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I am trying the Windows insider preview 10.0.21.390.1000 (co_release) with Ubuntu 18.0.4 (and Ubuntu 20.0.4) under WSL 2 to use Emacs in GUI mode without needing VcXsrv. With either version I sometimes (not always) experience the following "glitch". Emacs starts receiving a repeated key even though I am not touching the keyboard nor the mouse (often starting just as I bring the distribution up; bringing up emacs is the main thing I go into Linux for and the main reason I use the computer at all). The key is usually C-c (control c), but is sometimes just c and sometimes " " (space). It happens with both versions of Ubunutu, so it isn't specific to one of them.

I also have Ubuntu (18.0.4) under WSL 1 with VcXsrv and it doesn't experience this issue. So, I am assuming that it is somehow WSL 2 related and possibly related to that release.

Any ideas on the cause and more importantly how should I report this issue to Microsoft. I've never beta tested anything as an external user before.

Note: It appears to only happen when I open the distribution after I have successfully started emacs once before.

intel_chris
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  • I have this occur as well. I wonder if it has something to do with how emacs quits. Specifically, I notice when I start emacs after closing out of it with C-x C-c or SPC q q (my binding), it repeats the last key pressed: C-c or q. I am going to look into how emacs exits a process and see if that is related. – dodgez Nov 10 '21 at 04:54
  • I also experience this with WSL2 on Windows11. Hitting the key that is getting repeated clears it up, but this occurs in places where the last character typed was , or otherwise something that is a shortcut for a GUI element in a dialog that pops up., The repeated character does not appear to always be the last key I pressed, so I wonder if there is an uninitialized variable or structure field that is getting interpreted as a "make" scan-code by the virtualization of the keyboard into wayland (via dbus?). I have experienced this with emacs, Tcl/Tk dialogs, synaptic, and others. – Daniel Glasser Mar 20 '22 at 16:45

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It appears that this is a known issue and will eventually be fixed; see https://github.com/microsoft/wslg/issues/207

Daniel Glasser
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