linux-kernel - Re: 3.12.x looses serial mouse over hibernate + resume

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Message-ID: <529CD303.4040103@netscape.net>
Date:	Mon, 02 Dec 2013 19:35:47 +0100
From:	Manuel Krause <manuelkrause@...scape.net>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	Peter Hurley <peter@...leysoftware.com>,
	linux-kernel@...r.kernel.org, Greg KH <gregkh@...uxfoundation.org>,
	linux-input@...r.kernel.org,
	linux-serial <linux-serial@...r.kernel.org>,
	Shuah Khan <shuah.kh@...sung.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: 3.12.x looses serial mouse over hibernate + resume

On 2013-12-02 17:45, Dmitry Torokhov wrote:
> On Mon, Dec 02, 2013 at 08:38:16AM -0800, Dmitry Torokhov wrote:
>> On Monday, December 02, 2013 05:08:28 PM Manuel Krause wrote:
>>> On 2013-12-01 16:43, Peter Hurley wrote:
>>>> [ +cc Dmitry Torokhov, Greg Kroah-Hartman, linux-input,
>>>> linux-serial ]
>>>>
>>>> On 11/26/2013 05:19 PM, Manuel Krause wrote:
>>>>> Since kernel 3.12.0 I have a problem with hibernate+resume
>>>>> not reactivating my serial mouse (trackball) with my HP notebook.
>>>>> Kernels 3.11.0 til 9 don't show this behaviour.
>>>>>
>>>>> Machine:           HP Notebook with Core2Duo CPU (Penryn)
>>>>> Distro:            openSUSE 12.3, 64bit, continuously updated
>>>>> Desktop:           KDE 4.11.3
>>>>> MESA & drm & Xorg: most recent ones from:
>>>>>
>>>>> http://download.opensuse.org/repositories/home:/pontostroy:/X11/openSUSE_
>>>>> 12.3/x86_64/
>>>>>
>>>>> Current kernel:    3.12.1 vanilla from openSUSE repos, with
>>>>>
>>>>>                      -ck1 and BFQ patches
>>>>>
>>>>> The Logitech Trackman Marble FX is a PS/2 device and connected
>>>>> via an original Logitech
>>>>> PS/2-COM-port adapter and manually configured via my xorg.conf.
>>>>>
>>>>> At first, I blamed the -ck1 patches from Con Kolivas for this
>>>>> behaviour that I use in
>>>>> addition  to the BFQ patches, what has showed up as not right:
>>>>> This happens with the
>>>>> normal vanilla kernel
>>>>> schedulers for CPU and disk I/O, too.
>>>>>
>>>>> By coincidence I found a weird(!) way to reactivate the serial
>>>>> mouse:
>>>>> (1) call Hibernate (suspend-to-disk) from KDE desktop as normal
>>>>> (2) resume --> the PS/2 touchpad is working, the serial
>>>>> trackball NOT
>>>>> (3) call suspend-to-RAM (Sleep) from KDE, serial trackball
>>>>> still dead
>>>>> (4) execute `setserial -a /dev/ttyS0` in a konsole window or a
>>>>> tty* console
>>>>> (5) ==> serial trackball is back with all configuration from
>>>>> xorg.conf
>>>>>
>>>>> It's fully reproducible over multiple hibernations. This also
>>>>> happens when calling
>>>>> `pm-hibernate` (to-disk) and `pm-suspend` (to-RAM) and the
>>>>> setserial from a root shell
>>>>> in KDE or any tty*.
>>>>>
>>>>> Please, _always_CC_me_ -- as I'm not on the kernel mailing list.
>>>>
>>>> Manuel,
>>>>
>>>> Please attach complete dmesgs (zipped, if necessary) of a
>>>> suspend/resume cycle
>>>> on a vanilla 3.12.x (where resume fails) _and_ a vanilla 3.11.x
>>>> (where resume succeeds).
>>>>
>>>> For the test configurations, please do not apply patches.
>>>>
>>>> Regards,
>>>> Peter Hurley
>>>
>>> Thank you very much for your reply!
>>> Attached you'll find a zip file with the two edited dmesg logs of
>>> plain vanilla kernel runs.
>>>
>>> I have to add, that the resumes _do_ succeed in both cases, only
>>> the serial mouse doesn't get activated after hibernate in 3.12.x
>>> automatically. Just scan for and compare the lines indicating
>>> "serial 00:08: disabled" or "serial 00:08: activated". In 3.12.x
>>> the activation doesn't happen after hibernate, but after
>>> suspend-to-ram (sleep). That only after STR and not before a
>>> setserial gets my mouse back... a miracle. ;-)
>>
>> I do not see
>>
>>> [  206.577370] serial 00:08: activated
>>
>> in the restore from hibernation log of 3.12 which shoudl come from PNP
>> layer.
>>
>> [dtor@...r-d630 work]$ git log --oneline v3.11..v3.12 -- drivers/pnp/
>> 729377d pnp: change pnp bus pm_ops to invoke pnp driver dev_pm_ops if specified
>> ce63e18 Merge branch 'pnp'
>> 8ad928d ACPI / PM: Use ACPI_STATE_D3_COLD instead of ACPI_STATE_D3 everywhere
>> eaf140b PNP: convert PNP driver bus legacy pm_ops to dev_pm_ops
>>
>> I'd start looking into these commits.
>>
>
> Does the following patch fixes the issue?
>

PNP: fix restoring devices after hibernation

From: Dmitry Torokhov <dmitry.torokhov@...il.com>

On returning from hibernation 'restore; callback is called, not 
'resume'.
This fixes breakage introduced by commit
eaf140b60ec961252083ab8adaf67aef29a362dd

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
  drivers/pnp/driver.c |    3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
index a39ee38..185a24a 100644
--- a/drivers/pnp/driver.c
+++ b/drivers/pnp/driver.c
@@ -235,8 +235,9 @@ static int pnp_bus_resume(struct device *dev)

  static const struct dev_pm_ops pnp_bus_dev_pm_ops = {
  	.suspend = pnp_bus_suspend,
-	.freeze = pnp_bus_freeze,
  	.resume = pnp_bus_resume,
+	.freeze = pnp_bus_freeze,
+	.restore = pnp_bus_resume,
  };

  struct bus_type pnp_bus_type = {


YES! This patch fixes the issue!!! (Even if compiled with a 
patched kernel.)   ;-)

Many thanks for your work!

Manuel Krause

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