The trackpad mouse speed is very fast

[Kangz]

Since librocket has been merged the trackpad speed has been very fast on my computer.

OS: Archlinux 64bits (Gnome3)
Trackpad: SynPS/2 Synaptics TouchPad (from Xorg.log)
SDL2
Fullscreen and windowed

Last time I debugged, the events from SDL2 themselves seemed to be really large values, meaning the problem might be in SDL2.

[Viech]

In case the speed only doubled, that is a known side effect of the move to SDL2, given a regular mouse. Halving sensitivity restored the habitual mouse speed for me back then.

[DolceTriade]

The issue is that it didn't happen pre-libRocket (so still with SDL2)

[cmf028]

The old system (rightly) disabled relative mouse mode when in the menus.
It might be worth investigating if the new system does that.
The old way was done with the KEYCATCH_* states.

Disabling relative mouse mode while in the menus is a good thing because then mouse motion feels much more like the interactions with the rest of the OS (mouse acceleration and all).

In regards to SDL2 affecting mouse speed, that is due to the switch to a more accurate API (mouse movement data not clamped to screen pixels) that disables OS mouse acceleration on Linux/Windows (Mac has no API to do this) for relative mouse mode (aiming).

[DolceTriade]

Define "old" system. librocket pre SDL2 used absolute coordinates for menu mouse movement, however, after SDL2 was merged and I had to rewrite librocket input code, I made it consistent with the q3 UI by using relative coordinates. (I have never seen the q3 system use absolute mouse coordinates because I don't think the engine ever sends them)

[Viech]

The issue has been confirmed by another user on the forums.

[Kangz]

I looked at the bug again, and it seems that the problem is that SDL2 doesn't look at input_absinfo::resolution which for my trackpad is 44 and 66 for ABS_X and ABS_Y. I just tried on Left 4 Dead 2 and I don't have problems in the menus nor ingame. So I think L4D2 might be using the OS cursor and recentering it in the screen all the time. I will try something like that soon.

[theharlockglitch]

I also had this issue when testing the game on a friend's machine. Same as described. Linux OS (Ubuntu 14.04). The trackpad was crazy speedy. The only way to perform was to use a external mouse.

(We all know that an actual mouse is mandatory to play, but that behaviour make my friend to think the game was broken in his pc). Just wanted to state the experience. I don't think this is a priority issue.

[Kangz]

Has been fixed by @mbasaglia's mouse improvements.