Keys stuck on repeat when key triggers sound, and output device is ClearOne Chat 50

[Chris]

When I am typing in a gnome terminal, any time I press a key that triggers a sound (e.g., hitting "backspace" when already at the beginning of the command line, hitting "tab" for tab completion when there are multiple possible completion options), the key gets stuck on repeat. The sound plays over and over. If I move the mouse to other windows and focus on them, the repeated key continues there. (I have focus-follows-mouse enabled, if that matters.)

This is 100% reproducible. But I have tracked it down to only occuring when I go into Settings->Sounds, select the "Output" tab, and choose the "Analog Output - Chat 50" device for sound output.

I do have a ClearOne Chat 50 plugged into my computer via USB. It seems to be operating correctly for both input and output sound (ignoring the key repeat issue).

Before figuring out that changing the sound output to be something other than the Chat 50, I ruled out the keyboard being the problem by swapping in a different model of USB keyboard. I also rebooted the system, and that made no difference either.

I saw other bugs about repeating keys, such as bug #124406. I did try disabling repeat with "xset r off". This seems to stop the repeated key from taking effect in, say, Gnome terminal. But the repeating key is probably still being issued somewhere in the system because when I then trigger the bug the keyboard becomes unusable until I unplug it and plug it back in again.

In all cases, unplugging the USB keyboard and plugging it back in again eliminates the stuck repeating key.

I apologize for not selecting a particular package for this bug. This bug does only seem to occur when the ClearOne Chat 50 is selected as the output sound device, but I'm completely unclear about how an output sound device could case key presses to operate incorrectly. I does not seem like the sound device should be able to cause a keypress to repeat even if the sound driver is buggy.

Ubuntu 18.04.4 LTS.
Linux mal 4.15.0-96-generic #97-Ubuntu SMP Wed Apr 1 03:25:46 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

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