[LINUX] 40-60 FPS instead of 240 FPS

[koreanfan]

Your system information

• System information from steam (Steam -> Help -> System Information) in a gist: ryzen 5 5600, 32gb ram, rx580, ssd sata, debian stable, steam-installer 1:1.0.0.75+ds-6 amd64, mesa-vulkan-drivers 22.3.6-1+deb12u1 amd64/i386

• Have you checked for system updates?: [Yes/No] yes
• Are you using the latest stable video driver available for your system? [Yes/No] yes
• Have you verified the game files?: [Yes/No] yes

Please describe your issue in as much detail as possible:

Describe what you expected should happen and what did happen. Please link any large pastes as a Github Gist. Launch dota. Play dota with 240fps. But after starting online match i got 40-60fps instead of 240fps. Sometimes fps back to normal(240fps) if you change game resolution to different one and revert back to needed resolution. If you change rendering option in game video settings than fps also may drop below 60. If you change game video resolution to other value and revert back then fps back to normal again. Sometimes restarting the game also help. And i got the same problem with Counter-Strike 2.

Steps for reproducing this issue:

1. Launch dota
2. Play online matches or hero demo mode
3. Watch at fps counter
4. If fps in normal range then try to change video renderer options or game resolution and fps drop