<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Reoccuring CPU pipe [A|B] FIFO underrun followed by corrupt external monitor" href="https://bugs.freedesktop.org/show_bug.cgi?id=103029#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Reoccuring CPU pipe [A|B] FIFO underrun followed by corrupt external monitor" href="https://bugs.freedesktop.org/show_bug.cgi?id=103029">bug 103029</a> from <a class="email" href="mailto:martin.weinberg@comcast.net" title="Martin Weinberg <martin.weinberg@comcast.net>"> Martin Weinberg</a> <pre>I am still seeing the error messages logged as of 4.14.16. The weird "loss of sync" corruption on the external monitor does seem to depend on the kernel and I have not seen them as of 4.14.16. My work around has been to undock and redock. That seems to clear the graphics issue without a reboot. In case I wasn't clear, this never happens on the internal LCD. This is a Lenovo T440s on a Lenovo Ultradock with an HDMI 1080p monitor. I really like the dock concept, but the MST hub seems to not play nice under linux. Took years for the HDMI audio pass through to be supported. Kernel: I am trying 4.15.1 now. I just keep trying the new kernels and hope for the best. I am willing to do bisection, if you folks are willing to give me some explicit instructions, but I'm very busy for the next few weeks, so I won't be able to get to that right away. I am also willing to try the drm-tip (much easier than bisection in the short time frame).</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>