[Bug 1969376] [NEW] Installer of Ubuntu 22.04 beta crashes - mutiple bugs

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* Main error: subiquity crashes without giving any reason or data.    ** BUG1 **
subiquity is the current desktop installer since 21.04 STS, right?

What I did:
I try to install fresh Kubuntu 22.04 and downloaded the fresh installer image dated 18.04.2022
and put it in an USB stick.
My system has 2 disks: 2 TB SSD with 9 partitions and 8 TB HDD with 13 partitions.
My OS partitions have 128 GB size each - so I use manual disk mode to select the partition (sdb5),
let format with ext4 and  mounted to /, efi and swap seems to be recognized, while efi written
in partition overview but not mentioned. In former times I could specify sdb2 as /boot/efi -
but this is no longer possible (or I don't get it) - as I don't want it to be formatted.
I would like GRUB to be installed, but not configured. But if configured would be still ok.
May be a reasonable option with the manual partitioning selection. ** FEATURE REQUEST **
When asked about boot loader I use /dev/sda - should not harm even if wrong - but I think
one may use efi partition here? Which is no longer selectable from the partition table ...
When everything is given, the installer crashes - no data.

All choices I do make when installing (may cause something I am not aware of):
English as language, German keyboard with layout German (no dead keys),
normal installation, download updates while installing, install 3rd party SW,
Disk setup: manual, selecting sdb5 to create ext4 FS and mount as /, was not able
to mark sdb2 as /boot/grub - but it was recognized as EFI (my system has 2 EFI partitions,
one on each disk), Boot Loader was left as /dev/sda which creates a warning (but nothing
about a real problem - only that it may not boot - but I would do it with GRUB master
manually anyway - so if THIS CAUSES THE CRASH - then the message is misleadingly wrong!).
So only GRUB configuring may fail - which should in no way cause an installer to crash
(at least I hope so!), and German time (in former installers this was called Berlin time ...
 little bit strange that this was changed without reason). 
My HW: Silent Workstation, Ryzen 5 3600 [Zen2], Radeon RX 5700 XT [Navi10/RDNA1], 4k 31.5" BenQ.

* Other errors/regressions I encountered:

1) ** BUG2 **
   When selecting keyboard and layout (for me German/no dead keys), one could formerly test it
   by typing. I think that this is important and missing it is a regression.
   But what is really a shame that with no dead keys the given layout is just wrong,
   as the "ALTGR" combinations are missing, e.g. "*/+/~" on one key with "~" just missing ...
   not an unimportant character, is it?
   All 3 versions with subiquity has just a reduced layout for keyboard.
   Does Canonical really want such a regression in the flagship version???

2) ** BUG3 **
   Using a 4k 31.5" screen I could not see the partition table graphically.
   This worked with the old installer like a charm - now I see only a few partitions,
   not even all sda and of cause nothing of sdb which I have to use.
   I know what I am doing - but still it is a warm feeling to check that I format an
   OLD Ubuntu xv partition no longer in use then just typing in blind!

3) ** BUG4 **
   When trying to install 21.04 I first had my normal configuration - 4k screen on DP and
   4k TV on HDMI (powered but off - still visible for GNU/Linux) - and I was not presented
   anything.
   After disconnecting HDMI I saw the installer - I hope, this bug has been fixed - not tested
   this again.
   HDMI is a toy and DP is the professional interface ... so I would prefer the same image,
   but if only one port is selected, it should clearly be DP which is to be preferred.

Background:
I am an experienced Unix consulant using GNU/Linux since 1994 and Ubuntu right from the start.
I tried installing Kubuntu 21.04 STS and 21.10 STS - all without success.
The last success was with 20.10 Groovy - and of cause KDE neon (Focal/20.04 LTS based) before.
But now the LTS version seems to have this problem, too.
If I could try something, please send some info and I will come back with my findings.

Best wishes,
JMB

** Affects: subiquity (Ubuntu)
     Importance: Undecided
         Status: New

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Installer of Ubuntu 22.04 beta crashes - mutiple bugs
https://bugs.launchpad.net/bugs/1969376
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