[SOLVED] Incorrect ViewPortIn keeps reverting after reboot

[twinklepoo]

I can't pinpoint the exact moment this started happening, but I noticed the issue when I tried to screenshot my whole desktop with non-built-in screenshot tools (stock Mint one works fine). Only the upper part of the screens was captured, so I went to check nvidia settings. I was surprised to see that both my monitors showed double the resolution. I tried to change ViewPortIn and Panning to native resolutions, but for some frustrating reason, the settings reset on each boot. I tried to save it to xorg.conf, but it doesn't want to stick. The native monitor resolutions are 2560x1440 and 1920x1080 respectively. Any help is appreciated, because this has been one very frustrating afternoon.

System info

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System:
  Kernel: 5.15.0-58-generic x86_64 bits: 64 compiler: gcc v: 11.3.0 Desktop: Cinnamon 5.6.7
    tk: GTK 3.24.33 wm: muffin dm: LightDM Distro: Linux Mint 21.1 Vera base: Ubuntu 22.04 jammy
Machine:
  Type: Desktop System: Gigabyte product: Z390 AORUS PRO v: N/A serial: <superuser required>
  Mobo: Gigabyte model: Z390 AORUS PRO-CF serial: <superuser required> UEFI: American Megatrends
    v: F12 date: 11/05/2021
CPU:
  Info: 6-core model: Intel Core i7-8700K bits: 64 type: MT MCP arch: Coffee Lake rev: A cache:
    L1: 384 KiB L2: 1.5 MiB L3: 12 MiB
  Speed (MHz): avg: 4396 high: 4400 min/max: 800/4700 cores: 1: 4396 2: 4400 3: 4398 4: 4395
    5: 4399 6: 4386 7: 4397 8: 4399 9: 4399 10: 4400 11: 4400 12: 4392 bogomips: 88796
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
Graphics:
  Device-1: NVIDIA TU104 [GeForce RTX 2070 SUPER] vendor: Gigabyte driver: nvidia v: 525.78.01
    pcie: speed: 8 GT/s lanes: 16 ports: active: none off: DP-3,HDMI-A-1 empty: DP-1,DP-2
    bus-ID: 01:00.0 chip-ID: 10de:1e84
  Display: x11 server: X.Org v: 1.21.1.3 driver: X: loaded: nvidia gpu: nvidia display-ID: :0
    screens: 1
  Screen-1: 0 s-res: 7936x2304 s-dpi: 108
  Monitor-1: DP-4 pos: primary,left res: 4096x2304 dpi: 174 diag: 685mm (27")
  Monitor-2: HDMI-0 pos: right res: 3840x2160 dpi: 163 diag: 686mm (27")
  OpenGL: renderer: NVIDIA GeForce RTX 2070 SUPER/PCIe/SSE2 v: 4.6.0 NVIDIA 525.78.01
    direct render: Yes

$ xrandr

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Screen 0: minimum 8 x 8, current 7936 x 2304, maximum 32767 x 32767
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected 3840x2160+4096+0 (normal left inverted right x axis y axis) 598mm x 336mm
   1920x1080     60.00*+  59.94    50.00  
   1600x1200     60.00  
   1280x1024     75.02    60.02  
   1280x720      60.00    59.94    50.00  
   1152x864      75.00  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   720x576       50.00  
   720x480       59.94  
   640x480       75.00    59.94    59.93  
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 connected primary 4096x2304+0+0 (normal left inverted right x axis y axis) 597mm x 336mm
   2560x1440     59.95 + 165.08*  143.91   120.00  
   2048x1152     60.00  
   1920x1200     59.88  
   1920x1080    119.88    60.00    59.94    50.00    23.98  
   1680x1050     59.95  
   1600x1200     60.00  
   1280x1024     75.02    60.02  
   1280x800      59.81  
   1280x720      59.94    50.00  
   1152x864      75.00  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   720x576       50.00  
   720x480       59.94  
   640x480       75.00    59.94    59.93  
DP-5 disconnected (normal left inverted right x axis y axis)

EDIT:

Okay, I seem to be an absolute idiot, apparently. It occurred to me fractional scaling might be the reason. A bit frustrating, nonetheless, but at least I know why it's happening.