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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [KBL] Dell TB16 external displays blank in kernel 4.14.4+"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104425#c21">Comment # 21</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [KBL] Dell TB16 external displays blank in kernel 4.14.4+"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104425">bug 104425</a>
from <span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span></b>
<pre>(In reply to Ian Pilcher from <a href="show_bug.cgi?id=104425#c14">comment #14</a>)
<span class="quote">> (In reply to Jani Nikula from <a href="show_bug.cgi?id=104425#c13">comment #13</a>)
> > Please try UEFI boot and i915.panel_ignore_lid=0 removed.
>
> I've already tried removing i915.panel_ignore_lid=0. (See <a href="show_bug.cgi?id=104425#c4">comment #4</a>.)</span >
I meant UEFI with the parameter removed. Not either or.
(In reply to Paul Menzel from <a href="show_bug.cgi?id=104425#c15">comment #15</a>)
<span class="quote">> Could you please document your theory, why this should make a difference?</span >
Basically all new laptops have shipped with UEFI boot for years. The OEMs don't
appear to test the legacy BIOS boot at all. We've had numerous issues with
legacy boot, and basically we can't support that for new laptops. All bets are
off. Typically, the VBT is different for the two, and often bogus for legacy
boot, and more. Some really mysterious issues have just gone away by switching
to UEFI.</pre>
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