@2ffa8eb4 did you know that the Vulkan and EGL API provide means to have higher priority contexts and some graphics DRM drivers use CAP_SYS_NICE to guard that. This feature is commonly used by desktop compositors and although there were multiple attempts, we are yet to find a cleaner solution 

 @5c3ed154 CAP_SYS_NICE is wrong tool for the job. use RLIMIT_NICE instead. 

I guess we could just raise that level to all session logging in via pam_systemd, so that they maybe can acquire nice level -5 without any complications if they like 

 @5c3ed154 https://github.com/systemd/systemd/issues/29446