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<body><span class="vcard"><a class="email" href="mailto:lakshminarayana.vudum@intel.com" title="Lakshmi <lakshminarayana.vudum@intel.com>"> <span class="fn">Lakshmi</span></a>
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<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>
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<td>anshuman.gupta@intel.com
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<b><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#c30">Comment # 30</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 <span class="vcard"><a class="email" href="mailto:lakshminarayana.vudum@intel.com" title="Lakshmi <lakshminarayana.vudum@intel.com>"> <span class="fn">Lakshmi</span></a>
</span></b>
<pre>(In reply to Johan Thorén from <a href="show_bug.cgi?id=103643#c27">comment #27</a>)
<span class="quote">> 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!</span >
@Anshuman, any further suggestions?</pre>
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