After upgrading x11-drivers/xf86-input-evdev to 2.7.0, emulateWheel stopped working in the vertical direction with a Kensington Expert Mouse (it's actually a trackball).
Horizontal scrolling still works, as does the actual mouse wheel on the device.
xev does not show any input at all when trying to scroll with the emulated wheel.
Installing 2.6.0 and restarting X fixes the problem.
Steps to Reproduce:
1. Upgrade to x11-drivers/xf86-input-evdev
2. Restart X or reboot
3. Try to scroll using the emulated mouse wheel.
No input events are sent to applications.
Scrolling works as usual.
Too long, will be attached.
Created attachment 318900 [details]
cave info x11-drivers/xf86-input-evdev
Created attachment 318902 [details]
Created attachment 318904 [details]
Can you check whether xf86-input-evdev-9999 from the x11 overlay is also affected, and if yes report this upstream at https://bugs.freedesktop.org/ too?
The error still occurs with xf86-input-evdev-9999, I'll report this upstream.
I'm seeing the same thing. Downgrading to xf86-input-evdev 2.6.0 or xorg-server 1.12.2 will eliminate the issue.
Submitted to upstream at https://bugs.freedesktop.org/show_bug.cgi?id=52508
This was fixed in xorg-server-1.13.0.