How to disable blinking cursor in Gnome 3.8?

Try (in a terminal):

gsettings set org.gnome.desktop.interface cursor-blink false

As your can see the key has been moved to org.gnome.desktop.interface (via GSettings), so you can access it via dconf-editor if you prefer so.

None of the above worked for me on Debian Jessie. I worked out the following solution from recent gnome docs

## Find profile, see also Edit -> Profile Preferences -> Profile ID
gsettings get org.gnome.Terminal.ProfilesList list

## Substitute the relevant profile for UUID below - but include all / and :
gsettings set org.gnome.Terminal.Legacy.Profile:/org/gnome/terminal/legacy/profiles:/:UUID/ cursor-blink-mode off

## Disable globally (except gnome-terminal has its own config)
gsettings set org.gnome.desktop.interface cursor-blink false

---

To automate this for all profiles, enter in bash

for uuid in $(gsettings get org.gnome.Terminal.ProfilesList list | tr -d "[',]"); do
    gsettings set org.gnome.Terminal.Legacy.Profile:/org/gnome/terminal/legacy/profiles:/:${uuid}/ cursor-blink-mode off
done

This retrieves the UUIDs from the profile list as above with gsettings, and removes unneeded characters [',]. The resulting list is used in setting the cursor-blink-mode to off.

Try this. To disables cursor blinking desktop-wide:Just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command(s) below:

gconftool-2 --set /desktop/gnome/interface/cursor_blink --type bool false

To disable blinking just for Gnome Terminal’s Default profile:

gconftool-2 --set /apps/gnome-terminal/profiles/Default/cursor_blink_mode --type string off

^{Source:M.Friedrich}