linux-kernel - Re: appletouch quirk doesn't run at resume

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Message-ID: <4609866C.4060602@m3y3r.de>
Date:	Tue, 27 Mar 2007 23:02:36 +0200
From:	Thomas Meyer <thomas@...3r.de>
To:	Jiri Kosina <jkosina@...e.cz>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Adrian Bunk <bunk@...sta.de>,
	Soeren Sonnenburg <kernel@....de>,
	linux-input@...ey.karlin.mff.cuni.cz
Subject: Re: appletouch quirk doesn't run at resume

Jiri Kosina schrieb:
> On Sun, 18 Mar 2007, Thomas Meyer wrote:
>
>   
>> Appletouch is bound to the device:
>>     
>
> OK, so the quirk actually works fine ...
>   
Yes, it works fine, but...
>   
>> But the X server touchpad driver doesn't work anymore, that means i 
>> can't emulte a right click by tapping with 3 fingers on the mouse pad. 
>> after restarting x the mouse driver works again. So i think this is 
>> maybe a problem in X?
>>     
>
> ... but there is something apparently wrong either with the appletouch 
> driver or X. Could you test via evtest whether the events are properly 
> generated by the kernel? If they do, I'd say it is almost certainly X bug.
>   

It seems, that after the resume all usb devices gets removed and plug in
again (virtually!). This results in a new input device name:

before suspend and resume:

appletouch Geyser 3 inited.
input: appletouch as /class/input/input2

after resume:
Restarting tasks ... <6>usb 1-2: USB disconnect, address 3
PM: Removing info for No Bus:usbdev1.3_ep83
PM: Removing info for usb:1-2:1.0
PM: Removing info for No Bus:usbdev1.3_ep81
input: appletouch disconnected
[cut]
PM: Adding info for No Bus:usbdev1.4_ep83
PM: Adding info for usb:1-2:1.1
appletouch Geyser 3 inited.
input: appletouch as /class/input/input15

This change confuses the X synaptics driver:

Touchpad no synaptics event device found (checked 11 nodes)
Touchpad The /dev/input/event* device nodes seem to be missing
(EE) xf86OpenSerial: Cannot open device /dev/input/event2
        No such file or directory.
(WW) Touchpad: cannot open input device

And so X falls back to my second pointer device which is a UsbMouse
under /dev/input/mice

One could say that the synaptics driver rightly complains about the
missing event2 device!
So is this a bug in the X synaptics driver?

Comments are welcome.

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