[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

Brian Vincent <brainn at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #4 from Brian Vincent <brainn at gmail.com> ---
Yes.  I can get the native resolution (4096x2160) to work in X.  For a long
time, I've used the following mode line:

xrandr --newmode "4096x2160_60" 556.730  4096 4104 4136 4176  2160 2208 2216
2222 +hsync +vsync

But I noticed in the DRI source code that a DMT mode for 4096x2160 at 60hz exists,
so I tried that too, and it also works fine:

xrandr --newmode "4096x2160_60" 556.744  4096 4104 4136 4176  2160 2208 2216
2222 +hsync +vsync

I'm currently using a Dell XPS 15 9560, with a base station attached using a
thunderbolt port.  The monitor is connected to the base station with a full
sized display port cable.

I've compiled drm-tip and included the kernel parameters you wanted.  I waited
a while before logging in and capturing this dmesg I'm attaching.

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