I regularly switch between Arch and Windows 7, so I have a fair bit of recent play time on both platforms. I personally don't notice any differences between them, they perform similarly.
OS: Arch Linux
Kernel: x86_64 Linux 4.4.6-1-ck
Resolution: 3840x1080
DE: XFCE4
WM: Xfwm4
CPU: Intel Core i5-3570K CPU @ 3.8GHz
GPU: GeForce GTX 760 361.28
RAM: 7875MiB
I use the ck patched kernel and proprietary NVIDIA drivers. I set CPU policy to SCHED_ISO when running TF2, and the CPU governor to Performance. I use an unaltered cowmanglia's gfx.cfg and run the game at 1920x1080.
Running this "benchmark demo" gives me the following:
2639 frames 18.378 seconds 143.60 fps ( 6.96 ms/f) 11.731 fps variability
Windows with same cfg for comparison
2639 frames 19.202 seconds 137.44 fps ( 7.28 ms/f) 10.304 fps variability # dxlevel 95
2639 frames 19.222 seconds 137.29 fps ( 7.28 ms/f) 10.262 fps variability # dxlevel 90
2639 frames 16.815 seconds 156.95 fps ( 6.37 ms/f) 11.132 fps variability # dxlevel 81
CHERRYbastia question for you linux users than if i got this thread here already.
if you played on winows before that do you notice any differences in mouse speed? even when i was 100% sure that my drivers were working correctly, my mouse felt about 1.5 times as fast even on desktop while not ingame.
There's no raw input afaik and some distros have mouse acceleration so this would be my bet
There is raw input, it's simply bugged. TF2 has a bugged version of a library that doubles the raw sensitivity. Using half your Windows sensitivity should be identical.
Disabling mouse acceleration is always good though.