Bug 433545

Description of problem:

I have an HP laptop (6519tx). The touchpad has a button on it to enable/disable
the touchpad.

The button appears to be handled purely in the hardware - there are no kernel
messages when its pushed, but the light changes between blue (enabled) and
orange (disabled). Its possible that there is some software involvement (showkey
shows it having a scancode of 192, and its software settable, since windows
restores the state to its previous state on bootup)

If I enable the trackpad and wait a few seconds before using it, the edge
scrolling continues to work fine, and the kernel usually logs:

Feb 20 09:06:33 plum kernel: psmouse.c: TouchPad at isa0060/serio1/input0 lost
synchronization, throwing 1 bytes away.
Feb 20 09:06:34 plum kernel: psmouse.c: resync failed, issuing reconnect request

However, if I start using it immediately, it takes a few seconds for movements
to work, and the kernel logs:

Feb 20 09:06:00 plum kernel: psmouse.c: TouchPad at isa0060/serio1/input0 lost
synchronization, throwing 1 bytes away.
Feb 20 09:06:02 plum kernel: psmouse.c: resync failed, issuing reconnect request
Feb 20 09:06:03 plum kernel: Synaptics Touchpad, model: 1, fw: 6.3, id: 0x1a0b1,
caps: 0xa04713/0x200000
Feb 20 09:06:03 plum kernel: input: SynPS/2 Synaptics TouchPad as
/class/input/input14
Feb 20 09:06:05 plum kernel: Synaptics Touchpad, model: 1, fw: 6.3, id: 0x1a0b1,
caps: 0xa04713/0x200000
Feb 20 09:06:05 plum kernel: input: SynPS/2 Synaptics TouchPad as
/class/input/input15

after that it mostly works fine (movements, tap for clicks), but edge scrolling
stops working. Appropriate udev events are sent:

UEVENT[1203458762.410960] remove   /class/input/input13/mouse1 (input)
UEVENT[1203458762.419955] remove   /class/input/input13/event2 (input)
UDEV  [1203458762.422232] remove   /class/input/input13/mouse1 (input)
UDEV  [1203458762.423184] remove   /class/input/input13/event2 (input)
UEVENT[1203458762.427599] remove   /class/input/input13 (input)
UDEV  [1203458762.428668] remove   /class/input/input13 (input)
UEVENT[1203458763.606245] add      /class/input/input14 (input)
UEVENT[1203458763.609958] add      /class/input/input14/mouse1 (input)
UEVENT[1203458763.619929] add      /class/input/input14/event2 (input)
UDEV  [1203458763.648451] add      /class/input/input14 (input)
UDEV  [1203458763.668146] add      /class/input/input14/mouse1 (input)
UDEV  [1203458763.679873] add      /class/input/input14/event2 (input)
UEVENT[1203458763.836628] remove   /class/input/input14/mouse1 (input)
UDEV  [1203458763.839183] remove   /class/input/input14/mouse1 (input)
UEVENT[1203458763.840620] remove   /class/input/input14/event2 (input)
UDEV  [1203458763.842870] remove   /class/input/input14/event2 (input)
UEVENT[1203458763.845144] remove   /class/input/input14 (input)
UDEV  [1203458763.847830] remove   /class/input/input14 (input)

and the /sys entries look right afterwards.

I'm not sure if this is a kernel bug, an X bug, a synaptics bug, or a hardware
issue. I suspect its both a kernel/hardware bug (shouldn't have to time out,
resync, and create a new device node) and a synaptics/X one (not handling device
plug properly)

Version-Release number of selected component (if applicable):

synaptics-0.14.4-11.fc8
xorg-x11-server-Xorg-1.3.0.0-40.fc8
kernel-2.6.23.15-137.fc8

How reproducible:
Almost always

Steps to Reproduce:
1. Enable trackpad using button
2. Immediately start using the trackpad
  
Actual results:

Have to wait a few seconds for the trackpad to work again, but edge scrolling
doesn't work until I restart X

Expected results:

Trackpad keeps working, including edge scrolling

Additional info: