Additional notifications that there are updates available to install appear on screen even if previous notifications have not been dismissed,

[Dominic Davis-Foster]

Having left my computer logged in but locked for a few days, I came back to it to find 9 dialog boxes notifying me that there are new updates to install. I would have expected a new dialog to only appear if there is not already a dialog present on the screen, otherwise a lot of these dialogs could build up.

Ubuntu Release Info:
Description: Ubuntu 18.04.4 LTS
Release: 18.04

notify-osd version: 0.9.35+16.04.20160415-0ubuntu2

A screenshot showing the 9 dialogs is attached. These all originally appeared on top of each other in the centre of the screen, but I moved them to see how many there were.

I think this is actually a bug in either the Software or Software Updater programs, but running `ubuntu-bug -w` and clicking the dialog showed notify-osd as the program responsible for the window.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: notify-osd 0.9.35+16.04.20160415-0ubuntu2
ProcVersionSignature: Ubuntu 5.0.0-23.24~18.04.1-generic 5.0.15
Uname: Linux 5.0.21+ x86_64
ApportVersion: 2.20.9-0ubuntu7.14
Architecture: amd64
CurrentDesktop: Unity:Unity7:ubuntu
Date: Mon Apr 27 21:08:25 2020
DesktopSession: 'ubuntu'
ExecutablePath: /usr/lib/x86_64-linux-gnu/notify-osd
GtkTheme: 'Ambiance'
IconTheme: 'ubuntu-mono-dark'
InstallationDate: Installed on 2020-02-07 (80 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
MachineType: System manufacturer System Product Name
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.21+ root=UUID=97111647-8898-45cb-94b2-704f31e37b9c ro quiet splash vt.handoff=1
RelatedPackageVersions:
 xserver-xorg N/A
 libgl1-mesa-glx 19.2.8-0ubuntu0~18.04.3
 libdrm2 2.4.99-1ubuntu1~18.04.2
 xserver-xorg-video-intel N/A
 xserver-xorg-video-ati N/A
SourcePackage: notify-osd
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/16/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2901
dmi.board.asset.tag: Default string
dmi.board.name: ROG STRIX B450-I GAMING
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2901:bd10/16/2019:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnROGSTRIXB450-IGAMING:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer