<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [snb dp dongle] DP-to-dual-HDMI (link_train issue?)" href="https://bugs.freedesktop.org/show_bug.cgi?id=49402#c17">Comment # 17</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [snb dp dongle] DP-to-dual-HDMI (link_train issue?)" href="https://bugs.freedesktop.org/show_bug.cgi?id=49402">bug 49402</a> from <a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> Ville Syrjala</a> <pre>I tried a few random things for this on IVB. - tried to send the training pattern and training lane set with one aux write instead of two. - tried to disable enhanced framing - tried to force some voltage swing/pre-emphasis values - tried with 6 bpc so that we'd get 1.62 links speed instead of 2.7 - tried to send post cursor2 traning values in case that would trick the sink into cooperation Unfortunately none of that helped. The BIOS produces a picture with the dongle, so I tried to compare some of the register values. The main differences I saw were that the BIOS uses auto training for FDI, some of the M/N values were different, and of course the BIOS also has panel fitter active since it's using a 720x400 resolution.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>