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I am learning to configure Ubuntu 18.04 to assist my low vision. I am doing so on 2 gash 64-bit laptops before doing so on my main laptop.

On one, a Dell Vostro 1520, I have everything working to my satisfaction.

On the other, a Toshiba Satellite Pro L300-26R I am having a problem.

I have installed gnome extensions and added a few through the Firefox gnome extensions web site. Although I have not been 100% methodical and consistent, I can work my way around to troubleshoot most problems but this one has me stumped.

I have dash-to-panel extension installed on both machines and aesthetically the desktop looks similar and I think I have checked both side-by-side to see what settings may differ - I can find nothing.

On the Toshiba when I press the extensions button on the dash/panel nothing happens. Whereas on the Dell it lists all my current extensions and their setting. I know I can use tweak - but I want the button to work from the dash-to-panel. Could it really be a machine specific problem, or am I not just diligent and competent enough?

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In the end after a lot of fiddling around I ended up doing a fresh install of 18.04 on the offending Toshiba an doing step by step configuration from scratch, rebooting along the way and checking all was fine.

Dash-to-panel installation went fine as did adding the extensions button to the panel and the button worked. It was at this point that I went to add some themes and icons and when I went to add Telinkrin theme here https://www.gnome-look.org/p/1215199/ and noticed this para for the first time

GTK+ 3.20 or later. Only standard (or Ubuntu) gnome-desktop is supported. Ready for Ubuntu 18.04 Disable gnome-extensions that reside on the headerbar because they mess up the headerbar-theming.

So that is what I did! Now that there is no button there it cannot be pressed to see if it works ornot!!! And for consistancy I removed it from the Vostro also haha.

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