[Bug 99362] no resolutions >=1080p with Acer P7500 and Thinkpad X1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99362

--- Comment #14 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
Everything looks fine based on the log. We are now using 12bpc though whereas
in the past we would have used 8bpc. So that could explain the change in
behaviour. If the signal quality is marginal it's possible the problem would
only manifest in the modes that require the highest bandwidth, which seems to
be the case here.

Are you using a HDMI<->HDMI, DVI<->DVI or HDMI<->DVI cable? Any extra
dongles/adaptors? Trying to eliminate extra dongles and whatnot might help, or
the cable itself might not be of sufficiently high quality so trying another
cable might help. Also if you're using the HDMI connector on the projector it
might make sense to try out the DVI connection instead (AFAICS that projector
should have both?). In theory it should not report 12bpc capability over DVI
which would force us to pick 8bpc.

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