Re: [linux-pm] "i8042: Can't reactivate AUX port" after s2ram on 3.4-rc2

[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@xxxxxxxxx>
> 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?

Rafael
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/