[Bug 94825] LVDS blank screen on GM45

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94825

--- Comment #15 from Rob Kramer <rob at solution-space.com> ---
(In reply to Ville Syrjala from comment #14)
> > 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
> https://lists.freedesktop.org/archives/intel-gfx/2016-April/091392.html

Oh, I have not applied that patch, since I thought it was just some
refactoring. I'll add it tomorrow.

> > 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?

Ok, I'll do that tomorrow.

> 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?

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.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20160407/3c1b917e/attachment.html>