Press "Cancel" button during initial "waiting on 16 modules to load" causes Calamares to hang

[MarkF]

ISO testing 20.04 Lubuntu daily image (20200317). If I click the "Cancel" button while Calamares is starting up, displaying the "waiting on n modules to load... 4 seconds," it hangs.

Even right-clicking the Calamares placeholder in the taskbar, and "close" doesn't entirely get rid of it. The Calamares window disappears. But, the "Lubuntu inst... [Killing]" placeholder remains in the taskbar.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: calamares 3.2.20-0ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-18.22-generic 5.4.24
Uname: Linux 5.4.0-18-generic x86_64
.etc.calamares.modules.finished.conf:
 ---
 restartNowMode: user-checked
 restartNowCommand: "systemctl -i reboot"
.etc.calamares.modules.partition.conf:
 efiSystemPartition: "/boot/efi"
 enableLuksAutomatedPartitioning: true
 userSwapChoices: none
 drawNestedPartitions: true
 defaultFileSystemType: "ext4"
.etc.calamares.modules.shellprocess_logs.conf:
 ---
 dontChroot: true
 timeout: 30
 script:
     - calamares-logs-helper @@ROOT@@
.etc.calamares.modules.unpackfs.conf:
 ---
 unpack:
     - source: "/cdrom/casper/filesystem.squashfs"
         sourcefs: "squashfs"
         destination: ""
ApportVersion: 2.20.11-0ubuntu20
Architecture: amd64
CasperVersion: 1.441
CurrentDesktop: LXQt
Date: Tue Mar 17 19:31:14 2020
LiveMediaBuild: Lubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200317)
RelatedPackageVersions:
 calamares-settings-ubuntu-common 1:20.04.2
 calamares-settings-lubuntu 1:20.04.2
 xfsprogs 5.3.0-1ubuntu1
 btrfs-progs 5.4.1-2
SourcePackage: calamares
UpgradeStatus: No upgrade log present (probably fresh install)

[MarkF (az2008)]

I am able to recreate this error on a Ryzen 5/Vega 8 laptop[1]. I had to hit the "cancel" button very fast (being disconnected from wifi seems to help slow the Calamares process down, and make it easier to click cancel soon enough to cause the hang.).

The machine I first reported this bug on is pretty slow. It's easier to recreate (especially if you're not connected to wifi). This machine is much faster, and is harder to recreate.

[1] Ryzen 5 3500u; Radeon Vega 8; Atheros QCA6174 (Acer Aspire 5 A515-43-R5RE laptop).

[Simon Quigley (tsimonq2)]

Is this still an issue with a supported version of Lubuntu?

[Launchpad Janitor (janitor)]

[Expired for calamares (Ubuntu) because there has been no activity for 60 days.]