[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 #5 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
The edid has the base block repeated over where the second extension block
should be. Maybe a problem with the ddc segment address handling.

Hmm. Looks like the monitor is hooked up via MST. I see we fail to set he
no_stop_bit flag on the remote i2c reads, which could explain the segment
address being reset by the sink back to 0 before we read the extension block,
and then we end up reading the base block instead. I'll cook up a patch for
that.

You could also test passing i915.enable_dp_mst=0 to the kernel cmdline to i915
not use MST.

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