[X2Go-User] Performance on external monitor

[Jonah Benton]

Hi folks,

Super happy x2go user on a Thinkpad P1 Gen2 with a 4k screen running Fedora
with XFCE. I segregate clients and personal work into distinct users and
run 5 or 6 x2go sessions at the same time, switching between them with
desktop workspace hotkeys monitored by the master session. Performance is
great, even video within an x2go session is terrific.

Today the Thinkpad's screen decided to start to fail, so I connected the
laptop over HDMI to a 4k external monitor. Now, unfortunately, x2go
performance is really suffering- window repaints within a session even with
only 1 session are so slow as to be essentially unusable. Window repaints
and other rendering activity on the master X session seem about the same.

All sessions are 3840x2160, using "LAN", "16m-jpeg", image quality 9. I
played a little with those settings but nothing made a material difference.
I don't know anything about the X display architecture or the hardware
path. Any thoughts from anyone who does on any options to improve x2go
performance on an external monitor?

Thanks, cheers,

Jonah
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