[RESEND] 3.12.x looses serial mouse over hibernate + resume

[Manuel Krause <manuelkrause@netscape.net>]

If noone is feeling responsible, please, forward this to someone 
capable!
Please ask me later for additional information, as I won't post 
my full system info to lkml at first.

The module in question may be: serio_raw

Best regards, Manuel Krause

On 2013-11-26 23:19, 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.
>
> Thank you in advance and best regards,
> Manuel Krause