gistfile1.txt

My main partition:
% grep 99999999 /mnt/q/var/log/boot.log
         Starting Cryptography Setup for luks-99999999-8888-7777-6666-555555555555...
[  OK  ] Found device /dev/mapper/luks-99999999-8888-7777-6666-555555555555.
[  OK  ] Started Cryptography Setup for luks-99999999-8888-7777-6666-555555555555.
         Expecting device dev-disk-by\x2duuid-99999999\x2d8888\x2d7777\x2d6666\x2d555555555555.device...
         Expecting device dev-mapper-luks\x2d99999999\x2d8888\x2d7777\x2d6666\x2d555555555555.device...
[  OK  ] Found device /dev/mapper/luks-99999999-8888-7777-6666-555555555555.
………
# I pressed Ctrl+Alt+Delete
………
         Stopping Cryptography Setup for luks-99999999-8888-7777-6666-555555555555...




The added partition:
% grep 12345678 /mnt/q/var/log/boot.log # some manual fixes for control characters
         Expecting device dev-disk-by\x2duuid-12345678\x2d9abc\x2ddef0\x2d1234\x2d56789abcdef0.device...
         Expecting device dev-mapper-luks\x2d12345678\x2d9abc\x2ddef0\x2d1234\x2d56789abcdef0.device...
         Starting Cryptography Setup for luks-12345678-9abc-def0-1234-56789abcdef0...
………
(1 of 2) A start job is running for Cryptography Setup for luks-12345678-9abc-def0-1234-56789abcdef0
(2 of 2) A start job is running for dev-mapper-luks\x2d12345678\x2d9abc\x2ddef0\x2d1234\x2d56789abcdef0.device
# again and again hanging during boot…

# I pressed Ctrl+Alt+Delete
………
         Stopping Cryptography Setup for luks-12345678-9abc-def0-1234-56789abcdef0...
[  OK  ] Stopped Cryptography Setup for luks-12345678-9abc-def0-1234-56789abcdef0.