<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - Fedora 23 kernels lock up with Lenovo ThinkPad T440s in monitor connected Ultradock" href="https://bugs.freedesktop.org/show_bug.cgi?id=91476#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - Fedora 23 kernels lock up with Lenovo ThinkPad T440s in monitor connected Ultradock" href="https://bugs.freedesktop.org/show_bug.cgi?id=91476">bug 91476</a> from <a class="email" href="mailto:tcallawa@redhat.com" title="Tom Callaway <tcallawa@redhat.com>"> Tom Callaway</a> <pre>Created <a href="attachment.cgi?id=118522" name="attach_118522" title="dmesg log with drm.debug=14 on kernel 4.2.1-300.fc23">attachment 118522</a> <a href="attachment.cgi?id=118522&action=edit" title="dmesg log with drm.debug=14 on kernel 4.2.1-300.fc23">[details]</a> dmesg log with drm.debug=14 on kernel 4.2.1-300.fc23 This continues to be broken with current kernels. I put the Thinkpad in the dock, booted up with drm.debug=14. Plymouth (the graphical boot screen in Fedora) loads up properly on both monitors, but when it drops to the gdm login screen, it only shows up on the laptop panel (the external monitor is black). GNOME slowly loads, but when I bring up the display control panel, it seems to freeze but eventually shows me that it can see the external display, but no matter what I do, it cannot output to it. As a reminder, when I undock the laptop and connect the external monitor to the VGA port, it works as expected. I had to gz the dmesg log file due to its size, there is a LOT of noise in there.</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> <li>You are the assignee for the bug.</li> </ul> </body> </html>