input delay.... holy F***

[curtisbouvier]

I'm really curious if anybody has ever found out why particular LCD screens have horrific input delay?

I have a Samsung 215TW from 2006, which is 8MS, 1680x1050 res.

its the best screen I've ever seen as far as clarity, color, viewing angles go.

but some games have incredibly horrible input delay, as much as 60ms, all the way up to a second.

why is it that Clicking the mouse and pushing buttons on the keyboard are 8MS,, but the mouse movement ALONE varies....., going from 8ms all the way up to a second?

I've tried different mice, I've tried other cables, I've tried other monitors, CRT's, etc.

CRT's are 100% instant from what I can see... With this delay issue, you can feel it more than you can see it...

how does the monitor know the difference between a movement signal and a clicking signal?

some games, like ghost recon, rainbow six, have just an incredible 1 second movement delay, which is completely unplayable. but yet when I click the left mouse button the sound / muzzle flash coming from the gun is 8ms later...

this is Really odd. does anybody know anything about this?

[Freezer7Pro]

Could it be that it's connecting through DVI? If CRTs work, that could be the issue. Have you tried with another graphics card?

[curtisbouvier]

I used the same DVI port and cable, simply with a vga adapter to a crt, and the delay was gone.

then I plugged that same cable setup into the VGA input on my lcd, the delay was minimized by a small amount, (not by much tho)

the delay became more noticeable when using strictly just DVI cable / input.

I don't understand, is the monitor in charge of my mouse movement? or is the computer?

You'd think all mouse movement, all input signals Period,, are all pre-rendered in the computer, and the signal is simply sent out..

there is No way an LCD screen or any type of screen should be able to effect or change the signal it is receiving, at least not a specific portion of it...

i could understand ALL or None... but not a portion of it.

doesn't make any sense whats so ever!! :bang head

[nd4spdbh2]

Input lag does not change will the application running.. it is caused by the need to process the input video signal and and send the correct pixels the correct information.

You will notice more input lag if there are large changes on the screen or "fast moving stuff"

I did a test a while back with a good CRT and my samsung 52inch lcd hdtv with a rated 8MS White to Black responce time... it averaged ~ 38.8MS difference so figure 30ms input lag time, which is just the processing time essientally.

http://teamlosi.andrevas.net/pics/excell.JPG

Crt left hdtv right
http://teamlosi.andrevas.net/pics/timer%20013%20(Large).jpg

Either way it sounds like ur monitor is messin with ya, does it do the same thing with another monitor?

[curtisbouvier]

I've tried a CRT, which completely solves the problem.

but we don't have any other lcd's in the house to try unfortunately.

I've heard that ATI might be a small part of the problem too.

they alt tab really slow, they have really odd ways of doing things in there drivers apparently, video play back is flakey.

guess will have to see when I get my new computer in a month

[dogbert_2001]

Mouse lag in games is caused by your video card. It's processing more than it can handle. Lower your graphics settings. Some games have an option to reduce mouse lag.

Input lag is the time it takes for change from either user input or the video card to show up on the monitor. This is affected by hardware, specifically, the display processor inside the monitor.

[doublejack]

Mouse lag in games is caused by your video card. It's processing more than it can handle. Lower your graphics settings. Some games have an option to reduce mouse lag.

Input lag is the time it takes for change from either user input or the video card to show up on the monitor. This is affected by hardware, specifically, the display processor inside the monitor.

This sounds a lot more like input lag than mouse lag. The OP says that going to a CRT solves the problem, ergo this is likely just input lag from the LCD monitor. Unfortunately, some LCD's just don't make good gaming monitors.

[nightelph]

I believe that 215TW is a MVA or PVA (either way, not a TN) panel. I've read that these higher quality panels have higher input lag times inherently. Mine certainly does.

[MoreGooder]

LCD Monitors with scalar units in them (chips that automatically adjust image resolution to fill the screen even if not native res) typically require more processing time prior to displaying the image. Make sure your running at native res at least. But, by what I've been able to gather, the scalar chip is still playing a roll even if native res is used, and will still cause a large lag.

[silencer51]

In MVA/PVA panels, the Overdrive circuit is to blame for high input lag, from what I've read online...