Two "Display" windows appear after unlocking screen saver

[Damon Smyth]

When unlocking the screensaver the user is presented with 2 identical "Display" windows. This is on a system with only one monitor. I did not expect to see one "Display" window, let alone two.

Description: Ubuntu 24.04 LTS
Release: 24.04

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: xorg 1:7.7+23ubuntu3
ProcVersionSignature: Ubuntu 6.8.0-31.31-generic 6.8.1
Uname: Linux 6.8.0-31-generic x86_64
ApportVersion: 2.28.1-0ubuntu2
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: XFCE
Date: Mon May 6 07:41:23 2024
DistUpgraded: 2024-04-28 08:14:17,483 DEBUG migrateToDeb822Sources()
DistroCodename: noble
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 NVIDIA Corporation GT218 [GeForce G210] [10de:0a60] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: Pegatron GT218 [GeForce G210] [1b0a:9057]
InstallationDate: Installed on 2024-02-09 (86 days ago)
InstallationMedia: Xubuntu 23.10 "Mantic Minotaur" - Release amd64 (20231010)
Lsusb:
 Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 002: ID 03f0:094a HP, Inc Optical Mouse [672662-001]
 Bus 001 Device 003: ID 413c:2105 Dell Computer Corp. Model L100 Keyboard
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 004: ID 058f:6366 Alcor Micro Corp. Multi Flash Reader
Lsusb-t:
 /: Bus 001.Port 001: Dev 001, Class=root_hub, Driver=ohci-pci/10p, 12M
     |__ Port 001: Dev 002, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
     |__ Port 002: Dev 003, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
 /: Bus 002.Port 001: Dev 001, Class=root_hub, Driver=ehci-pci/10p, 480M
     |__ Port 009: Dev 004, If 0, Class=Mass Storage, Driver=usb-storage, 480M
MachineType: Hewlett-Packard s5660uk
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-31-generic root=UUID=ee77fe41-0b51-47f6-b32f-154cd37c5fa2 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to noble on 2024-04-28 (8 days ago)
dmi.bios.date: 08/19/2010
dmi.bios.release: 8.15
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 6.12
dmi.board.name: 2A99
dmi.board.vendor: PEGATRON CORPORATION
dmi.board.version: 6.01
dmi.chassis.asset.tag: CZC039BK84
dmi.chassis.type: 3
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr6.12:bd08/19/2010:br8.15:svnHewlett-Packard:pns5660uk:pvr:rvnPEGATRONCORPORATION:rn2A99:rvr6.01:cvnHewlett-Packard:ct3:cvrChassisVersion:skuXH785EA#ABU:
dmi.product.family: 103C_53316J G=D
dmi.product.name: s5660uk
dmi.product.sku: XH785EA#ABU
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.120-2build1
version.libgl1-mesa-dri: libgl1-mesa-dri 24.0.5-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.12-1ubuntu1
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