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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#c49">Comment # 49</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 Piotr Kasp. from <a href="show_bug.cgi?id=105887#c48">comment #48</a>)
<span class="quote">> 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.</span >
CoffeeLake and GeminiLake use a different clock implementation. This issue
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;</pre>
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