Empty software update available notification on the lock screen

[Andi McClure]

For the last couple days (I have only had this laptop for a couple days, I installed first 22.04 then 23.10, I have only noticed this behavior since moving to 23.10) when I open my laptop screen after closing the lid, the login screen sometimes has a strange light gray box at the bottom with a green arrow pointing down. It looks like there is supposed to be text to the right of the arrow, like it is a notification or something, but there is no text.

Usually (I *think* 100% of the time) when I enter my password after seeing the green arrow I have a specific notification waiting for me, saying the "DBX database" (this is something to do with secure boot, it is apparently legitimate) needs to be updated, if I successfully click on this notification before it goes away (it's pretty quick) it opens firmware-updater and asks about updating the DBXes. It is possible the green arrow is the firmware-updater/DBX notification *trying* to display, but the text is not displaying.

In case the DBX notification is the repro for the bug, I will hold off on updating the DBX database until I find out whether you need more information than is currently attached.

ProblemType: Bug
DistroRelease: Ubuntu 23.10
Package: gdm3 45~beta-1ubuntu1
ProcVersionSignature: Ubuntu 6.5.0-9.9-generic 6.5.3
Uname: Linux 6.5.0-9-generic x86_64
ApportVersion: 2.27.0-0ubuntu5
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 20 11:46:30 2023
InstallationDate: Installed on 2023-10-18 (3 days ago)
InstallationMedia: Ubuntu 23.10.1 "Mantic Minotaur" - Release amd64 (20231016.1)
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
SourcePackage: gdm3
UpgradeStatus: No upgrade log present (probably fresh install)

[Andi McClure (andi-mcc)]

Screenshot of green box taken with phone.

[Daniel van Vugt (vanvugt)]

That icon appears to be 'software-update-available' according to our icon theme, so it might be either firmware related or related to the new store (https://github.com/ubuntu/app-center/issues). Not sure - I don't recall seeing it myself.