Red Hat Bugzilla – Bug 124457
USB mouse attached during boot prevents detection of touchpad
Last modified: 2015-01-04 17:06:27 EST
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Description of problem:
Fresh FC2 install on a Sony PGC-Z1XSP which comes with an Alps touchpad.
If I boot without a USB mouse attached the touchpad and keyboard are
kernel: serio: i8042 AUX port at 0x60,0x64 irq 12
kernel: input: PS/2 Generic Mouse on isa0060/serio1
kernel: serio: i8042 KBD port at 0x60,0x64 irq 1
kernel: input: AT Translated Set 2 keyboard on isa0060/serio0
But if I boot with a USB mouse attached then the touchpad isn't detected
(only the last two of the above lines appear in /var/log/messages) and
nothing I can think of will bring it to life.
OTOH, attaching the USB mouse _after_ boot works just fine: X responds
to both the touchpad and the mouse via /dev/input/mice.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Attach USB mouse to laptop with Alps touchpad
Actual Results: Only USB mouse is detected on boot
Expected Results: Both touchpad and USB mouse detected
I'm *guessing* your bios turns the touchpad off at boot if a USB mouse
is detected. Are there any options in your BIOS about this?
No there aren't.
Is there any other information I can give you?
/proc/bus/input/devices doesn't list the touchpad, presumably, if you
boot with a USB mouse?
Does fiddling with psmouse.proto=<bare|imps|exps> on the kernel
command line help at all?
Created attachment 100604 [details]
/dev/input/devices with and without USB mouse attached on boot
/proc/bus/input/devices with and without USB mouse attached. The
detection of the jog dial in the without case seems a bit stranged
because this machine doesn't have a jog dial.
Fiddling with psmouse.proto doesn't help.
Assigning to kernel... if it's not showing up there, not much kudzu
can do. Does this work with earlier releases?
It's a new machine and hasn't had any earlier releases on it.
Please try the patch mentioned in the following link or,
alternatively, try loading all your USB stuff before loading psmouse
psmouse is built in...
Thanks for that link ... unfortunately I'm not going to have time to
build a custom kernel for a week or so.
FWIW, the earlier thread here,
appears to describe my problem exactly, including the Sony BIOS
limitations. Given that psmouse is non-modular in the stock FC2 kernel
I can't try the workaround of playing with module load order that's
Just like to report that this problem appears to be fixed with test
Fedora Core 2 has now reached end of life, and no further updates will be
provided by Red Hat. The Fedora legacy project will be producing further kernel
updates for security problems only.
If this bug has not been fixed in the latest Fedora Core 2 update kernel, please
try to reproduce it under Fedora Core 3, and reopen if necessary, changing the
product version accordingly.