<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - [Lenovo ThinkPad T450s] System hang with MST dock" href="https://bugs.freedesktop.org/show_bug.cgi?id=103643#c27">Comment # 27</a> on <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - [Lenovo ThinkPad T450s] System hang with MST dock" href="https://bugs.freedesktop.org/show_bug.cgi?id=103643">bug 103643</a> from <a class="email" href="mailto:johan.freedesktop@thoren.xyz" title="Johan Thorén <johan.freedesktop@thoren.xyz>"> Johan Thorén</a> <pre>Hi Anshuman, 1. Is this issue is seen when u connect a external display directly to laptop without dock? It happens more frequently (it seems) when connected through a dock, but it also happens when using a cable directly to the laptop. 2. Have u screen the display tear issue on embedder panel of laptop. It never happens on the embedded panel, only on external displays. 3. As i see from dmesg logs your external display resolution is 1920x1080, have u observed the issue with other monitors or with other resolution modes. Actually, the resolution of the screen is 1920x1200. I have, however, observed the same behavior on a screen that has 1920x1080 resolution, as well as an older VGA screen with a lower resolution that I don't know as we speak. 4. could you please let me know if you see this issue after running below command echo "2 0 0 0 0 0 0 0" > /sys/kernel/debug/dri/0/i915_pri_wm_latency After running this command I did not notice the problem. Was this command supposed to fix the problem or provoke it? If it's meant to fix it, I will need to test more extensively since I only had the opportunity to test for maybe 20 minutes. Let me know if anything is needed. Thanks for taking the time!</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>