[Bug 97529] i915 kms turns display black on Asus T100HA (Intel Atom x5-Z8500)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97529

--- Comment #32 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to Ville Syrjala from comment #31)
> (In reply to Jonas Aaberg from comment #30)
> > I get a few error prints from time to time:
> > --
> > [  264.110049] [drm:intel_pipe_update_end [i915]] *ERROR* Atomic update
> > failure on pipe A (start=13947 end=13948) time 14 us, min 1272, max 1279,
> > scanline start 1280, end 1282
> 
> Interesting. That would suggest that scanline_offset is a bit off for DSI.
> I'll fire up intel_display_poller on my DSI machine and see what it says.

Oh dear. It looks like the frame counter increments somewhere in the middle of
the line rather than at the start of hsync like it does on every other output
type :(

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