Comment 10 for bug 1183804

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Conrad Yang (cpyang) wrote :

I'm having this issue on both precise and raring on ThinkPad X201.
This issue only appears when external display attached to DisplayPort.

The behavior is consistent with stock/mainline kernel with stock or intel linuxgraphics drivers (3.8.0-26-generic, 3.8.0-27-generic, 3.8.0-27-generic with intel linux-graphics 2013Q2, 3.10.0-997-generic,3.10.0-997-generic with intel linux-graphics 2013Q2).

External display works perfectly on VGA port.

Is this duplicate with Bug #1182386?
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1182386