https://bugs.freedesktop.org/show_bug.cgi?id=27314
--- Comment #54 from Merlijn Wajer merlijn@wajer.org 2011-08-27 06:10:09 PDT --- I can confirm DisplayPort seems to work for me as well now with Linux 3.1-rc3. It didn't work on previous kernels (I'm not sure if I tested 3.0, but certainly not before 3.0) when using my Dell U2133H monitor.