Problem
I am experiencing something very odd on Xubuntu 24.04.3 LTS x86_64 with Xfce 4.18.
It seems that if I ever reduce the scale of one of my screens, as in the GUI below,
then my mouse pointing on the other screen will flicker.
Restoring to the previous configuration 
immediately makes the problem go away.
Specs and Logs
vulkaninfo --summary returns
WARNING: [Loader Message] Code 0 : terminator_CreateInstance: Received return code -3 from call to vkCreateInstance in ICD /usr/lib/x86_64-linux-gnu/libvulkan_dzn.so. Skipping this driver. ========== VULKANINFO ========== Vulkan Instance Version: 1.3.275 Instance Extensions: count = 24 ------------------------------- VK_EXT_acquire_drm_display : extension revision 1 VK_EXT_acquire_xlib_display : extension revision 1 VK_EXT_debug_report : extension revision 10 VK_EXT_debug_utils : extension revision 2 VK_EXT_direct_mode_display : extension revision 1 VK_EXT_display_surface_counter : extension revision 1 VK_EXT_headless_surface : extension revision 1 VK_EXT_surface_maintenance1 : extension revision 1 VK_EXT_swapchain_colorspace : extension revision 5 VK_KHR_device_group_creation : extension revision 1 VK_KHR_display : extension revision 23 VK_KHR_external_fence_capabilities : extension revision 1 VK_KHR_external_memory_capabilities : extension revision 1 VK_KHR_external_semaphore_capabilities : extension revision 1 VK_KHR_get_display_properties2 : extension revision 1 VK_KHR_get_physical_device_properties2 : extension revision 2 VK_KHR_get_surface_capabilities2 : extension revision 1 VK_KHR_portability_enumeration : extension revision 1 VK_KHR_surface : extension revision 25 VK_KHR_surface_protected_capabilities : extension revision 1 VK_KHR_wayland_surface : extension revision 6 VK_KHR_xcb_surface : extension revision 6 VK_KHR_xlib_surface : extension revision 6 VK_LUNARG_direct_driver_loading : extension revision 1 Instance Layers: count = 7 -------------------------- VK_LAYER_INTEL_nullhw INTEL NULL HW 1.1.73 version 1 VK_LAYER_MESA_device_select Linux device selection layer 1.4.303 version 1 VK_LAYER_MESA_overlay Mesa Overlay layer 1.4.303 version 1 VK_LAYER_VALVE_steam_fossilize_32 Steam Pipeline Caching Layer 1.3.207 version 1 VK_LAYER_VALVE_steam_fossilize_64 Steam Pipeline Caching Layer 1.3.207 version 1 VK_LAYER_VALVE_steam_overlay_32 Steam Overlay Layer 1.3.207 version 1 VK_LAYER_VALVE_steam_overlay_64 Steam Overlay Layer 1.3.207 version 1 Devices: ======== GPU0: apiVersion = 1.4.318 driverVersion = 25.2.5 vendorID = 0x8086 deviceID = 0x3ea0 deviceType = PHYSICAL_DEVICE_TYPE_INTEGRATED_GPU deviceName = Intel(R) UHD Graphics 620 (WHL GT2) driverID = DRIVER_ID_INTEL_OPEN_SOURCE_MESA driverName = Intel open-source Mesa driver driverInfo = Mesa 25.2.5 - kisak-mesa PPA conformanceVersion = 1.4.0.0 deviceUUID = 8680a03e-0000-0000-0002-000000000000 driverUUID = f1327354-3445-70a5-c424-85c896a8e286 GPU1: apiVersion = 1.4.318 driverVersion = 25.2.5 vendorID = 0x10005 deviceID = 0x0000 deviceType = PHYSICAL_DEVICE_TYPE_CPU deviceName = llvmpipe (LLVM 20.1.8, 256 bits) driverID = DRIVER_ID_MESA_LLVMPIPE driverName = llvmpipe driverInfo = Mesa 25.2.5 - kisak-mesa PPA (LLVM 20.1.8) conformanceVersion = 1.3.1.1 deviceUUID = 6d657361-3235-2e32-2e35-202d206b6900 driverUUID = 6c6c766d-7069-7065-5555-494400000000 I am reluctant to solve this with xrandr. I used that years ago and I remember it breaking things once I installed a second monitor.
I do not use xserver-xorg-video-intel.
The issue seems reduced if I disable display compositing.
