kernel-packages team mailing list archive

[Sjoerd Simons <sjoerd.simons@xxxxxxxxxxxxxxx>]

Yes this bug remains an issue for me, the problem really is there is no
solution that works for everyone.

Just to recap the problem with these machines is that they have an
external HDMI encoder which is hooked up to the LVDS output of the GPU.
Linux itself doesn't support configuring that encoder, so unless you're
lucky enough that the bios/default hardware setup of the encoder matches
the equipment hooked up to it HDMI output doesn't work. Which leaves two
options:

0) Add a no-lvds quirk, which disables the LVDS output alltogether
1) Not adding a quirk, which does mean HDMI out works if the stars align just right but causes issues for those not using HDMI 
     or those that are less lucky.

Linux upstream picked solution 1, as option 0 causes regression for
those folks which have correctly aligned stars. Which means i'll keep
seeing the issue as i'm not using the HDMI out.

The only real solution for this would be for someone to add support for
the external encoder to the kernel, which is a non-trivial amount of
work and is relatively unlikely to happen as it's a quite old chipset by
now.

-- 
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https://bugs.launchpad.net/bugs/1064924

Title:
  Please add LVDS quirk for the zotac zbox

Status in “linux” package in Ubuntu:
  Incomplete
Status in “linux” source package in Quantal:
  Triaged

Bug description:
  The Zotac ZBOX SD ID12 claims to have an LVDS interface, but that's
  not actually hooked up, thus confusing X slightly

  This has been fixed upstream in:
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=9756fe38d10b2bf90c81dc4d2f17d5632e135364

  and then reverted:
  https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/log/?h=linux-3.8.y&qt=grep&q=drm%2Fi915%3A+no+lvds+quirk+for+Zotac+ZDBOX

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