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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [GLK] no signal after switch resolution from 1080p@23.98"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105887#c72">Comment # 72</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [GLK] no signal after switch resolution from 1080p@23.98"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105887">bug 105887</a>
from <span class="vcard"><a class="email" href="mailto:shashank.sharma@intel.com" title="shashank.sharma@intel.com <shashank.sharma@intel.com>"> <span class="fn">shashank.sharma@intel.com</span></a>
</span></b>
<pre>(In reply to Clinton Taylor from <a href="show_bug.cgi?id=105887#c68">comment #68</a>)
<span class="quote">> After bashing my head against he wall for several days I have finally
> determined that the issue is caused by the HDMI level shifter on the board
> and not a driver issue.
>
> After changing the mode from 1080p24 to 1080p50 the scope shows a valid
> clock into the level shifter and a very low amplitude clock on the output to
> the connector. Adding a short delay after the Transcoder is disabled appears
> to solve the issue with the level shifter.
>
> I have attached a scope shot of the waveform into the level shifter (yellow
> trace) and the output to the connector (blue trace).</span >
Hello Clinton,
What kind of level shifter is this ? Is it DP -> HDMI passive LS or something
else ? Do you have any information about it ?
- Shashank</pre>
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