Items that need to be watched
LibreOffice online help was failing with 404 errors from firefox on getting help due to confinement issue ; not a Lubuntu specific issue & fix reported in package 1:7.3.2-0ubuntu1 but reported as needing snapd 2.55.3 too; alas issue remains with snapd 2.55.3+22.04 as fix not yet in repos
Useful links
Item to watch - install alongside, install using existing partition etc for Lubuntu jammy.
grub 2.06
I just rebooted my primary box (I tend to do about fornightly) so itād been running 16 days, and I was hit by the OS_PROBER issue.
My system is dual boot; my other OS being 20.04; but it wasnāt there for me to select in grub, in fact with only a single OS detected I didnāt even see the grub menu.
I havenāt confirmed this is an issue hitting new installs, but I bet it will. When Lubuntu 21.04 reaches EOL my current 21.04 install kept for support purposes will shift to a 22.04 QA-test install & Iāll be noticing this rather regularly I suspect.
Itās not impacting 20.04 installs I believe (last QA-test install with focal daily was 2-3 days ago), but Iām betting itāll hit certain BIOS jammy installs at a minimum (not full-disk or dual-boot types).
This topic created for tracking purposes primarily (itās still early days so this is of no importance currently)
Ran into this issue twice in the past few days installing Kubuntu Jammy and also Ubuntu Mate Jammy on āinstall alongsideā installs. The original bug report is here Bug #1955109.
Planning on testing Lubuntu Jammy later today. 
Thanks @leok
Iām disappointed in that I saw that bug report appear on #ubuntu-bugs-announce, and intended to test for itā¦ but never got around to it 
Alas, it was forgotten and whilst I was convinced Iād seen a report for it; I didnāt find it when this box didnāt have the other OS listed (I think I found the original focal report & it b/c of the focal on it I missed itās importance).
Thank you.
I can confirm this also in Lubuntu Jammy - tested ISO 23-12-2021
http://iso.qa.ubuntu.com/qatracker/milestones/429/builds/241694/testcases/1701/results/
Comment #5 in the bug report suggests a workaround.
Another issues that requires trackingā¦
firefox deb to snap transition.
As noted in a QA-test release-upgrade (from 21.10 to jammy) by @leok
<lubot> [telegram] <Leokolb> Ran an upgrade from 21.10 to Jammy - upgrade went well but Firefox
was not on the menu(installed after the upgrade ..then opened Discover installed Firefox and all
settings were retained (re @kc2bez: In my limited testing it should retain your settings and
extensions.)
<lubot> [telegram] <Leokolb> Test result of upgrade @kc2bez http://iso.qa.ubuntu.com/qatracker/milestones/429/builds/244252/testcases/1310/results/
..
<lubot> [telegram] <kc2bez> I think we will need to provide instructions in the release notes.
Thanks for the QA-testing @Leokolb
Just for the record a new bug report was filed regarding the Firefox snap transition mentioned in above post. . https://bugs.launchpad.net/ubuntu/+source/lubuntu-default-settings/+bug/1960823
firefox deb to snap transition:
I noted in a live QA-test the following comment
Clicking About & then clicking a LINKā¦ after which there is a VERY LOOONG pause before a link opensā¦ I think release notes mention maybe required?? b/c of firefox snap usage; and it being somewhat slower to start on initial run. My USB has no LED to show read/write so it does āfeelā like it didnāt workā¦
I knew to be patient. but new users, or installers who arenāt expecting the package type change, may declare itās not workingā¦
Minor issueā¦
Post install and using the fresh lubuntu system, opening LibreOffice - HELP - Libreoffice.Help
gets firefox opened &
FILE NOT FOUND - file://tmp/lu23267w8nw8.tmp/NewHelp1.htmp (or equivalent file)
but this isnāt likely snap related given date of initial report & Edward/epp1ās report of it in impish too.
Update: issue acknowledged; is not a Lubuntu specific issue but instead a snap confinement issue, and is being worked on.
Two firefoxās have appeared on our ISOs
Thanks to @leok for noticing, however itās now confirmed weāre not alone with this (Ubuntu Desktop canary), so hopefully itāll get fixed soon to & is not a Lubuntu issue directly.
Update: I just noticed Feature Freeze Exception: Seeding the official Firefox snap in Ubuntu Desktop - #207 by oSoMoN - Desktop - Ubuntu Community Hub which I hope is relatedā¦ Maybe the change here of āNoDisplay=trueā will fix this for us 
By the way, I took a ādeeperā look today and theyāre two distinct versions. The snap is a different version than the one installed from the traditional repositories. I looked just to satisfy my own curiosity.
We donāt really need more confirmation. I was just curious.
Update.
I believe the grub issue has been resolved. I can install many systems now without issue, including our āInstall using existing partitionā without needing to manually fix grubā¦ Weāll just watch it.
Weāve changed wallpaper, but currently have an ISO creation issue (Bug #1966168 āJammy Lubuntu and Ubuntu Studio Daily ISO images n...ā : Bugs : Ubuntu CD Images which was closed, but thanks @leok) so we canāt test that, or the two Firefox issues (1963672) now deb package of firefox is just a snap wrapperā¦
The ISO creation issue maybe just a naming issueā¦ RikMills noticed a .IMG file that maybe the ISO.
I have removed the wrongly-named ā.imgā files. The next daily build will produce .iso files again.
quoting Vorlon/Steve Langasek here so that issue will be gone tomorrow with luck
A new bug report was filed regarding custom partitioning on btrfs.
https://bugs.launchpad.net/ubuntu/+source/calamares/+bug/1966774
@leok in QA had an upgrade issue with snap store for upgrades from focal to jammy
This issue is really a concern for 22.04.1 as only impish (21.10) users will see the upgrade process to jammy (22.04) after 22.04ās release, so we can monitor this [for now].
This issue (2 Firefox entries on app menu) is fixed after beta release 20220329.1 - tested 2 machines and all good.
Yup. I was able to grab and test it before todayās .iso dropped (assuming we get one). So far, so good.
Upgrade from Impish to Jammy no longer a problem as per 01.04.2022 - tested both TUI and GUI upgrades and all good- no errors .
Regarding Focal to Jammy - the issue is being worked on and as mentioned by @guiverc still a bit of time before 22.04.01.
Not technically a Jammy-specific problem but worth mentioning, the iso tracker site is now back to performing in a reasonable manner - no longer taking close to two minutes to load some pages.
So, whoever was tracking that, it has been fine for a few days now. For whoever fixed it, thanks.
@leok noted that installs using BTRFS leave an unbootable system.
Bug report - https://bugs.launchpad.net/ubuntu/+source/calamares/+bug/1966774
This is likely an upstream calamares issue as noted by Erich Eickmeyer
@Leok noted in further release-upgrade testing
Just for the record -Not a workaround but tested an Impish btrfs system upgrade to Jammy Lubuntu with no errors
Thank you @leok
Tested today (04-04-2022) upgrading from Lubuntu Focal 20.04.4 LTS to Lubuntu Jammy LTS - on 2 boxes with no errors. All upgrades from Focal and Impish now no longer an issue.