Description of problem: Upgrading from F24 to F25 causes an external monitor to randomly flicker off and then back on. Version-Release number of selected component (if applicable): 4.8.10-300.fc25.x86_64 fpaste --sysinfo URL = https://paste.fedoraproject.org/494783/14806127 How reproducible: All the time. Steps to Reproduce: 1. Connect Thinkpad to Thinkpad ultradock with external monitor on Displayport 2. Launch programs and start working. Actual results: External monitor starts to flicker off and on randomly. Expected results: No flickering Additional info: This wasn't happening at all with Fedora 24.
This might not be a kernel problem and I think I narrowed down when the flicker happens. I just updated my terminal program ( terminator-1.90-1.fc25.noarch to terminator-0.98-4.fc25.noarch) and clipit (clipit-1.4.2-11.fc24.x86_64) could no longer draw it's window when focused on the terminal window. Testing with Gnome Terminal the same behavior happens. I have to mouse focus off the terminal window to get clipit to draw the window. I also noticed that I can trigger the external monitor flicker when working on on Gnome Terminal or Terminator and I trigger a right click window dialog or I try to issue my hot key to clipit to show my clipboard history.
After further digging around it seems this is a dupe of https://bugzilla.redhat.com/show_bug.cgi?id=1353008 *** This bug has been marked as a duplicate of bug 1353008 ***