<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - i915:No display with Display port [drm:intel_dp_start_link_train] *ERROR* too many full retries, give up" href="https://bugs.freedesktop.org/show_bug.cgi?id=90963#c54">Comment # 54</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - i915:No display with Display port [drm:intel_dp_start_link_train] *ERROR* too many full retries, give up" href="https://bugs.freedesktop.org/show_bug.cgi?id=90963">bug 90963</a> from <a class="email" href="mailto:fabio.coatti@gmail.com" title="Fabio Coatti <fabio.coatti@gmail.com>"> Fabio Coatti</a> <pre>Hi all, I'm getting more or less the same issues. environment: linux 4.5.3 xf86-video-intel 2.99.917_p20160423 (and several earlier versions) Intel(R) Core(TM) i5-3427U CPU @ 1.80GHz mesa 11.2.1 (gentoo based, vanilla kernel) External monitor: Dell U2415 short description: I'm using KDE in multi-monitor setup; if I switch to console with Alt+F2, i start to see messages like this: [gio mag 5 15:05:29 2016] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared fifo underrun on pipe A [gio mag 5 15:05:29 2016] [drm:ironlake_irq_handler] *ERROR* CPU pipe A FIFO underrun [gio mag 5 15:05:29 2016] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared pch fifo underrun on pch transcoder A [gio mag 5 15:05:29 2016] [drm:cpt_irq_handler] *ERROR* PCH transcoder A FIFO underrun [gio mag 5 15:05:29 2016] [drm:intel_check_cpu_fifo_underruns] *ERROR* fifo underrun on pipe B [gio mag 5 15:05:29 2016] [drm:intel_check_pch_fifo_underruns] *ERROR* pch fifo underrun on pch transcoder B [gio mag 5 15:05:29 2016] [drm:intel_check_cpu_fifo_underruns] *ERROR* fifo underrun on pipe B After that, swotching back to graphic mode causes external monitor to enter power save mode; plugging out the monitor causes this message: [gio mag 5 15:06:15 2016] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared pch fifo underrun on pch transcoder B Reconnecting it does not help, while swtiching it off causes both screens to go blank; switching back it on makes the laptop screen to come back to life, the external one still in powersave and the dmesg fills up with a lot of the following messages: [gio mag 5 15:20:54 2016] [drm:intel_dp_start_link_train] *ERROR* failed to train DP, aborting [gio mag 5 15:20:54 2016] [drm:intel_dp_link_training_clock_recovery] *ERROR* too many full retries, give up [gio mag 5 15:20:54 2016] [drm:intel_dp_link_training_clock_recovery] *ERROR* too many full retries, give up [gio mag 5 15:20:54 2016] [drm:intel_dp_link_training_clock_recovery] *ERROR* too many full retries, give up [gio mag 5 15:20:54 2016] [drm:intel_dp_link_training_clock_recovery] *ERROR* too many full retries, give up [gio mag 5 15:20:54 2016] [drm:intel_dp_link_training_clock_recovery] *ERROR* too many full retries, give up [gio mag 5 15:20:54 2016] [drm:intel_dp_link_training_clock_recovery] *ERROR* too many full retries, give up [gio mag 5 15:20:54 2016] [drm:intel_dp_link_training_clock_recovery] *ERROR* too many full retries, give up [gio mag 5 15:20:54 2016] [drm:intel_dp_start_link_train] *ERROR* failed to train DP, aborting The only way to recover is to turn off the laptop and start it again.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>