<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [bdw edp] Screen Flickering" href="https://bugs.freedesktop.org/show_bug.cgi?id=91393#c31">Comment # 31</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [bdw edp] Screen Flickering" href="https://bugs.freedesktop.org/show_bug.cgi?id=91393">bug 91393</a> from <a class="email" href="mailto:mika.kahola@intel.com" title="Mika Kahola <mika.kahola@intel.com>"> Mika Kahola</a> <pre>Created <a href="attachment.cgi?id=119983" name="attach_119983" title="Make DP fast link training option as module parameter">attachment 119983</a> <a href="attachment.cgi?id=119983&action=edit" title="Make DP fast link training option as module parameter">[details]</a> <a href='page.cgi?id=splinter.html&bug=91393&attachment=119983'>[review]</a> Make DP fast link training option as module parameter I wasn't able to replicate this issue of flickering screen with the HW that I had available. However, that doesn't rule out the fact that there truly is a problem. It seems that there are panels out there that simply doesn't like to start DP link training with non-zero values. The patch here makes this fast link training feature as one module parameter (/sys/module/i915/parameters/enable_dp_flt) so you can enable or disable the feature depending on panel support. By default this feature is disabled. The patch applies to drm-intel-nightly. Please, give this patch a try and report back with dmesg log if the problem still exists.</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> </ul> </body> </html>