Ultima attività 1723488943

Revisione f04a6653f2f41508d52f2f41afd2e83b97c6a32c

gamescope-niceness.service Raw
1[Unit]
2Description=Check gamescope niceness and set it if needed
3After=network.target
4
5[Service]
6Type=oneshot
7User=root
8ExecStart=/bin/bash -c 'if getcap $(which gamescope) | grep -q "cap_sys_nice=eip"; then exit 0; else setcap "CAP_SYS_NICE=eip" $(which gamescope); fi'
9RemainAfterExit=yes
10
11ProtectSystem=full
12ProtectHome=read-only
13PrivateTmp=true
14NoNewPrivileges=true
15
16[Install]
17WantedBy=default.target
gamescope_tips.md Raw

gamescope

Preface

I'm using endeavourOS, KDE Plasma 6.1, a RTX 3080, Wayland, and my main monitor is a Samsung Odyssey Neo G7 (3840x2160 165hz "HDR10")


Ideally, these are my launch options for each game:

gamemoderun gamescope -W 3840 -H 2160 -r 165 --hdr-enabled --hdr-itm-enable --hdr-itm-sdr-nits 300 -f -e --mangoapp -- %command%

There are some issues with it:

  • Steam overlay and input won't work (-e flag is broken)
  • --mangoapp won't show GPU and gamemode info
  • Game might freeze randomly
  • Performance is incredibly low after a while
  • -W -H -w -h -f -b don't do anything

and the workarounds...

Steam overlay and input

GitHub issue

Creating a gamescope window on the terminal and attaching the game to it will work.

First I run this on a terminal:

gamescope -W 3840 -H 2160 -r 165 --hdr-enabled --hdr-itm-enable --hdr-itm-sdr-nits 300 -f --mangoapp

Then set the game's launch options:

DISPLAY=:x gamemoderun %command%

Where x is the display number, shown on the gamescope terminal output.

The game might take a while to open up and also to completely exit, but it works just fine.

mangohud and --mangoapp

Running it as mangohud before %command% will show GPU info but not gamemode, and apparently there are issues running it this way.

I have to investigate if I have these supposed issues, and if they are related to any config about vsync and/or framerate locks on mangohud.

Game freezing

Possibly due to HDR flags but I'm not certain. Needs a reboot for the game to open again.

I haven't had this issue in a while, might've been fixed in an update, might've been something I did.

Performance

Have to set the niceness of gamescope. Run:

sudo setcap 'CAP_SYS_NICE=eip' $(which gamescope)`

It seems that after a while it loses its niceness, so I made a systemd service that runs on login

checking if the niceness is set, and setting it if it's not. Check the gamescope-niceness.service gist

Placebo flags

-W -H -w -h -f -b don't have any effect. I can freely change my resolution and fullscreen settings ingame and it'll work just fine.

Reading gamescope's readme, it mentions:

You can spoof a virtual screen with a desired resolution and refresh rate as the only thing the game sees, and control/resize the output as needed.

This can be useful in exotic display configurations like ultrawide or multi-monitor setups that involve rotation.

Probably I can run the game on a lower resolution without impacting my desktop's resolution and use the FSR flags to upscale it. Maybe I can even downscale the game?

-r seems funky though. Sometimes not setting it will lock the game to 60FPS, sometimes it has no effect at all.

There's also a flag to limit the max FPS but it doesn't do anything, or a setting on mangohud might be conflicting with both flags.