This bug is somewhat expected because fractional scaling works by
rendering the desktop at a higher resolution than your screen. So it
will take more mouse movement for the pointer to cross the screen.
Integer scaling doesn't work that way so the mouse should move at
"normal" speed there.
** Tags added: xrandr-scaling
** Package changed: xorg (Ubuntu) => mutter (Ubuntu)
** Changed in: mutter (Ubuntu)
Importance: Undecided => Low
** Changed in: mutter (Ubuntu)
Status: New => Triaged
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https://bugs.launchpad.net/bugs/1902436
Title:
Mouse slow in fractional scaling
Status in mutter package in Ubuntu:
Triaged
Bug description:
I have a Dell XPS 17 with a 3,840 x 2,400 screen and an external
monitor with 3840 x 1600 resolution. When I use only one of them it
works totally fine. I use the external monitor without scaling and my
notebook display with fractional scaling of 150%. But when i want to
use both at the same time, my mouse starts to be slow. So in this
scenario i have the external monitor at 100% and the notebook screen
at 150%. Everything works fine expect the mouse which is slow,on both
screens. What I found is, when i set both my screens to 200% while
fractional scaling is enabled. The issue is gone. Same with 100%. But
as soon as I start using fractions, the mouse is slow again. I don't
believe it is an power issue because my hardware is mostly in idle.
Also, i tried different mouses over Bluetooth and USB but no change.
I am currently using 20.10 but had the same issue with 20.04. But when
i use Wayland, the problem is gone.
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: xorg 1:7.7+19ubuntu15
ProcVersionSignature: Ubuntu 5.8.0-26.27-generic 5.8.14
Uname: Linux 5.8.0-26-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.capabilities.gpu0: Error: [Errno 21] Is a directory:
'/proc/driver/nvidia/capabilities/gpu0'
.proc.driver.nvidia.capabilities.mig: Error: [Errno 21] Is a directory:
'/proc/driver/nvidia/capabilities/mig'
.proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory:
'/proc/driver/nvidia/gpus/0000:01:00.0'
.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 450.80.02 Wed Sep 23
01:13:39 UTC 2020
GCC version: gcc version 10.2.0 (Ubuntu 10.2.0-13ubuntu1)
ApportVersion: 2.20.11-0ubuntu50
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sun Nov 1 14:01:59 2020
DistUpgraded: 2020-10-30 12:11:16,382 ERROR got error from PostInstallScript
./xorg_fix_proprietary.py (g-exec-error-quark: Failed to execute child process
“./xorg_fix_proprietary.py” (No such file or directory) (8))
DistroCodename: groovy
DistroVariant: ubuntu
DkmsStatus:
evdi, 1.7.0, 5.8.0-26-generic, x86_64: installed
nvidia, 450.80.02, 5.8.0-26-generic, x86_64: installed
soundwire, 1.2.2: added
DpkgLog:
ExtraDebuggingInterest: Yes
GraphicsCard:
Intel Corporation UHD Graphics [8086:9bc4] (rev 05) (prog-if 00 [VGA
controller])
Subsystem: Dell UHD Graphics [1028:098f]
NVIDIA Corporation TU106M [GeForce RTX 2060 Max-Q] [10de:1f12] (rev a1)
(prog-if 00 [VGA controller])
Subsystem: Dell TU106M [GeForce RTX 2060 Max-Q] [1028:098f]
InstallationDate: Installed on 2020-09-19 (42 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
MachineType: Dell Inc. XPS 17 9700
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-26-generic
root=UUID=6d098ea0-9d87-46ec-beb0-cc19a3b20841 ro quiet splash
resume=UUID=723b6007-ad35-4e89-be9e-341d54fe18f8 nouveau.modset=0
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to groovy on 2020-10-30 (2 days ago)
dmi.bios.date: 08/18/2020
dmi.bios.release: 1.3
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.3.2
dmi.board.name: 0P1CHN
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.3.2:bd08/18/2020:br1.3:svnDellInc.:pnXPS179700:pvr:rvnDellInc.:rn0P1CHN:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 17 9700
dmi.product.sku: 098F
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.102-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.1-1
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 2:1.20.9-2ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20200714-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1
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