mouse lag in video games since updating to win 8.1

After doing some testing in CSGO (I did a fresh reinstall and it's currently the only installed game I have). I'm rather baffled at how severe the issue is.

m_rawinput 1 (enabling rawinput through the game's console) ---> OK

m_rawinput 0 (disabling rawinput through the game's console) ---> NOK

Without rawinput I get massive amounts of negative acceleration (yes I'm aware that WM_MOUSEMOVE/GetCursorPos can already cause this, but the values used were OK in this aspect PRE win 8.1) and sometimes a weird spike of positive acceleration. This is with both "Enhance Pointer Precision" ticked on/off.

Please be adviced that most gamers prefer "Enhance Pointer Precision" ticked off (linear acceleration curve).

Hardware used to test:

Core i7 2600k

Gigabyte P67-UD4 b3

Corsair 8GB Vengeance 1600 Mhz

Samsung 840 Pro 512GB

Mice: Zowie FK, tested on both 2300 and 1150 dpi

         Razer Deathadder Black Edition, tested on 900 and 1800 dpi

         Steelseries Sensei, tested on a wide variety of dpi's (can be set in steps of 90)

CSGO was also not reinstalled, my games are on a steam library on a different partition, nor did CSGO receive any update or change (usually happens on thursdays for me).

The workaround (compatibility mode) did not solve the issue either.

I'm pretty sure they overlooked something when they implemented this:

http://blogs.windows.com/windows/b/extremewindows/archive/2013/07/15/windows-8-1-dpi-scaling-enhancements.aspx

From Mark Cranness blog:

"In Windows 7, mouse pointer movement is scaled according to DPI. For a given on-mouse-pad mouse movement, larger DPI settings cause larger on-screen pointer movement.

An internal calculation includes a factor '* DPI'."

Source:

http://donewmouseaccel.blogspot.be/2010/02/windows-mouse-pointer-acceleration_28.html

Considering from what I have seen in CSGO this issue is rather severe. Thank god CSGO has rawinput, because any game that doesn't have rawinput is currently severely impaired.

That is good info; although this is going to be a tough one with other people reporting no issues even with similar HW configs.

i'll check CS GO even though I think if the issue is present it would have affected my other games by now.

Don't know about WOW, but both Portal and CSGO support rawinput so if you have this turned ON, you shouldn't be having an issue.

I just toggled rawinput on/off in CSGO for testing purposes and the difference was huge. Normal behavior with rawinput ON and completely messed up with rawinput OFF.

Before Windows 8.1, on Windows 8(.0) rawinput 0 and 1 were almost exactly the same, except for mayble some negative acceleration on very low sensitivities combined with high dpi's (sensitivity 0.25 and 5400 dpi for example), which is to be expected using WM_MOUSEMOVE.

Now for these games we can work with it, but there's still plenty of games out there that do not support raw input and this behavior is unacceptable.

@Wagnard I'll test DPCLAT.

I'm not hitting an issue. I've played Portal, WOW and CSGO. Not seeing any lag on my end.

Intel Core i7

Radeon 7970

I have the steelseries Sensei and the Razer Naga

I wonder why i'm not hitting this.

2 workarounds I have for this is to run the program DPCLAT  or Google chrome in the background.

I know it sound completely unrelated but trust me, somehow it does the job.

@Microsoft, slap your engineer. how could this have gone to RTM even after reports on Preview...

We see here Microsoft is not really thinking of gaming with PCs.