When connecting a second monitor, animation and frequency deteriorate

[poulfly]

Hello, when using two monitors, the animation is noticeably worse and the refresh rate of the screen is noticeably reduced. I feel it visually, but 144hz is programmatically displayed in the system. I want to clarify, 2 monitors are used, 1 of them is the main 144hz and the second 60hz. But even if I now turn off the second monitor at 60hz in the monitor settings, the first one starts working at 144hz and it immediately becomes noticeable.

I noticed this when I had to reinstall the OS to the latest version of linux mint, before that which version I did not remember, it seems it was version 20. So then these monitors worked correctly and the main monitor actually worked at a frequency close to 144hz

Code: Select all

System:    Kernel: 5.4.0-70-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 Desktop: Cinnamon 4.8.6 
           wm: muffin dm: LightDM Distro: Linux Mint 20.1 Ulyssa base: Ubuntu 20.04 focal 
Machine:   Type: Desktop Mobo: Micro-Star model: Z490-A PRO (MS-7C75) v: 1.0 serial: <filter> 
           UEFI: American Megatrends v: 2.20 date: 07/22/2020 
CPU:       Topology: 6-Core model: Intel Core i5-10600KF bits: 64 type: MT MCP arch: N/A 
           L2 cache: 12.0 MiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 98397 
           Speed: 4100 MHz min/max: N/A Core speeds (MHz): 1: 4100 2: 4100 3: 4100 4: 4100 5: 4100 
           6: 4100 7: 4105 8: 4100 9: 4100 10: 4112 11: 4100 12: 4101 
Graphics:  Device-1: NVIDIA GP104 [GeForce GTX 1070 Ti] vendor: ASUSTeK driver: nvidia v: 460.39 
           bus ID: 01:00.0 chip ID: 10de:1b82 
           Display: x11 server: X.Org 1.20.9 driver: nvidia 
           unloaded: fbdev,modesetting,nouveau,vesa tty: N/A 
           OpenGL: renderer: GeForce GTX 1070 Ti/PCIe/SSE2 v: 4.6.0 NVIDIA 460.39 
           direct render: Yes 

[SMG]

You have a very new cpu. I would recommend you switch to the 5.8 kernel in Upgrade Manager.

Open Update Manager. Select View > Linux Kernels and click Continue. Make sure 5.8 is selected on the left panel and then click the top-most option on the right panel. An "Install" button will appear. Install the kernel and then reboot for it to become active.

You are most likely using a different version Nvidia driver than you were before, and that could also be a factor in this difference. I do not know if there is a newer version available in Driver Manager, but if the kernel change does not help, you may want to try the Nvidia-450 driver.