My Intel NUC Solus machine was able to output 3840 x 2160 @ 60 Hz (through USB-C i.e. DP-3 in xrandr), but has somehow degraded to 30 Hz only at that specific resolution. Budgie Control Center > Displays > Refresh Rate doesn't show any options above 30 Hz. Could someone please advice me how to restore the option for 3840 x 2160 @ 60 Hz? Here's some additional information that hopefully will help troubleshoot:

`
$ xrandr -r 60
Rate 60.00 Hz not available for this size

$ xrandr -q
Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 16384 x 16384
HDMI-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 697mm x 392mm
3840x2160 30.00*
2560x1440 74.78
1920x1080 74.98 60.00 50.00 59.94
1680x1050 59.95
1600x900 74.99 60.00
1280x1024 75.02 69.95 60.02
1440x900 59.89
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 60.00 59.94
720x400 70.08
DP-4 disconnected (normal left inverted right x axis y axis)
`

  • brent likes this.

    • Jumpy

    • Post #3
    • Best Answerset by Jumpy

    brent Interesting. In my case, the problem with the refresh rate was not related to a system update.

    I have now made further testing. The problem with the refresh rate recurred both after rebooting the computer, and also with another distribution Linux Mint, which I have not used or updated for months. Also resetting the computer's BIOS settings did not fix the problem.

    Finally resetting the settings on the onscreen menu of the display followed by rebooting the computer solved the problem. After resetting and rebooting the missing refresh rate of 60 Hz automatically returned to the Solus menus.

    I can't help @Jumpy but I can corroborate that 2 updates ago my refresh were taken away:

    I had 60 and 75. 75 disappeared.

    75 left gaps on the screen edges, so I use 60 anyway...but again, can corroborate my display choices also disappeared.

      • JJumpy

        • Post #3
        • Best Answerset by Jumpy

        brent Interesting. In my case, the problem with the refresh rate was not related to a system update.

        I have now made further testing. The problem with the refresh rate recurred both after rebooting the computer, and also with another distribution Linux Mint, which I have not used or updated for months. Also resetting the computer's BIOS settings did not fix the problem.

        Finally resetting the settings on the onscreen menu of the display followed by rebooting the computer solved the problem. After resetting and rebooting the missing refresh rate of 60 Hz automatically returned to the Solus menus.

          I have a related question.
          I'm on Solus Budgie, Nvidia RTX, on a 27" 4K monitor that supports 60hz, 120hz and 144hz refresh rates.

          On Budgie Control Centre, my refresh rate defaults to 60hz which I have never changed.

          1. If I want to make full use of my monitor's 120hz capability, in addition to changing the "Refresh Rate" within Budgie Control Centre, do I also need to change the refresh rate inside "Nvidia X Server Settings" > "X Server Display Configuration" > Resolution : 3840X2160 and Refresh Rate : 120hz ?

          2. Another question, does "119.88hz" on Budgie Control Settings refer to 120hz refresh rates for my monitor?
            I'm asking coz I don't see a "120hz" refresh rate on Budgie Control Settings.
            Will selecting 119.88hz damage my monitor in the long run?

          Congratulations, you have a Lenovo monitor.

          My apologies, you have a Lenovo monitor.

          This took me an eternity to figure out with both of my Lenovo ThinkVision T27p monitors a while ago, one would occasionally drop down to 30hz from its 60hz max. I noticed this when connecting one of them over USB-C However, because of how they split the lanes with the hub, if you have too many devices connect either to the monitor or your device, you're shit out of luck and it's Russian Roulette on if you will get 30hz or 60hz, or whatever your theoretical maximum refresh rate is.

          Sometimes going into the monitor settings and setting USB Source Selection to USB 2.0 will work, but it's still not a guarantee.

          Solution? Return your Lenovo monitor and save yourself the trouble. Don't have the luxury? Switch to a DisplayPort cable. Don't bother with a Thunderbolt dock and connect up your monitor to that, at least not a Dell one. Don't ask me how I know, my wallet is still angry and 300eur lighter. I would be surprised if you get the high refresh rate over USB-C or see above Russian Roulette.

          I went through a ton of solutions for this and ended up going the route of a DisplayPort + HDMI KVM switch to my MiniPC and desktop, bearing in mind both of my monitors are 4k60 so I have some cheaper options. Maybe a Level1techs KVM would be good for you? 🤷 Assuming you have DP of course, otherwise good luck 🫡 When I need to hook it up to the work-issued Macbook (fortunately rarely), I just grab a Thunderbolt 4 cable and use the built-in KVM on the monitor. A KVM switch may not be the best option in your case, but I'm just saying what might work the best if your device supports DisplayPort.

          Re. 119.88hz, your monitor will typically report multiple modes e.g. 59.499995, or 59.99997, or sometimes literally 60hz. They're all basically the close approximation to the absolute value, sometimes you'll find one works better than another. I've noticed on my Lenovo monitors that the 59.99999hz option provides colors that don't look terrible, whereas the 60hz ones look washed out. Go figure. It shouldn't harm your monitor, but then again all open source software is without warranty so if something happens, that's on you. A monitor shouldn't advertise a mode over EDID if it'll damage the panel.

            JoshStrobl Thank you for sharing this.

            I do regret the purchase, but unfortunately it's an old monitor. If I could go back in time I would choose QHD instead of 4K, and with multiple hdmi ports.

            As you mentioned, in my case, it could have been the monitor setting "USB Source Selection" which I had recently changed to USB 3.0 instead of the misleading yeat correct USB 2.0. The hdmi port is indeed more reliable but in use for another device. USB-C is not recognized unless the pc and monitor are turned on at the same time, so I might sometimes end up with a powered on computer but yeat a blank screen.

                Jumpy You may want to consider a cheap 2-port HDMI switch if the device you are plugging in over USB-C also supports it. I haven't verified this one, to be clear, but it at least advertises 4k120hz so should be okay for your usecase. https://www.aliexpress.com/item/1005006008050845.html (the "8k 60hz" one is what you may want).

                This will probably be the easiest route for you to go if you can, without messing around with the USB-C-based connection being flaky. Otherwise you're kinda up shit creek without a paddle I'm afraid. You could try dropping it back down to 2.0.

                And yea I ran into the same issue as you with both devices needing to be powered up. My problem (dunno about your monitor) is it goes too quickly into power-saving mode then basically turns itself off when there is no signal, so before my device would wake from suspend the monitor would nope out and I'd have to do this unplug and replug dance with the USB-C cable a few times to get it to maybe work.

                  • Bbrent

                    • Post #8

                    related:
                    I have an Acer monitor...but a "new" used Lenovo refurb. So monitor not necessarily the culprit here the lenovo desktop is (?)