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For many years, performing a middle click on a dock item (e.g. Terminal, Files), will open a new instance of the application e.g. if you want two terminal windows open to view side by side.

Recently, this is no longer working and a pinwheel spins for a while and then no action occurs. The only workaround so far is to right click on the icon and choose "New Window"

How can I restore this necessary functionality?

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  • This is likely an issue with the specific apps (e.g. Terminal, Files) rather than the dock as I can't see any significant changes there that would the cause of this. It may be worth opening an issue on the relevant GitHub pages. – David Hewitt Jun 9 '20 at 12:04
  • Middle mouse click works for me, but I compiled Plank from the source. – Storm Jun 9 '20 at 12:06
  • Which application exhibit this behaviour? I tried Firefox and a new window shows up. Terminal and Files instead are just focused and no new window is created. So as suggested by @DavidHewitt it seems an application related issue. – endorama Jun 9 '20 at 14:00
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    terminal and files in particular ones i've noticed. these applications are supplied by elementary, suggesting a common config/issue, and only recently started exhibiting this behaviour in recent months – Simon B Jun 9 '20 at 14:20
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cd && cd Downloads
wget https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/plank/0.11.89-1/plank_0.11.89.orig.tar.xz
tar xf plank_0.11.89.orig.tar.xz
cd plank-0.11.89
 ./configure
make
sudo make install
sudo apt install --reinstall plank libplank*

Additionally to enable zoom in Plank:

Two files need to be edited before you can get the zoom effect, copy/paste.

sudo nano /usr/local/share/plank/themes/Default/dock.theme

Add the following in the end of the file;

ZoomEnabled=true
ZoomPercent=150

Save: [ctrl]+[o] and Exit: [ctrl]+[x]

The last file to edit is the schema file of Plank.

sudo nano /usr/share/glib-2.0/schemas/net.launchpad.plank.gschema.xml

Look for (near the end of the file).

false

Change false to true

Save: [ctrl]+[o] and Exit: [ctrl]+[x]

Last thing.

killall plank&& plank&
plank --preferences

Now enable Zoom effect in preferences.

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  • this answer doesn't appear to have anything to do with the question – Simon B Jun 16 '20 at 11:34

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