[Bug 94095] Sandybridge-M 8086:0106 can't output to HDMI "invalid format" displayed on display

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94095

Ville Syrjala <ville.syrjala at linux.intel.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |NEEDINFO

--- Comment #7 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to Calico Bass from comment #0)
> Sandybridge-M 8086:0106 can't output to HDMI  "invalid format" displayed on
> display
>...
> The display is fine and works via HDMI with a PS3 at 1080i, a DVD at 480 and
> another laptop with ivybridge.

Well, that makes this quite difficult. In general SNB and IVB are _very_
closely related in terms of display output hardware.

Can you grab the dmesg, with drm.debug=0xe passed to the kernel command line,
from _both_ machines after booting up with this display connected? Also reg
dump from both machines would be good, when the display is connected and
active.

Also 'intel_reg read --count 10 0xE4F00' from both machines might be
interesting, although I'm not actually sure these buffer translation values do
anything in HDMI mode.

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