this post was submitted on 15 Aug 2023
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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I remember having this issue, albeit not as workflow-disrupting as you've had it so I never bothered actively searching for a solution. I can confirm however that there is definitely a solution; at some point in my migrations to different distros, the problem stopped showing up, and right now I actually can't reproduce the problem - labels are displayed correctly for me, both on my existing drives and new partitions that I create.
After some digging (and a sleep-deprived me smiting my boot partition during my investigation and having to fix that, LMAO - I never thought it'd happen, but Guix saved me from a reinstall), I found that LUKS1 has some kind of limitation that makes Dolphin not display the label as expected according to this and my own testing, which may be your problem if your drives are still using LUKS1. The Arch Wiki has a section on how to convert to LUKS2 here.
At the very least, if this is not the solution for you, I can say with certainty that it is fixable!
Thanks for this (and for all the trouble you went through to look into it!). My drive headers were still using LUKS1 for some reason, so I booted up a live image, converted the headers to LUKS2, rebooted, and Dolphin didn't care. All the tabs still show Xx T/GiB Encrypted Drive, even though luksDump shows they all have lovely LUKS2 headers, and lsblk shows the drives show up with the expected names.
I'm glad to hear that you found a fix at some point, so I'll keep searching. I really appreciate your help!