"A message at startup?
This is because you do not “force” a specific mode (OpenGL or Cairo backend). Then use the command Cairo-dock -c (libcairo2) or Cairo-dock -o (OpenGL)."
As seen above, I couldn’t fix that and make that message go away. Any advice is highly appreciated. Newbie here. thanks！
I’ve been using cairo-dock for years but not sure if i can help, do you have cairo-dock-plug-ins installed ?
Yes, it’s installed. Also, just double checked by doing the following commands:
“sudo add-apt-repository ppa:cairo-dock-team/ppa sudo apt-get update”
“sudo apt-get dist-upgrade”
“sudo apt-get install cairo-dock cairo-dock-plug-ins”
“sudo -v”
“echo “deb http://download.tuxfamily.org/glxdock/repository/ubuntu $(lsb_release -sc) cairo-dock ## Cairo-Dock-Stable” | sudo tee -a /etc/apt/sources.list wget -q http://download.tuxfamily.org/glxdock/repository/cairo-dock.gpg -O- | sudo apt-key add - sudo apt-get update sudo apt-get install cairo-dock cairo-dock-plug-ins # OR if it’s already installed => # sudo apt-get dist-upgrade”
one by one. However, I’m still getting this message at startup–“Use OpenGl in Cairo-dock…”
Edit the desktop file and add a “-c” to the end of the exec= line.
Whoa. Add-apt? PPA? I’m lost.
Also I don’t think Cairo has has an update in forever. I’d go for plank. And from Arch, not debian based stuff.
what distro are you running??
apt and debs don’t work on 
This is an Arch based distro. apt commands are meant for ubuntu based distro’s. 
Are you using Endeavour OS? apt isn’t the package manager used on Arch Linux distributions, which instead use pacman (although I can see there is the aur/apt package 
).
https://aur.archlinux.org/packages/aptpac-git 
try to start from terminal . and pass on the command
I think this defeats the purpose of learning pacman commands. 
