<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [BAT][SKL] *ERROR* failed to enable link training" href="https://bugs.freedesktop.org/show_bug.cgi?id=101144#c32">Comment # 32</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [BAT][SKL] *ERROR* failed to enable link training" href="https://bugs.freedesktop.org/show_bug.cgi?id=101144">bug 101144</a> from <a class="email" href="mailto:marta.lofstedt@intel.com" title="Marta Löfstedt <marta.lofstedt@intel.com>"> Marta Löfstedt</a> <pre>(In reply to Manasi from <a href="show_bug.cgi?id=101144#c28">comment #28</a>) > Hi Marta, > > Yes that didn't help since the driver thinks that the eDP panel is already > ON, but may be its turning on and off many times generating multiple HPD > pulses. So just disregard the patch. > > One more thing I want you to try is in the igt test itself (kms_flip.c), in > the run_test_on_crtc_set() function, I see that kmstest_unset_all_crtcs() is > called which actually powers off the panel. Could you add a usleep() call > here to sleep for a few ms before actually doing a modeset where it will > power the eDP panel back on. > This might give some time to the panel power sequencer to stabilize before > turning it back on. > > This is one of the tests, I have few more things to debug in mind and I will > send details regarding the second test soon. I tested sleeping for 50ms, but is doesn't help. Also, the issue can also start at: igt@kms_busy@basic-flip-default-*.</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>