You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
ValveTime.co.uk | Valve News, Forums, Steam
Well - this is my first post, but seaching the forums, this issue didn't seem to come up much.
I found that the mouse input (looking around etc.) was VERY jerky in HL2. At first I thought it must be just a framerate problem but after a lot of testing I realized that it was how HL2 was processing my mouse input. I'm a pretty hardcore FPS gamer, and have never seen this problem as bad before. I did see "jerky" input referred to a few time in reviews, but nobody had any fixes suggested.
Symptom: No matter if m_filter was on or off, or even playing with the sensitivity, looking around, especially small moves were very jerky. As a test, I bound the turn verbs to keys and turning via the keyboard was butter smooth. I also enabled the joystick and set it to look mode (I can never imagine actually playing that way!) and again turning was butter.
I then started digging into the config variable and through a bunch of testing found that by turning sensitivity way up, turning m_pitch and m_yaw way down, and then tweaking the mouse acceleration, I transformed my mouse input to be basically as smooth as any other game.
The difference for me is night and day. Anyway - hope that might help anyone else who might be having similar problems.
BTW - my specs - not that they had much impact on this particular item: P4 2.8, 1 GB, ATI 9800Pro etc....
Edit:
PS. if you are running Logitech's mouseware drivers, make sure you "Disable acceleration in games" in the properties under motion or it will really mess with things....