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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [GLK] no signal after switch resolution from 1080p@23.98"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105887#c50">Comment # 50</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [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:clinton.a.taylor@intel.com" title="Clinton Taylor <clinton.a.taylor@intel.com>"> <span class="fn">Clinton Taylor</span></a>
</span></b>
<pre>(In reply to Clinton Taylor from <a href="show_bug.cgi?id=105887#c49">comment #49</a>)
<span class="quote">> (In reply to Piotr Kasp. from <a href="show_bug.cgi?id=105887#c48">comment #48</a>)
> > Product Code: BOXNUC7CJYH1
> > Regulatory model: NUC7JY
> > Date of Manufacture: 02/18
> > (no project code)
> >
> >
> > but i think doesn't matter same problem is on asrock, MSI etc.
> > its looks like mess arround HDMI 2.0, i tested coffe Lake with LSPCON and
> > there is eveything perfect.
>
> CoffeeLake and GeminiLake use a different clock implementation. This issue</span >
Correction, both CoffeeLake and GeminiLake use the BXT PLL code.
<span class="quote">> appears to be a PLL enable sequence issue when switching for lower to higher
> clock rates.
>
> Issue does not occur if I disable 12 bpc support in the driver.
>
> For a quick test:
>
> In intel_hdmi.c mothod hdmi_12bpc_possible()
>
> add
> return false;</span ></pre>
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