Status: Confirmed
** Tags: blocks-hwcert-enablement
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https://bugs.launchpad.net/bugs/1202524
Title:
Switch VGA mode will become black screen
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