Created attachment 914370 [details] Logs for the crash with trace Description of problem: When connecting an external monitor to a Lenovo T440p the laptop monitor turns off and the external monitor works. This lines show up in the logs: Jul 03 09:57:15 titan kernel: [drm:ivybridge_set_fifo_underrun_reporting] *ERROR* uncleared fifo underrun on pipe A Jul 03 09:57:15 titan kernel: [drm:ivb_err_int_handler] *ERROR* Pipe A FIFO underrun Jul 03 09:57:15 titan kernel: [drm:intel_dp_start_link_train] *ERROR* too many full retries, give up Version-Release number of selected component (if applicable): A fedora 20 kernel with a kernel from Rawhide (3.16.0-0.rc3.git2.2.fc21.x86_64). The kernel upgrade was used due to new support for other hardware on the laptop. How reproducible: Always Steps to Reproduce: 1. Boot 2. Connect monitor Actual results: Black laptop screen Expected results: Working laptop screen Additional info:
Created attachment 914372 [details] lspci output
This bug appears to have been reported against 'rawhide' during the Fedora 22 development cycle. Changing version to '22'. More information and reason for this action is here: https://fedoraproject.org/wiki/Fedora_Program_Management/HouseKeeping/Fedora22
Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.