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LGS avatar Ubuntu

correctly recognize external display refresh rate

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LGS

I have an ASUS PG259QN that I've been connecting to my laptop, which has an NVIDIA RTX 2070 max-Q that allows it to output to external displays. The laptop is a kfocus M1, if anyone is curious about this, and I am using KDE with their drivers package (so ubuntu version is 20.04).

This monitor is one of the few that is able to refresh at a rate of 360 hz. Peculiarly, most of the time when I connect the monitor to the laptop (I'm doing this with a USB-C/thunderbolt to DisplayPort cable) I'm not given the monitor's full refresh rate as an option for how fast the display should refresh within 'settings' (though it will always give the option of 300 Hz). If I unplug the display, wait, and plug it back in sometimes it will correctly recognize the 360 Hz option, and I can select that. However, because it seems to periodically (and I've not been able to detect a pattern describing when this is likely to happen) forget its display settings for external displays, I will plug it in and it will set it back to 60 Hz, with no option to go to 360.

This is really frustrating. So far, I've tried to use xrandr (which doesn't seem to help at all since I'm using nvidia proprietary drivers). I don't even have a monitors.xml file to edit, so I doubt that's what's being read by settings.

Happy to provide more information, as needed. Thanks for your help.

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