ERROR: ld.so: object '/usr/$LIB/libgamemodeauto.so.0'

Solution 1:

Yeah so you're missing the 32bit libs. Remove gamemode (apt remove gamemode --autoremove), and download the Debian packages:

https://packages.debian.org/sid/amd64/gamemode/download
https://packages.debian.org/sid/amd64/gamemode-daemon/download
https://packages.debian.org/sid/amd64/libgamemode0/download
https://packages.debian.org/sid/amd64/libgamemodeauto0/download
https://packages.debian.org/sid/i386/libgamemode0/download
https://packages.debian.org/sid/i386/libgamemodeauto0/download

then install all .deb's with this command:

apt install -f path/to/gamemode.deb path/to/gamemode-daemon.deb ... This should fix your problem.

Taken from: https://github.com/FeralInteractive/gamemode/issues/254#issuecomment-643648779