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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - LVDS blank screen on GM45"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94825#c15">Comment # 15</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - LVDS blank screen on GM45"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94825">bug 94825</a>
from <span class="vcard"><a class="email" href="mailto:rob@solution-space.com" title="Rob Kramer <rob@solution-space.com>"> <span class="fn">Rob Kramer</span></a>
</span></b>
<pre>(In reply to Ville Syrjala from <a href="show_bug.cgi?id=94825#c14">comment #14</a>)
<span class="quote">> > Option 2 also works (hack out VBT setting), but results in messy kernel
> > warnings/backtraces about pipe state mismatches, see previously attached
> > logs.
>
> Those warns shouldn't happen with
> <a href="https://lists.freedesktop.org/archives/intel-gfx/2016-April/091392.html">https://lists.freedesktop.org/archives/intel-gfx/2016-April/091392.html</a></span >
Oh, I have not applied that patch, since I thought it was just some
refactoring. I'll add it tomorrow.
<span class="quote">> > Could my kernel be missing some ACPI stuff? There is CONFIG_ACPI_VIDEO=m,
> > and the module is loaded. I didn't add a new boot log since there wasn't
> > anything new. If you have some ideas on how to debug this, please let me
> > know (I know very little about ACPI)..
>
> It's possible ACPI doesn't implement the _DDC method on your board. We could
> check that from the ACPI tables. Can you take an 'acpidump -b', stuff the
> results into a tarball and attach here?</span >
Ok, I'll do that tomorrow.
<span class="quote">> The question I keep asking myself is "if the panel type is genuinely wrong
> in the VBT, how could Windows work on this board?" Any idea if it does?</span >
Yes, the vendor-provided hdd has windows on it (we use a CF card). That windows
works fine - by which I mean that it shows the windows desktop at the right
resolution.</pre>
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