<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - Regression with Dell TB16 dock and Linux kernel 4.16.x" href="https://bugs.freedesktop.org/show_bug.cgi?id=106250#c12">Comment # 12</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - Regression with Dell TB16 dock and Linux kernel 4.16.x" href="https://bugs.freedesktop.org/show_bug.cgi?id=106250">bug 106250</a> from <a class="email" href="mailto:stanislav.lisovskiy@intel.com" title="Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>"> Stanislav Lisovskiy</a> <pre>I've discovered one more "funny" issue, which probably Patrik was also facing: each second time, when Thunderbolt is disconnected and then connected back, the external display doesn't work. I've checked with logs + added own traces - seems that kernel(4.18-rc7) sends hotplug event as it should, however each second time, we don't get drm_mode_setcrtc for PIPE_B from userspace. To me it looks like a userspace issue, as kernel seems to reach properly. I've attached the corresponding logs (not_working_pipe_b - for not working case and working_pipe_b - for working case). It changes for each second time mostly, which indicates some logic problem and the only difference is that we simply don't get drm_mode_setcrtc for pipe B despite that hotplug was sent through sysfs, which was verified by additional traces(see the logs).</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>