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After updating systemd from 259-1ubuntu2 to 259-1ubuntu3 on Ubuntu
26.04, mouse and touchpad clicks suddenly stop working.
The system logs show GNOME Shell losing input device control with errors:
"Could not open device /dev/input/event*:
GDBus.Error:org.freedesktop.login1.NotInControl: You are not in control of this
session"
Switch to TTY and restart GDM (sudo systemctl restart gdm3) helped.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: systemd 259-1ubuntu3
ProcVersionSignature: Ubuntu 6.18.0-9.9-generic 6.18.5
Uname: Linux 6.18.0-9-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: pass
Date: Sat Jan 31 19:07:09 2026
InstallationDate: Installed on 2025-12-29 (33 days ago)
InstallationMedia: Ubuntu 26.04 LTS "Resolute Raccoon" - Daily amd64 (20251212)
MachineType: Alienware Alienware Area-51m R2
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=linux
XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.18.0-9-generic
root=UUID=cdc4d8d4-11b1-43ca-b01b-55592864cfde ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
vt.handoff=7
SourcePackage: systemd
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/11/2025
dmi.bios.release: 1.34
dmi.bios.vendor: Alienware
dmi.bios.version: 1.34.0
dmi.board.name: Alienware Area-51m R2
dmi.board.vendor: Alienware
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Alienware
dmi.chassis.version: Not Specified
dmi.modalias:
dmi:bvnAlienware:bvr1.34.0:bd06/11/2025:br1.34:svnAlienware:pnAlienwareArea-51mR2:pvr1.34.0:rvnAlienware:rnAlienwareArea-51mR2:rvrA00:cvnAlienware:ct10:cvrNotSpecified:sku099B:
dmi.product.family: Alienware
dmi.product.name: Alienware Area-51m R2
dmi.product.sku: 099B
dmi.product.version: 1.34.0
dmi.sys.vendor: Alienware
** Affects: gdm3 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute
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Mouse/touchpad clicks stop working after systemd 259-1ubuntu3 update - session
loses seat control
https://bugs.launchpad.net/bugs/2139508
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Bugs, which is subscribed to gdm3 in Ubuntu.
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