Comment 3 for bug 367932

Is there any way to get more debug information from evdev?

Here are the relevant sections from Xorg.0.log from first an Ubuntu 8.10 machine, where the mouse works properly, and then 9.04 where the mmb has problems:

8.10:

(II) config/hal: Adding input device Logitech USB Receiver
(**) Logitech USB Receiver: always reports core events
(**) Logitech USB Receiver: Device: "/dev/input/event6"
(II) Logitech USB Receiver: Found x and y relative axes
(II) Logitech USB Receiver: Found 16 mouse buttons
(II) Logitech USB Receiver: Configuring as mouse
(II) XINPUT: Adding extended input device "Logitech USB Receiver" (type: MOUSE)
(**) Logitech USB Receiver: YAxisMapping: buttons 4 and 5
(**) Logitech USB Receiver: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
(II) config/hal: Adding input device Logitech USB Receiver
(**) Logitech USB Receiver: always reports core events
(**) Logitech USB Receiver: Device: "/dev/input/event7"
(II) Logitech USB Receiver: Found 1 mouse buttons
(II) Logitech USB Receiver: Found keys
(II) Logitech USB Receiver: Configuring as keyboard
(II) XINPUT: Adding extended input device "Logitech USB Receiver" (type: KEYBOARD)
(**) Option "xkb_rules" "evdev"
(**) Logitech USB Receiver: xkb_rules: "evdev"
(**) Option "xkb_model" "pc105"
(**) Logitech USB Receiver: xkb_model: "pc105"
(**) Option "xkb_layout" "se"
(**) Logitech USB Receiver: xkb_layout: "se"
(**) Logitech USB Receiver: YAxisMapping: buttons 4 and 5
(**) Logitech USB Receiver: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200

9.04

(II) config/hal: Adding input device Logitech USB Receiver
(**) Logitech USB Receiver: always reports core events
(**) Logitech USB Receiver: Device: "/dev/input/event4"
(II) Logitech USB Receiver: Found 16 mouse buttons
(II) Logitech USB Receiver: Found x and y relative axes
(II) Logitech USB Receiver: Configuring as mouse
(**) Logitech USB Receiver: YAxisMapping: buttons 4 and 5
(**) Logitech USB Receiver: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
(II) XINPUT: Adding extended input device "Logitech USB Receiver" (type: MOUSE)
(**) Logitech USB Receiver: (accel) keeping acceleration scheme 1
(**) Logitech USB Receiver: (accel) filter chain progression: 2.00
(**) Logitech USB Receiver: (accel) filter stage 0: 20.00 ms
(**) Logitech USB Receiver: (accel) set acceleration profile 0
(II) config/hal: Adding input device Logitech USB Receiver
(**) Logitech USB Receiver: always reports core events
(**) Logitech USB Receiver: Device: "/dev/input/event5"
(II) Logitech USB Receiver: Found 1 mouse buttons
(II) Logitech USB Receiver: Found keys
(II) Logitech USB Receiver: Configuring as keyboard
(**) Logitech USB Receiver: YAxisMapping: buttons 4 and 5
(**) Logitech USB Receiver: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
(II) XINPUT: Adding extended input device "Logitech USB Receiver" (type: KEYBOARD)
(**) Option "xkb_rules" "evdev"
(**) Logitech USB Receiver: xkb_rules: "evdev"
(**) Option "xkb_model" "pc105"
(**) Logitech USB Receiver: xkb_model: "pc105"
(**) Option "xkb_layout" "se"
(**) Logitech USB Receiver: xkb_layout: "se"

The only difference I can see is the "(accel)" section. What does it do?