Just read this on steam forums hope it will fix some of your problems

how to disable fps cap, remove mouse lag, and turn off start movies
disable fps cap and remove mouse lag:

1) close the game

2) go to ..\My Documents\My Games\HOMEFRONT\GCGame\Config

3) open GCEngine.ini

4) find and edit:

Quote:
bSmoothFrameRate=false
Quote:
UseVsync=false
Quote:
UseFPSSmoothing=false
5) save and close GCEngine.ini

6) open GCInput.ini

7) find and edit:

Quote:
bEnableMouseSmoothing=false
8) save and close GCInput.ini

9) load the game, click options, click system, check and uncheck v sync, click apply (this forces the game to read the updated configs)

turn off start movies:

1) close the game

2) go to ..\My Documents\My Games\HOMEFRONT\GCGame\Config

3) open GCEngine.ini

4) find and edit:

Quote:
bShouldStopMovieAtEndOfLoadMap=true
;+StartupMovies=LegalScreen_PC
;+StartupMovies=THQ
;+StartupMovies=ThreeLogos
;+StartupMovies=DE_Logo
;+StartupMovies=NVidia
;+StartupMovies=HomeIsLogo
5) save and close GCEngine.ini

that's it!

if any of the above steps don't work for you, i suggest you start clean by deleting the auto-generated user configs and editing the master default configs. here's how:

delete user configs:

1) close the game

2) go to ..\My Documents\My Games\HOMEFRONT\GCGame\Config

3) delete GCEngine.ini and GCInput.ini (WARNING: this will erase all of your current Homefront settings)

disable fps cap and remove mouse lag:

1) close the game

2) go to ..\Steam\steamapps\common\homefront\Engine\Config

3) open BaseEngine.ini

4) find and edit:

Quote:
bSmoothFrameRate=false
Quote:
UseVsync=false
Quote:
UseFPSSmoothing=false
5) save and close BaseEngine.ini

6) open BaseInput.ini

7) find and edit:

Quote:
bEnableMouseSmoothing=false
8) save and close BaseInput.ini

9) load the game, click options, click system, check and uncheck v sync, click apply

turn off start movies:

1) close the game

2) go to ..\Steam\steamapps\common\homefront\GCGame\Config

3) open DefaultEngine.ini

4) find and edit:

Quote:
bShouldStopMovieAtEndOfLoadMap=true
;+StartupMovies=LegalScreen_PC
;+StartupMovies=THQ
;+StartupMovies=ThreeLogos
;+StartupMovies=DE_Logo
;+StartupMovies=NVidia
;+StartupMovies=HomeIsLogo

I don't know they fixed the patch but i solved my mouse lag problem :P