Ubuntu Flavor ISO Testing & Bug Hunts - 20.04 Beta

Lubuntu 20.04 LTS release time is approaching fast. The Lubuntu team is still hard at work with the final polishing of our Focal Fossa, or 18th release of Lubuntu, and our first LTS release (fourth overall) with the new LXQt desktop.

On April 2nd, we’ll be releasing the beta release of Lubuntu 20.04 LTS, with new features already fixed including user interface and documentation.

Between April 2nd and April 23rd, all efforts will be focused on testing our product before final release, and of course fixing any bugs found during those tests.

From April 2nd to April 8th, we’ll be having a “Ubuntu Testing Week”, where we strongly encourage you to download the daily ISO image, and give it a try. Of course you’re welcome to do this anytime.

There are a variety of ways that you can help test the release, including trying out the various live session and install test cases from the ISO tracker, which take less than 30 minutes to complete (eg. Alan Pope’s look at Lubuntu https://www.youtube.com/watch?v=lOCWwLwN7xE)

You can test without changing your system by running it in a VM (Virtual Machine) with software like VMWare Player, Virtualbox or Gnome Boxes, or running it in the live session from a USB or DVD, so you can also test if your hardware works correctly. We encourage those that are willing, to install it either in a VM or on physical hardware and use it continuously for a few days, as more bugs can be reported this way (video: how to report a bug).

Please test applications that you regularly use, so you can identify bugs and regressions (changes introduced which break functionality) that should be reported. New ISO files are built everyday, and you should always test with the most up-to-date ISO. If you have bandwidth quota limits; tools like zsync can reduce the bandwidth required to refresh your ISO rather than re-download it all.

If you need help with any of this, please just ask us using your favorite support resource (see https://lubuntu.me/links/ or https://discourse.lubuntu.me/), but also available is live chat on IRC (#ubuntu-quality) or telegram (UbuntuTesters). For guidelines we suggest you read our wiki page.

We’ll love all the spare time anyone can provide, to help test our upcoming Lubuntu 20.04 LTS release, and make this the best Lubuntu release ever. If you’ve finished testing our release, and still have spare time, the other Ubuntu flavors would benefit from your time and testing.


Alan Pope has produced a video on using zsync. I’ll provide this link

Alan Pope’s video is great if you’re new to testing, and want to know how to save bandwidth, or learn more about downloading and especially using zsync.

Erich Eickmeyer (Ubuntu Studio) has also created scripts for each flavor to assist downloading using zsync, which can be found at https://github.com/eeickmeyer/UbuntuDailySync


The beta for Lubuntu 20.04 LTS (Focal Fossa) has now been released




On BDLL (big daddy linux live) I just saw mentioned a zsync video I hadn’t seen before.

Posting as zsync I find a terrific tool, given I have monthly bandwidth quotas.

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There is an issue with the label for persistence in Focal Fossa. The new standard label is ‘writable’ but the classic label ‘casper-rw’ should work too, if found during boot. Due to a race condition this fails in some computers. There is a ‘hack’ by an Ubuntu developer, that solves the problem in my computers. Does it solve the problem also in your computer(s)?

A problem with this bug is that old and slow computers are more affected than new and fast computers. So I think Lubuntu users may have more problems than users of standard Ubuntu. Anyway we need more tests in order to give feedback as soon as possible in order to get a good Lubuntu 20.04 LTS iso file.

I created a thread for this purpose at the Ubuntu Forums. Please have a look at it and if you have time, please test how it works with the label ‘casper-rw’ in your [oldest 64-bit] computers.

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Acknowledged @sudodus (I’ll respond on UF).

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Will check this a bit later today and respond on UF.


See you guys at the Ubuntu Forums, where I have added some details to help you do the tests :slight_smile:

Persistent live systems can be created from the Lubuntu Focal release candidate iso files (both in UEFI mode and BIOS mode). it works with the new label writable as well as with the classic label casper-rw.