Hello @mondalaci, https://github.com/ValveSoftware/steam-for-linux/issues/5460#issuecomment-2253588058 takes priority here. Opt into Steam's client beta and if that new scaling control method isn't behaving as expected, then follow up with the SDL and/or Cinnamon dev(s).
Or better yet, make the Steam client detect OS scaling. I'm using Linux Mint 22 with Cinnamon, and desktop scaling is set to 2, which the Steam client disrespects.
Your system information
Steam client version (build number or date): 1721173382
Distribution (e.g. Ubuntu): Linux Mint 22
Opted into Steam client beta?: [Yes/No] No
Have you checked for system updates?: [Yes/No] Yes
Steam Logs: [generate by running this command in a terminal
tar -zcvf ~/Desktop/steam-logs.tar.gz ~/.steam/steam/logs]steam-logs.tar.gz
GPU: Nvidia/Intel/AMD Nvidia