LyX under WSL2 using VcXsrv (sharing clipboard problems)

[Cris Fuhrman]

Hello,

I recently started using LyX  on my Windows 10 via WSL2 (Ubuntu) with
VcXsrv. The application is snappy and I like configuring the supporting
tools in linux (especially the tex configurations).

Sadly, I can't get the clipboard to work consistently outside of X. For
example:


   1. In Windows, start the VcXsrv
   2. In WSL2, start LyX, create New file
   3. In Windows, copy some text (e.g., from Notepad++)
   4. In LyX paste (this works)
   5. In LyX, change the text, then Copy
   6. In Notepad++, paste (no effect). Windows-V (to show the clipboard
   history) shows no trace of the newly copied text from LyX.
   7. Try steps 2-4 again and it no longer works, implying something
   "breaks" the Xserver in those steps.

I'm able to do copy/paste with other applications such as xfe (file
explorer) and gedit (text editor), so I know my XServer can work properly
(at least sometimes).

Is there some option I need to configure in LyX to get it to use the proper
clipboard that can be shared outside (assuming that is how it's working
with xfe and gedit), or is this a bug?

Here's the build info:

LyX 2.3.5.2 (2020-06-25)
Configuration
  Host type:               x86_64-pc-linux-gnu
  Special build flags:      build=release std-regex use-hunspell use-aspell
use-enchant
  Bundled libraries:       (none)
  C++ Compiler:            g++ (7.5.0)
  C++ Compiler flags:       -fPIC -O2 -std=c++14
  C++ Compiler user flags:  -Wdate-time -D_FORTIFY_SOURCE=2 -std=c++14  -g
-O2 -fdebug-prefix-map
=/build/lyx-aqV8hd/lyx-2.3.5.2=. -fstack-protector-strong -Wformat
-Werror=format-security
  Linker flags:
  Linker user flags:       -Wl,-z,defs -Wl,--as-needed
-Wl,-Bsymbolic-functions -Wl,-z,relro
  Qt Frontend:
      Qt version:          5.9.5
  Packaging:               posix
  LyX binary dir:          /usr/bin
  LyX files dir:           /usr/share/lyx

Regards,

C. Fuhrman
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