<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - blank screen at 4k@60Hz DP 1.2" href="https://bugs.freedesktop.org/show_bug.cgi?id=93980#c6">Comment # 6</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - blank screen at 4k@60Hz DP 1.2" href="https://bugs.freedesktop.org/show_bug.cgi?id=93980">bug 93980</a> from <a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> Ville Syrjala</a> <pre>(In reply to Alin M Elena from <a href="show_bug.cgi?id=93980#c5">comment #5</a>) > Current CD clock frequency: 450000 kHz Yep, that's too low for you 4k@60 mode. We'd need to bump to 540 MHz at least. Unfortunately we don't support dynamic cdclk change on SKL yet. There are some patches in flight somewhere to get it done, but last time I looked it still needed more work. In the meantime we should really change things to report the current cdclk as the max cdclk when we don't actually support changing the cdclk, and we need to merge these [1] patches to filter out modes we can't drive. [1] <a href="http://patchwork.freedesktop.org/series/3009/">http://patchwork.freedesktop.org/series/3009/</a></pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>