Installing VirtualBox Guest Additions Makes Linux Guest Load With a Blank or Black Screen

Case: VirtualBox 6.1.16, host Solus Linux 4.1, guest Peppermint 10. After installing guest additions by inserting the iso into the guest and rebooting, the guest OS shows only a blank, black screen with cursor on top.

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Solus Linux 4.1 Audio Device Disappears After Rebooting

Case: After logging in, the sound control icon is displayed as muted. Clicking on it to display Audio Volume settings and sliders, appears blank – no settings and sliders. Audio Volume Settings window -> Audio tab has all settings grayed out, no audio device detected.

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Can’t Login to NoMachine But Logins Are Correct, Error: “Authentication failed, please try again.”

Case: Can’t connect to NoMachine over LAN due to authentication failure, yet logins are the right ones. Log at /usr/NX/var/log/nxerror.log reveals: Authentication failed with error 7.

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