RESOLVED! As JosJuice told me below, I just needed to re-rip the disc into .wbfs format. I did that last night, and now it runs great, even full screen! I'm so happy I get to play my old favorite again, and now on the computer. 
At any rate, this issue is completely resolved and I don't want anyone to waste any time trying to figure it out. Apparently the message that Dolphin was giving me - "Tried to decrypt data from a non-Wii volume" - had nothing whatsoever to do with my encrypted partition, I got that message because I screwed up ripping it. So no worries, problem solved, read the thread anyway if you want to know a little about how Dolphin reacts to bad rips.
Oh, and one more thing! I just wanted to apologize to the mods for the many posts I made last night. What happened is this: I spent several minutes making my post and hit the publish button. Then a message popped up, something about new posts, and then like a second later I was returned to this subforum. I refreshed the page, but no new post. I was so disappointed because I had done so much work. So I did the only natural thing: I hit the Back button and there was my post still loaded! So I submitted it again to see if I could catch the message, but I wasn't fast enough. Eventually I figured out to submit the post, highlight the message and hit Ctrl-C, then when it forwarded me back into this forum, I hit Ctrl-V in the URL field at the top of my browser. There it was, new posts must be approved by a mod.
Oops.
It seems to me that that is a serious user interface issue. If there's a message someone needs to see, especially a brand new user, *especially* when it's a few sentences long, that should be posted long enough for the user to read it - like a popup that shows until the user clicks on it, THEN the post is submitted for approval. To me personally, that is a serious user interface issue that needs to be resolved. I'm surprised it hasn't come up before. Maybe I just read too slow.
Anyway, here's the original issue if you want to read it anyway:
SYSTEM SPECS:
____________________________________________________
HP Elite 8300 w/ Intel i5-3470 3.2 GHz CPU, 8GB RAM (preinstalled,) and plenty of drive space. Brand new Linux user on elementary OS 6 Odin which is built on Ubuntu 20.04.03 LTS x64. My home partition (where everything is installed) is LUKS encrypted, but I enter the password at initial startup time and it no longer affects me in any way (that I know of.) The command "lspci | grep VGA." (without the quotes) returns the following:
Coming from decades of Windows use, so I do understand basic troubleshooting but I don't have much idea what to do in Linux.
Interested in using Dolphin 5.0 to play one game - Dragon's Lair Trilogy for Wii. Compiled and installed Dolphin 5.0 with no errors, but have never gotten it emulating the game at all.
____________________________________________________
Here's the issue:
Dolphin opens fine and shows my one game, and when I try to run it the game window pops up blank and Dolphin stops responding. I have to force close the entire app and reopen it to try again. Notice the Log window shows nothing.
![[Image: qTArOd4.jpeg]](https://i.imgur.com/qTArOd4.jpeg)
Also I've noticed that when I right click on the game and go to Properties, I get 4 consecutive errors that all say the same thing: "Tried to decrypt data from a non-Wii volume." Still nothing in the Log window.
![[Image: vEwbW2c.jpeg]](https://i.imgur.com/vEwbW2c.jpeg)
I've tried setting it to software video rendering instead of OpenGL but no change. In Config, I'm using all the default options, such as JIT Recompiler and DSP HLE emulation.
____________________________________________________
Please understand that while I do understand how computers work, I'm still pretty new to Linux and don't really know how to do things. I need your patience and step by step instructions, please. That being said, thank you so much for your time and insight - it is greatly appreciated.

At any rate, this issue is completely resolved and I don't want anyone to waste any time trying to figure it out. Apparently the message that Dolphin was giving me - "Tried to decrypt data from a non-Wii volume" - had nothing whatsoever to do with my encrypted partition, I got that message because I screwed up ripping it. So no worries, problem solved, read the thread anyway if you want to know a little about how Dolphin reacts to bad rips.

Oh, and one more thing! I just wanted to apologize to the mods for the many posts I made last night. What happened is this: I spent several minutes making my post and hit the publish button. Then a message popped up, something about new posts, and then like a second later I was returned to this subforum. I refreshed the page, but no new post. I was so disappointed because I had done so much work. So I did the only natural thing: I hit the Back button and there was my post still loaded! So I submitted it again to see if I could catch the message, but I wasn't fast enough. Eventually I figured out to submit the post, highlight the message and hit Ctrl-C, then when it forwarded me back into this forum, I hit Ctrl-V in the URL field at the top of my browser. There it was, new posts must be approved by a mod.
Oops.
It seems to me that that is a serious user interface issue. If there's a message someone needs to see, especially a brand new user, *especially* when it's a few sentences long, that should be posted long enough for the user to read it - like a popup that shows until the user clicks on it, THEN the post is submitted for approval. To me personally, that is a serious user interface issue that needs to be resolved. I'm surprised it hasn't come up before. Maybe I just read too slow.

Anyway, here's the original issue if you want to read it anyway:
SYSTEM SPECS:
____________________________________________________
HP Elite 8300 w/ Intel i5-3470 3.2 GHz CPU, 8GB RAM (preinstalled,) and plenty of drive space. Brand new Linux user on elementary OS 6 Odin which is built on Ubuntu 20.04.03 LTS x64. My home partition (where everything is installed) is LUKS encrypted, but I enter the password at initial startup time and it no longer affects me in any way (that I know of.) The command "lspci | grep VGA." (without the quotes) returns the following:
Code:
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller (rev 09)
Coming from decades of Windows use, so I do understand basic troubleshooting but I don't have much idea what to do in Linux.
Interested in using Dolphin 5.0 to play one game - Dragon's Lair Trilogy for Wii. Compiled and installed Dolphin 5.0 with no errors, but have never gotten it emulating the game at all.
____________________________________________________
Here's the issue:
Dolphin opens fine and shows my one game, and when I try to run it the game window pops up blank and Dolphin stops responding. I have to force close the entire app and reopen it to try again. Notice the Log window shows nothing.
![[Image: qTArOd4.jpeg]](https://i.imgur.com/qTArOd4.jpeg)
Also I've noticed that when I right click on the game and go to Properties, I get 4 consecutive errors that all say the same thing: "Tried to decrypt data from a non-Wii volume." Still nothing in the Log window.
![[Image: vEwbW2c.jpeg]](https://i.imgur.com/vEwbW2c.jpeg)
I've tried setting it to software video rendering instead of OpenGL but no change. In Config, I'm using all the default options, such as JIT Recompiler and DSP HLE emulation.
____________________________________________________
Please understand that while I do understand how computers work, I'm still pretty new to Linux and don't really know how to do things. I need your patience and step by step instructions, please. That being said, thank you so much for your time and insight - it is greatly appreciated.