This issue is similar to the un-answered seen here:
But I can say that the physical keyboard is not the problem
(Even bought the exact same make/model as I previous had - as the old was getting "nasty", and I thought that maybe was the cause)
But no, the "shift + m" will not produce anything
(neither left nor right shift)
With 'Caps Lock' on, the M key works, but also pressing shift will then not make lower case m (nothing shown).
The keyboard works fine on Windows 10
The OS-language is US-English, and I've tried (to no avail) with keyboard in US-English, Danish or Norwegian
(none of the three has "shift + m" working)
OS: Zorin OS 16.1 x86_64
Host: Akoya P4130 D MD8302/2471 1.0
Kernel: 5.15.0-46-generic
sudo lshw -short|nl #"relevant excerpt"
1 H/W path Device Class Description
2 =========================================================
3 system Akoya P4130 D MD8302/2471 (ML-110000 10021220)
Thanks for catching that. I meant "dk"...
And your output is normal.
Ah...
I wonder if you performed;
mv ~/.config ~/.config-bk
Then log out and back in or rebooted if resetting all your config to default may help then.
Another option would be to migrate your files to your newly created user and abandon the non-working user account...