By default it appears there is mouse acceleration on the horizontal axis, which can be disabled by editing SkyrimPrefs.ini

I also disabled vsync by adding iPresentInterval=0 in Skyrim.ini (both configuration files are in the My Documents Skyrim folder)

* I noticed the vertical axis mouse speed varies GREATLY depending on the frame rate you're getting. If you are looking at a wall, and get a framerate of 200, the speed for vertical mouse movement becomes insanely fast. On the other hand, if you're getting a low framerate like 30 FPS, it slows down.

* There is noticeable input lag with mouse movement, even with vsync off and 60+ FPS. Though this is probably just due to the game engine... I know Deus Ex: HR had a lot of post-processing graphical effects that when enabled added input delay.

Hopefully a patch address the changing vertical sensitivity depending on framerate...

Bump.

Anyone else have the vertical speed issue?

Turn off "Xbox Controller" in your settings.

i have disabled the xbox controller in the .ini and set bMouseAcceleration= to 0. i have toggled iPresentInterval= between 1 and 0 and i still have mouse acceleration, and i still have uneven X and Y axis movement.

This becomes really bothersome really quickly.

I have the same exact problem. I have the controller disabled in the settings, mouse acceleration off, and vsync is forced off in the nvidia control panel.

I think accel is only enabled for x-axis movement by default. Disabling it made the x-y speeds much closer to each other to the point where I can't tell if they're different.

I'm more concerned with how y-axis speed changes depending on the frame rate you're getting...

Me too. I usually get a frame rate between 40-60 but it is very difficult to play when the y-axis moves at warp speed when the frame rate is in the triple digits.

Noticed that too (higher vertical sens at high framerates). Very very odd.

I too am having issues with the mouse, who knows. I am giving up and just using the 360 controller. The UI and everything feels really good with a controller at least

Just wish we had actually gotten the PC UI and controls promised.

In the SkyrimPrefs.ini make sure the fMouseHeadingSensitivity is set to a number close to 1.000

My default was like 0.0125 or something and it made it so awkward to play with.

That is just the mouse sensitivity, and with that set to 1.000 a slight twitch of my hand makes my character spin...and that is with my DPI setting set to a paltry 1200DPI.

I'm having mouse input lag as well as soon as I reach the outside levels. I really, REALLY, DO NOT want to be forced to use a controller. That's WHY I bought the PC version, for the accuracy of a mouse for aiming (that and for what I thought would be far better performance). Even though I grew up aiming at stuff with console controllers, after all these years of playing PC games I now aim horribly with a controller when playing games like this.

I Highly Doubt it's my hardware as I have a decently beefy power gaming rig. Granted I'm only running one graphics card because I put my other one in my wife's machine, but even without dual cards (GeForce GTX 560 Ti 2 gig card) I should be running this on High or Ultra with No Problems. It ran smooth as glass until I made it outside for the first time. As soon as I was under open sky trying to use mouse-look, looking up and down became slow as hell. I haven't tried checking my FPS (since I don't know the hotkey to show it anymore) but I suspect my frame-rate is plummeting when I step outside for some reason. My first attempt launching the game failed, had everything on Ultra but I tweaked a few things a little lower just to lessen system stress (minor stuff like grass draw distance, nothing major that would impact my immersion). How come I can find Youtube videos of PC gameplay and it's smooth as glass (and their system specs posted in the videos are FAR below mine) and yet I seem to be lagging on my end?

My Coder Sense in Tingling (it's like Spidey Sense except it fishes out buggy or slopy code) and that can only mean that someone, somewhere, screwed the pooch and did a rush job on coding mouse movement input speeds to the point where no matter what the user changes it runs slow in big outdoor areas. Not good for a day one release in my humble opinion.

I'm too tired now to mess around with tweaking stuff and shutting down other processes on my rig to see if it helps any, it's 5 A.M. and I need to crash. Tomorrow however I'm going to try to change stuff on my system and in the game's .ini files to squeez out some more performance but I doubt it will be much though as the programs I run in the background have practically non-existant memory footprints. I can't understand why the game is acting this poorly when my rig is FAR beyond even the reccomended requirements. I run EVERYTHING else I play on ULTRA with ZERO slow down or bad performance. The games I run on ULTRA include Shogun 2 TW, Fallout 3 of course, Crysis 2, Red Faction Armageddon, Deus Ex Human Revolution, Call of Duty - Black Ops, and more than a few other brand new titles. All of them run Smooth As Glass yet this is giving me issues? Something smells foul in Denmark (that's a quaote from Shakespear, not a jab at Denmark btw, I love Denmark).

I'm going to sleep momentarily. Hopefully by the time I wake up and I'm ready to (hopefully) have a great day immersed in this EPIC world, either another patch will be posted to boost performance, or there will be soome answer or workaround to improve this situation WITHOUT having to resort to trying a horrid controller to see if that helps.

Any ideas for performance tweaks that won't make the game look like total crap? My rig is barely over a year old with top of the line hardware. There's No Excuse what-so-ever for how shoddy this has run in outdoor envoriments. I also haven't tried to actually get back into game yet as I fear it won't work. It was hell trying to get it t run in the first place. It took 3 tries before I even got in game to actually play and even then I wasn't sure if was going to actually work and get me in game the time I got started (the two times before that I had a black screen of death and a white screen of death.). Perhaps it's something as simple as poor optimzation for the PC version, even though I don't see how Bethesda could let something like that slip by in QA testing.

Can we get a hotfix or patch for these issues PLEASE Bethesda?

Oh, the one time I actually got in game, at first I had what I thought was the black screen of death. I switched to task manager and it said it was running. So, I brought it back up, but then I had to let my dog outside. I went to the bathroom my-self, then let my dog back inside, and then when I sat down in front of my PC expecting to have to terminate the Skyrim proccess when it suddenly changes and finishes loading me into the game even though the load screen finished and then vanished At Least ten minutes before that, maybe even fifteen minutes before. Was it having some insanely hard loading issue that wasn't obvious? No clue, but Bethesda, PLEASE, don't let your loyal and dedicated PC gamer base down. Also, if you could make the picking up stuff buttons more like Fallout 3's that would be amazingly cool. I keep pressing keyboard buttons like I'm playing FO3 and expecting them to be the same since the PC controlls for that game were Spot On. I KNOW you guys can fix this right as you've done it before in other games. Please help us lowly PC gamers with $2,000 gaming machines out.

I don't know whether to start another thread but it seems related to this as well.

The "selection box" around the item text in some menus (for example in the inventory) is shifted slightly to the right.

In other words, if you click on the first letter of an inventory item instead of the middle of the word it "misses" and closes the menu.

Yes I get this as well, but only for "categories," such as on the words "apparel," "weapons," etc.It doesn't seem to happen for items.