For me the mouse did lag/stutter on Linux, just wanted to share that this is what helped helped me in the end.

Generally it helped to just switch to windowed mode in the Game's settings. This might already be enough for you.

But for me that led to the lower 10 or 20 pixels not being visible because the window was larger than my desktop and was hidden by KDE's taskbar. In the end I changed the config file (located at "~/.local/share/ags/Lamplight City/acsetup.cfg") to set screen_def to "explicit" and define a resolution for the window manually.

I also increased the mouse speed from 1 to 1.5 because it felt very slow on my system. Don't know if that's a Linux problem as I haven't tried the Windows version yet. Just leave it at 1.000000 if you think it's fine for you.

Here is my full config:

[graphics]
render_at_screenres=0
windowed=1
screen_def=explicit
screen_width=1280
screen_height=960
[language]
translation=
[mouse]
speed=1.500000

I tried different mousepoll values, but this didn't seem to change anything.

But the latest update in the steam forums helped:

https://steamcommunity.com/app/761460/discussions/0/1742220359683704739/?ctp=3

no problem ............
it only worked partially on some resolutions: 1280 x720
full screen stays a little laggy/unresponsive.

check attachments:

lamplight_city_s.png
lamplightcity_graphics_settings.png

Hey @gamesfreak64, are you seeing this issue on Windows?
This fix is specific for the native Linux build and we have not been made aware of the issue on other platforms.
We'll have to look into it if that's the case, since it's probably caused by some other reason.

yup, then again windows is also known for 'mouse lag' or 'stutter' or whatever names it may have.......its hard to explain but moving the mouse feels unnatural, its like an invisible force is pushing \ pulling you back, if you ever tried to climb a greased obstacle you'll know what i mean, for kids they use plastic aircushions and they have to climb up, but its slippery so you will have to do your best to reach the top which is harder then it looks , i know , got lots of bumps as a kid while climing those greasy obstacles.

Another example would be like walking into a very strong wind on snow or ice :D, try walking through a puddle of mud , same effect.

You move the mouse but it resists ... on windows this is very common, even win 3.11 had some, all the way from 95 to latest versions, then again AMIGA had mouse lag aswell with certain games so thats why its usally the program that causes it.

Anyway i turned of AV and tools like that but it din't change anything, it must be in the game.

Same problem here. It almost feels like I am playing with a gamepad (and not a mouse).