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 [off-list ref]
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