input event/mouse detection from evdev/x server

[Popescu, CatalinX]

Hi,

I have an issue with the X server, evdev library more precisely. When a mouse (or a compatible device) is detected by the X server, the server does actually detect an event device (/dev/input/eventN) and a mouse device (/dev/input/mouseN). On the event device detection is successful, but the mouse detection fails because of the EVIOCGNAME ioctl failing. As a result the evdev module gets unloaded. Depending on which detection happens in first place the mouse will/won't work :
- if the mouse device gets detected first the mouse will work
- if the mouse device gets detected after the event device the evdev module will get unloaded and the mouse won't work

See below the /var/log/Xorg.0.log :

[    18.672] (II) config/udev: Adding input device Logitech USB-PS/2 Optical
Mouse (/dev/input/event2)
[    18.672] (**) Logitech USB-PS/2 Optical Mouse: Applying InputClass
"default"
[    18.672] (II) LoadModule: "evdev"
[    18.675] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[    18.676] (II) Module evdev: vendor="X.Org Foundation"
[    18.677]    compiled for 1.9.0, module version = 2.4.99
[    18.677]    Module class: X.Org XInput Driver
[    18.677]    ABI class: X.Org XInput driver, version 11.0
[    18.678] (**) Logitech USB-PS/2 Optical Mouse: always reports core events
[    18.678] (**) Logitech USB-PS/2 Optical Mouse: Device: "/dev/input/event2"
[    18.683] (--) Logitech USB-PS/2 Optical Mouse: Found 3 mouse buttons
[    18.683] (--) Logitech USB-PS/2 Optical Mouse: Found scroll wheel(s)
[    18.683] (--) Logitech USB-PS/2 Optical Mouse: Found relative axes
[    18.683] (--) Logitech USB-PS/2 Optical Mouse: Found x and y relative axes
[    18.684] (II) Logitech USB-PS/2 Optical Mouse: Configuring as mouse
[    18.684] (**) Logitech USB-PS/2 Optical Mouse: YAxisMapping: buttons 4 and
5
[    18.684] (**) Logitech USB-PS/2 Optical Mouse: EmulateWheelButton: 4,
EmulateWheelInertia: 10, EmulateWheelTimeo0
[    18.684] (II) XINPUT: Adding extended input device "Logitech USB-PS/2
Optical Mouse" (type: MOUSE)
[    18.685] (**) Logitech USB-PS/2 Optical Mouse: (accel) keeping acceleration
scheme 1
[    18.685] (**) Logitech USB-PS/2 Optical Mouse: (accel) acceleration profile
0
[    18.685] (**) Logitech USB-PS/2 Optical Mouse: (accel) acceleration factor:
2.000
[    18.685] (**) Logitech USB-PS/2 Optical Mouse: (accel) acceleration
threshold: 4
[    18.685] (II) Logitech USB-PS/2 Optical Mouse: initialized for relative
axes.
[    18.690] (II) config/udev: Adding input device Logitech USB-PS/2 Optical
Mouse (/dev/input/mouse0)
[    18.691] (**) Logitech USB-PS/2 Optical Mouse: Applying InputClass
"default"
[    18.691] (**) Logitech USB-PS/2 Optical Mouse: always reports core events
[    18.691] (**) Logitech USB-PS/2 Optical Mouse: Device: "/dev/input/mouse0"
[    18.695] (EE) ioctl EVIOCGNAME failed: Inappropriate ioctl for device
[    18.707] (II) UnloadModule: "evdev"


Can someone explain why there are 2 input "devices" detected by X server for one physical mouse? How can this be fixed? Is it an issue with the evdev kernel driver or an issue with X server/evdev extension?

Thanks.
-catalin

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