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SubjectRe: [linux-pm] "i8042: Can't reactivate AUX port" after s2ram on 3.4-rc2
From: Rafael J. Wysocki:

> On Friday, April 13, 2012, Mikko Vinni wrote:
>> Bug report:
>>     https://bugzilla.kernel.org/show_bug.cgi?id=43099
>>
>> Briefly:
>>
>> After s2ram the touchpad on a HP dv5 laptop doesn't work anymore.
>>
>> dmesg contains this about the touchpad
>> Apr 11 18:00:05 koni kernel: i8042: Can't write CTR while closing AUX
> port
>> Apr 11 18:00:08 koni kernel: i8042: Can't reactivate AUX port
>>
>>
>> Full log in bugzilla with PCI and i8042 debug turned on.
>>
>> Bisected to:
>>
>> commit 26f41062f28de65e11d3cf353e52d0be73442be1
>> Author: Kay, Allen M <allen.m.kay@intel.com>
>> Date:  Thu Jan 26 10:25:53 2012 -0800
>>
>>     PCI: check for pci bar restore completion and retry
>>    
>>     On some OEM systems, pci_restore_state() is called while FLR has not
> yet
>>     completed.  As a result, PCI BAR register restore is not successful. 
> This fix
>>     reads back the restored value and compares it with saved value and
> re-tries 10
>>     times before giving up.
>
> Does reverting the above commit on top of the current Linus' tree fix the
> problem for you?


It does (at least with the tree from yesterday, 4166fb64593514ad920b7dbd290e0a934b37d24a).


Mikko

>
> Rafael
>
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