https://bugzilla.gnome.org/show_bug.cgi?id=777470
--- Comment #10 from Dan Doel <[email protected]> ---
Actually, Jonas was correct. I have two identical 4K displays connected. Each
takes one DisplayPort cable as input, and MST streams drive two panels in each.
I reset one of the monitors to DisplayPort 1.1 mode, which renders it unable to
expose the MST tiles, and thus it runs in the 3840x2160@30 mode. Hopefully
that's good enough (otherwise I'll have to switch out video cards). I left the
other in DP1.2 mode running at the 60Hz modes. You can see the command outputs
in the "30Hz + 60Hz" files.
Interestingly in this setup, everything is scaled properly on the 30Hz monitor,
but when I drag (Gnome or weston) window to the 60Hz monitor, it suddenly
becomes huge. It will stay huge until I get it back on the 30Hz monitor, and
make it realize it is so (just dragging it there doesn't seem to be enough, but
trying to make it snap to a side is).
And yes, weston-terminal also displays this behavior.
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