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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [GLK DSI] Black screen after grub - Ubuntu 18.04 - kernel latest tip 21.11.2018"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108826#c149">Comment # 149</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [GLK DSI] Black screen after grub - Ubuntu 18.04 - kernel latest tip 21.11.2018"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108826">bug 108826</a>
from <span class="vcard"><a class="email" href="mailto:stanislav.lisovskiy@intel.com" title="Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>"> <span class="fn">Stanislav Lisovskiy</span></a>
</span></b>
<pre>(In reply to Mark Wynn Garcia from <a href="show_bug.cgi?id=108826#c147">comment #147</a>)
<span class="quote">> Hmmm, so GPIOs 144-145 is for panel 1 (i.e. PNL1_VDDEN,PNL1_BKLTEN) while
> 128-129 is for panel 0 (i.e. PNL0_VDDEN,PNL0_BKLTEN). Don't know why we're
> using panel 1...</span >
As I understand Panel 0 is reserved for eDP just as correspondent GPIOs and
panel 1 is for DSI. This is visible from DSN schematics file. Some of the
signal lines are shared though, there could be an issue with that however I
don't see anything suspicious so far.</pre>
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