Red Hat Bugzilla – Bug 426865
Synaptics touchpad stops working intermittently
Last modified: 2008-06-16 22:57:35 EDT
Description of problem: At times the synaptics touchpad on my Dell Inspiron 8600
stops working. The pointer will freeze on the screen for 20 to 30 seconds and
then will start working again for a few seconds. The problem usually goes away
if I unplug the AC power and run on the battery. The problem usually returns
when the AC power is connected again. An external PS/2 or USB mouse works
normally, only the touchpad exhibits the problem. I've been running Fedora 7 on
this laptop since it was released and the problem only began within the last
week. I install Fedora updates as they are released, so I'm guessing one of the
recent updates broke something in kernel ACPI support or in the synaptics driver.
Version-Release number of selected component (if applicable):
How reproducible: Often but not always reproducible when run on AC power. Very
rarely running on battery power.
Steps to Reproduce:
1. Connect AC power
2. Boot laptop
3. Try to use touchpad
Pointer alternately freezes and then works for a few seconds at a time
Touchpad should move the pointer normally
I've cleaned the touchpad, checked the physical wiring, tried the Dell pointer
diagnostics, swapped to an alternate HD with Windows XP. All indications are
that the touchpad hardware is working normally. The problem seems to be
something that changed in Fedora with a recent update.
If other information about the hardware or software is needed, let me know what
would be helpful.
Update: Based on suggestions I found from online searches, I tried booting with
"noacpi acpi=off pci=noacpi noapic nolapci lapci=off" but this had no effect on
On the remote chance that this is a hardware problem I called Dell support. A
tech arrived today and replaced the palm rest and touchpad on the laptop. This
had no effect on the problem. He arranged to have a new motherboard sent out and
we'll try swapping that out when it arrives in a few days. I'll post an update
once I know the results.
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