[Bug 108081] LG 31MU97 monitor native resolution is 4096x2160, but highest mode found is 3840x2160

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108081

--- Comment #8 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to Brian Vincent from comment #7)
> Here's what I've noticed so far.  I applied your patch, I didn't make clean,
> but I made new image and modules and it rebuilt a drm module, and of course
> I installed it.  I booted it up and I couldn't find a difference, no new
> modes, and the EDID was the same.
> 
> I then tried the same kernel but with i915.enable_dp_mst=0.  No new modes,
> but the EDID no longer has the doubling effect you mentioned.  The EDID is
> all zeros from 0x100 onward.

And otherwise identical to the earlier result?

> 
> Would you like to see the new EDID or dmesg logs from one of these
> configurations?

dmesg with drm.debug=0xe i915.enable_dp_mst=0 might show something useful.

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