I have an Asus G14 laptop (2020) with an nVidia 2060 GPU.
I have just done a clean install of Zorin 16 Core using the nVidia boot/install option.
Problem #1 is that there is no 60Hz display mode listed for my external 4K display. This display works just fine at 60Hz at both 4096x2160 (native for this display) and 3840x2160 in Windows 10 on the same laptop and HDMI cable. Additionally on my Macbook Pro (2017 with Intel IGPU) also displays correctly at 60Hz with the same HDMI cable. So I know the display, cable and laptop are capable of this configuration.
I have attempted to set a custom display mode from bash but this results in a blank display at 60Hz
Problem #2 (and perhaps this should be a different thread) is that with the external 4K display connected using the nVidia 470 (tested) driver the frame-rate of the desktop drops to very, very low, making the desktop unusable. If I switch to the X.Org Nouveau open source driver, this behavior goes away and the desktop perform as expected (albeit it still stuck at 30Hz --- see problem #1).
There are no issues with the laptop onboard display running and working, only with the external 4K display.
I have done some searching and have not seen these issues here on the forum. If anyone has experienced this or have suggestions it would be appreciated! I am really liking Zorin 16 so far and will switch to Pro if I can get this figured out.
Ohhhhhh, you don't want to be using the TESTED driver, I had nothing but issues with that driver, not being able to utilize my GPU at all. You want to use 470 PROPRIETARY. Is that driver version not available in your Additional Drivers list? If not, were going to have to add it.
Did you try to install nvidia driver from the site ? Might worth a try.
The only problem i have (gtx 1070 user here) is that i cant change resolution in zorin. I am forced to use 3840x2160. If i change it to 1080p i get a black screen and cant do anything. In games however i can change it to whatever i want. That said, if i want to change the refresh rate i can only select auto or 60hz. I have a g-sync monitor in my laptop and i really thought my display could handle 144hz but i am not sure.
OK thanks, am going to try the other 470 one (without the TESTED label). This is what came up by default (top driver)... I switched to the Nouveau driver and it solved the lag issue but would prefer the nVidia driver.
OK so good news switched to the 470 proprietary driver (non-tested) and no lag issues, so that's a win. Still stuck at 30Hz though with either 4K res (4096 or 3840).
Going to swap the HDMI cable, xrandr still reports no 60Hz though. Maybe cable?
It is possible to be a cable issue. But there is an easy way to tell. Look at the writing on the cable. You want to see it say stuff like supports 4K 60 or UHD 60.
Swapped cable and initially no joy, but tried to set custom resolution again and BOOM, it worked, even though the display mode is not listed. Swapped back the original cable and that worked as well.
~$ xrandr --output HDMI-A-0 --mode 4096x2160 --rate 60
HDMI-A-0 connected primary 4096x2160+0+0 (normal left inverted right x axis y axis) 941mm x 529mm
No idea why it didn't work before, maybe it was the junk tested driver.
Display Settings still shows 30Hz but suspect this is because I haven't added the display mode. It's def running at 60Hz now because it's smooth and colors are correct now.