This is probably due to either: * Lacking hardware cursor support in the Nvidia driver; or * Copying part of each frame from the iGPU to the dGPU is too time consuming in low power modes.
You should be able to avoid both issues by ensuring the external monitor is wired to the iGPU instead of the dGPU. To do that, just don't use the HDMI port and use a USB-C to HDMI cable instead. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/2107708 Title: Mouse lag on external monitor when using Nvidia on-demand GPU mode in Xorg Status in nvidia-graphics-drivers-550 package in Ubuntu: New Status in xorg-server package in Ubuntu: New Bug description: There's a fraction of a second delay when I move the mouse on my external monitor, enough to be easily noticeable. It does not occur when the mouse is on the built-in monitor. This occurs regardless of whether I'm using a physical mouse or the trackpad. It seems to only occur if I've enabled "on demand" mode in the Nvidia settings; if I switch into "performance mode", the lag goes away. ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: xorg 1:7.7+23ubuntu3 ProcVersionSignature: Ubuntu 6.11.0-21.21~24.04.1-generic 6.11.11 Uname: Linux 6.11.0-21-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia .proc.driver.nvidia.capabilities.fabric-imex-mgmt: DeviceFileMinor: 4323 DeviceFileMode: 256 DeviceFileModify: 1 .proc.driver.nvidia.capabilities.gpu0: Error: path was not a regular file. .proc.driver.nvidia.capabilities.mig: Error: path was not a regular file. .proc.driver.nvidia.gpus.0000.01.00.0: Error: path was not a regular file. .proc.driver.nvidia.registry: Binary: "" .proc.driver.nvidia.suspend: suspend hibernate resume .proc.driver.nvidia.suspend_depth: default modeset uvm .proc.driver.nvidia.version: NVRM version: NVIDIA UNIX x86_64 Kernel Module 550.120 Fri Sep 13 10:10:01 UTC 2024 GCC version: ApportVersion: 2.28.1-0ubuntu3.5 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: pass CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Sat Apr 19 14:29:38 2025 DistUpgraded: Fresh install DistroCodename: noble DistroVariant: ubuntu DkmsStatus: virtualbox/7.0.16, 6.11.0-21-generic, x86_64: installed ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation Raptor Lake-S UHD Graphics [8086:a788] (rev 04) (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Raptor Lake-S UHD Graphics [103c:8bab] NVIDIA Corporation AD107M [GeForce RTX 4060 Max-Q / Mobile] [10de:28e0] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company AD107M [GeForce RTX 4060 Max-Q / Mobile] [103c:8bab] InstallationDate: Installed on 2025-04-16 (3 days ago) InstallationMedia: Ubuntu 24.04.2 LTS "Noble Numbat" - Release amd64 (20250215) MachineType: HP OMEN by HP Gaming Laptop 16-wf0xxx ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.11.0-21-generic root=UUID=90df2214-7729-4bdf-8628-4dedbe48bfe8 ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/29/2024 dmi.bios.release: 15.21 dmi.bios.vendor: Insyde dmi.bios.version: F.21 dmi.board.asset.tag: Type2 - Board Asset Tag dmi.board.name: 8BAB dmi.board.vendor: HP dmi.board.version: 76.53 dmi.chassis.asset.tag: Chassis Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: HP dmi.chassis.version: Chassis Version dmi.ec.firmware.release: 76.53 dmi.modalias: dmi:bvnInsyde:bvrF.21:bd05/29/2024:br15.21:efr76.53:svnHP:pnOMENbyHPGamingLaptop16-wf0xxx:pvrType1ProductConfigId:rvnHP:rn8BAB:rvr76.53:cvnHP:ct10:cvrChassisVersion:skuA7QR7UA#ABA: dmi.product.family: 103C_5335M7 HP OMEN dmi.product.name: OMEN by HP Gaming Laptop 16-wf0xxx dmi.product.sku: A7QR7UA#ABA dmi.product.version: Type1ProductConfigId dmi.sys.vendor: HP version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.122-1~ubuntu0.24.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 24.2.8-1ubuntu1~24.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A version.xserver-xorg-core: xserver-xorg-core 2:21.1.12-1ubuntu1.3 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1build1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-550/+bug/2107708/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
