Mouse pointer flickers at 200% scaling, with two monitors

Distribution

Mint 21.3

Package version

6.0.4

Graphics hardware in use

NVIDIA GeForce MX250 in On-Demand mode

Frequency

Always

Bug description

With a second monitor attached (this seems to be important!)
When "Monitor scale = 200%" is in force, the mouse pointer flickers on the main monitor (Not the attached monitor)
When "Monitor Scale = 175%" is in force then mouse pointer is NOT flickering.

Steps to reproduce

Plug in second monitor
Select 200% scaling for first monitor
Mouse pointer flickers when stationary, flickers even more when moving - ONLY on primary monitor
Effect can be seen even during mode preview.

Expected behavior

A solid, non-flickering mouse pointer in all scaling amounts, with two monitors

Additional information

Primary monitor: 3840 x 2160
Secondary Monitor: 1920 x 1080 (scale factor = 100%)

System Info:
System:
Kernel: 6.8.0-38-generic x86_64 bits: 64 compiler: N/A Desktop: Cinnamon 6.0.4 tk: GTK 3.24.33
info: mate-panel wm: muffin vt: 7 dm: LightDM 1.30.0 Distro: Linux Mint 21.3 Virginia
base: Ubuntu 22.04 jammy
Machine:
Type: Convertible System: Dell product: Inspiron 7591 2n1 v: N/A serial:
Chassis: type: 31 serial:
Mobo: Dell model: 0NNW5N v: A00 serial: UEFI: Dell v: 1.21.0
date: 08/10/2023
Battery:
ID-1: BAT0 charge: 46.5 Wh (100.0%) condition: 46.5/68.0 Wh (68.4%) volts: 8.3 min: 7.6
model: LGC-LGC8.948 DELL X77XY98 type: Li-ion serial: status: Full
Device-1: hid-0018:04F3:241E.0002-battery model: CUST0000:00 04F3:241E serial: N/A charge: N/A
status: N/A
CPU:
Info: quad core model: Intel Core i7-10510U bits: 64 type: MT MCP smt: enabled
arch: Comet/Whiskey Lake note: check rev: C cache: L1: 256 KiB L2: 1024 KiB L3: 8 MiB
Speed (MHz): avg: 2491 high: 3205 min/max: 400/4900 cores: 1: 2548 2: 2400 3: 2401 4: 2400
5: 3205 6: 797 7: 3013 8: 3164 bogomips: 36799
Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
Graphics:
Device-1: Intel CometLake-U GT2 [UHD Graphics] vendor: Dell driver: i915 v: kernel ports:
active: DP-1,eDP-1 empty: DP-2 bus-ID: 00:02.0 chip-ID: 8086:9b41 class-ID: 0300
Device-2: NVIDIA GP108M [GeForce MX250] vendor: Dell driver: nvidia v: 535.183.01 pcie:
speed: 2.5 GT/s lanes: 2 bus-ID: 3c:00.0 chip-ID: 10de:1d13 class-ID: 0302
Device-3: Realtek Integrated_Webcam_HD type: USB driver: uvcvideo bus-ID: 1-6:3
chip-ID: 0bda:565a class-ID: 0e02 serial:
Display: x11 server: X.Org v: 1.21.1.4 driver: X: loaded: modesetting,nvidia
unloaded: fbdev,nouveau,vesa gpu: i915 display-ID: :0 screens: 1
Screen-1: 0 s-res: 8224x2466 s-dpi: 132 s-size: 1581x474mm (62.2x18.7") s-diag: 1651mm (65")
Monitor-1: DP-1 pos: right model: ARZOPA serial: res: 3840x2160 dpi: 279
size: 350x200mm (13.8x7.9") diag: 403mm (15.9") modes: max: 1920x1080 min: 640x480
Monitor-2: eDP-1 pos: primary,left model: AU Optronics res: 4384x2466 hz: 60 dpi: 324
size: 344x193mm (13.5x7.6") diag: 394mm (15.5") modes: 3840x2160
OpenGL: renderer: Mesa Intel UHD Graphics (CML GT2) v: 4.6 Mesa 23.2.1-1ubuntu3.1~22.04.2
direct render: Yes
Audio:
...

Start by reproducing the issue using Cinnamon 6.0.4 on Linux Mint 21.3 with two monitors, 200% scaling, and the listed graphics setup. No source file or test is identified in the report; investigate the Cinnamon display and pointer-scaling entry points, and consider the issue done when the pointer remains solid on the primary monitor at 200% scaling without regressing other scaling modes.