Re: [PATCH] Reset ps/2 port should psmouse_probe fail before retrying

["Peter M. Petrakis" <peter.petrakis@canonical.com>]

Dmitry,

This Dell in question do not have an option to disable the
touchpad. The BIOS options are unremarkable.

Peter

On 04/28/2010 01:07 PM, Dmitry Torokhov wrote:
> On Fri, Apr 23, 2010 at 02:46:52PM -0400, Peter M. Petrakis wrote:
>> Here are the dmesg boot logs with i8042.debug. 
>>
>> On 04/23/2010 12:53 PM, Dmitry Torokhov wrote:
>>> On Thursday 22 April 2010 05:47:48 pm Christoph Fritz wrote:
>>>> Am Donnerstag, den 22.04.2010, 14:55 -0700 schrieb Dmitry Torokhov:
>>>>> On Thu, Apr 22, 2010 at 05:48:21PM -0400, Peter M. Petrakis wrote:
>>>>>> Hi,
>>>>>>
>>>>>> This one is a winner. with regards to your follow up. I wouldn't
>>>>>> want to reset something unless we have cause to. This code
>>>>>> seems to be doing the right thing e.g. I see "unable to query
>>>>>> synaptics hardware" followed by it's (re)discovery on return
>>>>>> from S3.
>>>>>>
>>>>>> When it's fully supported by the Synaptics driver, the initial
>>>>>> reconnect will succeed and we'll never get to this additional
>>>>>> failsafe code which is essentially a catch all for the bleeding
>>>>>> edge.
>>>>>
>>>>> I am confused here... what protocol does the kernel select upon fresh
>>>>> boot?
>>>>
>>>> Peter's dmesg:
>>>>
>>>> [    7.428561] Unable to query Synaptics hardware.
>>>>
>>>>  It's plain PS/2 or IMPS/2 because this bleeding edge device fails
>>>> somewehre in synaptics_query_hardware(). Most likely the test on
>>>> priv->identity.
>>>
>>> Ah, I missed that. Peter, could you boot with i8042.debug so we could see 
>>> where exactly Synaptics detection fails?
>>>
> 
> Indeed, capability request returns "d0 00 73" whereas we expect 0x47 in
> the middle byte.
> 
> Peter, please make sure that you do not have touchpad disabled in BIOS
> (at least other Dells that I seen had similar options).
> 
> Cristofer, do you know by any chance why touchpad reporing firmware 7.5
> would return such unexpected answer to 0x02 query?
> 
> Thanks!
>