biber documentation not found by `mthelp` and `texdoc`

[bryango]

• I have read and acknowledged this HOWTO article:
  Submitting a MiKTeX problem report

• Possibly related: Documentation not found #844
• biber__doc package is installed
• I can open the documentation ~/.miktex/texmfs/install/doc/biber/biber.pdf from the GUI console
• However, mthelp and texdoc cannot find the document:

$ /opt/miktex/bin/mthelp biber 

Sorry, but "MiKTeX Help Utility" did not succeed.

The log file hopefully contains the information to get MiKTeX going again:

  /home/$USER/.miktex/texmfs/data/miktex/log/mthelp.log

$ cat /home/$USER/.miktex/texmfs/data/miktex/log/mthelp.log      
2022-08-30 21:01:36,481+0800 INFO  mthelp - this process (2412549) started by zsh in directory /home/$USER with command line: /opt/miktex/bin/mthelp --help
2022-09-06 11:10:55,652+0800 INFO  mthelp - this process (653919) started by zsh in directory /run/media/$USER/Resources/Documents with command line: /opt/miktex/bin/mthelp biber
2022-09-06 11:10:56,012+0800 FATAL mthelp.core - The requested package is unknown.
2022-09-06 11:10:56,012+0800 FATAL mthelp.core - Data: name="biber"
2022-09-06 11:10:56,012+0800 FATAL mthelp.core - Source: Libraries/MiKTeX/PackageManager/PackageDataStore.cpp:403
2022-09-06 11:10:56,013+0800 FATAL mthelp - The requested package is unknown.
2022-09-06 11:10:56,013+0800 FATAL mthelp - Info: name="biber"
2022-09-06 11:10:56,013+0800 FATAL mthelp - Source: Libraries/MiKTeX/PackageManager/PackageDataStore.cpp
2022-09-06 11:10:56,013+0800 FATAL mthelp - Line: 403

• My install of MiKTeX comes from the AUR
• The build script can be found at https://github.com/archlinux/aur/blob/miktex/PKGBUILD

Additional logs about my install

$ /opt/miktex/bin/initexmf --report
ReportDate: 2022-09-06 11:19:50
CurrentVersion: 22.8.28
SetupDate: 2022-08-24 01:11:00
SetupVersion: 22.8
Configuration: Regular
GitInfo: 0462c68b7 / 2022-08-26 16:06:35
OS: Linux 5.10.136-1-MANJARO #1 SMP PREEMPT Thu Aug 11 13:14:01 UTC 2022 x86_64
SharedSetup: no
LinkTargetDirectory: /home/$USER/apps/miktex/bin
PathOkay: yes
LastUpdateCheck: 2022-08-29 19:29:18
LastUpdate: 2022-08-29 19:29:04
LastUpdateDb: 2022-08-29 19:29:18
SystemAdmin: no
RootPrivileges: no
AdminMode: no
Root0: /home/$USER/.miktex/texmfs/config
Root1: /home/$USER/.miktex/texmfs/data
Root2: /home/$USER/.miktex/texmfs/install
UserInstall: /home/$USER/.miktex/texmfs/install
UserConfig: /home/$USER/.miktex/texmfs/config
UserData: /home/$USER/.miktex/texmfs/data

[bryango]

I can confirm that this bug persists in v22.10. @edocevoli Could you please take a look before it's closed due to inactivity? Thank you very much!

[bryango]

An update: texdoc --view biber does work and opens the documentation biber.pdf directly.