linux-kernel - Re: Input : regression

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Date:	Fri, 17 Jul 2009 12:01:33 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Dave Young <hidave.darkstar@...il.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-input@...r.kernel.org
Subject: Re: Input : regression - touchpad not detected

On Fri, 17 Jul 2009, Dave Young wrote:

> Hi,
> 
> since 2.6.31-rc3, sometimes the touchpad of my laptop will not be
> detected, usually after reboot it will be there.
> 
> I have no such problem with 2.6.31-rc2
> 
> `dmesg|grep input` with touchpad detected:
> 
> [    2.447119] input: Lid Switch as
> /devices/LNXSYSTM:00/device:00/PNP0C0D:00/input/input0
> [    2.458089] input: Power Button as
> /devices/LNXSYSTM:00/device:00/PNP0C0C:00/input/input1
> [    2.459155] input: Sleep Button as
> /devices/LNXSYSTM:00/device:00/PNP0C0E:00/input/input2
> [    3.093556] input: Video Bus as
> /devices/LNXSYSTM:00/device:00/PNP0A03:00/device:33/input/input3
> [    3.120647] input: Video Bus as
> /devices/LNXSYSTM:00/device:00/PNP0A03:00/device:3b/input/input4
> [    5.300364] input: AT Translated Set 2 keyboard as
> /devices/platform/i8042/serio0/input/input5
> [    5.669278] input: PS/2 Mouse as /devices/platform/i8042/serio1/input/input6
> [    5.698278] input: AlpsPS/2 ALPS GlidePoint as
> /devices/platform/i8042/serio1/input/input7
> 
> `dmesg|grep input` without touchpad detected:
> 
> [    2.454246] input: Lid Switch as
> /devices/LNXSYSTM:00/device:00/PNP0C0D:00/input/input0
> [    2.478038] input: Power Button as
> /devices/LNXSYSTM:00/device:00/PNP0C0C:00/input/input1
> [    2.487538] input: Sleep Button as
> /devices/LNXSYSTM:00/device:00/PNP0C0E:00/input/input2
> [    3.118063] input: Video Bus as
> /devices/LNXSYSTM:00/device:00/PNP0A03:00/device:33/input/input3
> [    3.164064] input: Video Bus as
> /devices/LNXSYSTM:00/device:00/PNP0A03:00/device:3b/input/input4
> [    5.353006] input: AT Translated Set 2 keyboard as
> /devices/platform/i8042/serio0/input/input5

Providing the dmesg output with 'i8042.debug' kernel parameter in place 
from the situation the TouchPad doesn't get detected might be helpful.

-- 
Jiri Kosina
SUSE Labs

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