Jani, Thank you for explaining further. After checking the manual for my motherboard, I am mistaken. It specifies DVI-I and states the maximum resolution over DVI is 1920x1200@60Hz, so it appears all is well. The fact it worked before is a happy accident.
I have since switched to use displayport, and it is detecting the native resolution as expected. Thank you for your time, BR, Kenneth On Mon, Mar 31, 2014 at 3:43 AM, Jani Nikula <jani.nik...@linux.intel.com>wrote: > On Sun, 30 Mar 2014, Kenneth de Mello <kdemello1...@gmail.com> wrote: > > What about dual-link DVI? I though the additional link addressed the > > pixel clock limitation. Has it only been using a single link this > entire > > time, and it's only worked by ignoring the maximum dotclock, so in other > > words, the fact it works at all is the bug? > > > > Also, the commit that rejects mode exceeding 165MHz states: > > > > "Single-link DVI max dotclock is 165MHz. Filter out modes with higher > > dotclock when the monitor doesn't support HDMI." > > > > Does this mean HDMI in general? This monitor does support HDMI, but the > > maximum resolution when using the physical HDMI ports is 1920x1080. > > > > What is the solution here, to switch to displayport if I want to use > kernel > > 3.13.7 and beyond? (This is fine, I just need to know so I can buy the > > cable). > > For further details please see the bug report [1]. > > The reason for the change was that modes with higher than 165 MHz > dotclock are invalid for single-link DVI. We don't support dual-link DVI > natively. Thus this is about HDMI->DVI adapters which are either > dual-link DVI (Ville says highly unlikely) or single-link DVI that allow > higher than 165 MHz dotclock in the monitor end. I'm not sure how we > could distinguish that from a regular single-link DVI that *is* bound by > the maximum dotclock. > > Product details for the adapter you're using might be interesting. > > BR, > Jani. > > > > [1] https://bugzilla.kernel.org/show_bug.cgi?id=72961 > > > -- > Jani Nikula, Intel Open Source Technology Center >
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