Comment 3 for bug 894073

At request of Seb, we backported Tomi's hdmi patches that went upstream after 3.1 release from tracking to tilt-3.1. They provide some good architectural improvements but expose a big problem with two heads on dss, there is no mediation about who owns the common pll. Result is that i had to disable the new dvi "panel" driver to stop hdmi workability getting destroyed by dvi resetting the pll to something else.

I discussed with Tomi he says he may add support for pll management but 'no promises'. In themeanwhile best way is deconfigure dvi panel (i guess you didn't configure it) and just use hdmi.