My mouse has no hardware problem and I have checked it on my other system.
In my Debian v9.3 Gnome v3.22.2 system double-click doesn't work in File Manager, LibreOffice, every place so far where I am used to it.
When I double click on the text, it will not be selected.
When I double click on the folder, the folder will not open. I have to right-click once, then select Open from the list.
From the beginning it was not like this, it's been three days that I've faced this problem.
I do not remember changing any particular settings manually.
How do I re-enable double click?
I'm running, (as reported by neofetch):
Debian GNU/Linux 9.3 (stretch)
x86_64 with Gnome 3.22.2 (desktop environment)
ThinkPad Edge E540
Kernel: 4.9.0-5-amd64
Packages: 2481
Shell: bash 4.4.12
DE: GNOME
WM: GNOME Shell
Theme: Adwaita [GTK2/3]
CPU: Intel i5-4300M (4) @ 3.3GHz
GPU: NVIDIA GeForce GT 740M
Memory: 3674MB


sudo apt install neofetch, then runneofetch --stdout | grep 'DE:\|WM:'and report what that shows.