Additional information:
- Using KDE/Plasma as GUI
- current (again leading to freezes) kernel is 4.1.26-4.g294632f-default from
   OBS Kernel:openSUSE-42.1 repo

I was asked to create a new bug - maybe a duplicate of bug 971695.

Symptoms are looking very at least very similar:

- System has been rock solid stable up to and including
kernel-default-4.1.13-5.1. 
- After upgrading to newer kernels, offered by KDE's "Software Updates"
applet/plasmoid, system randomly freezes from a couple times a day to over a
week. 
- After beeing freezed for a minute or so, the system reboots on its own. 
- There are no signs of an upcoming freeze -- everything just stops, 

Symptoms of the freeze: Screen stays with the same image. I didn't see anything
interesting in the system journal - it just abruptly ends. I have also noticed
that my system rebooted on occasion when nobody was using it or even logged in. 

NOT reproducible but my strong "feeling": Freezes are happening, when a lot of
disk activity is in the background on an USB 3.0 external HDD, and user mouse
activity in the foreground (USB mouse).

These phases of high external USB 3,0 HDD activity are e.g. daily "Back in
time" backups. External USB 3.0 HDD is NTFS. UNFORTUNATELY these freezes are
nearly always leading to a CORRUPTED NTFS file system. NOT detected by any
linux tool I'm aware of, But all following "Back in time" backups are
unsuccessful due to various reasons. MS Windows based CHKDSK /F detects
hundreds, sometimes thousands of errors. On a nearly new HDD, no bad blocks,
and ALWAYS checked and repaired after these freezes. Two cycles, to sure that
all corruptions are fixed.

As these are my by backups, this bug is more than SERIOUS for me. To be on the
save side I'm making full "dd" based image backups of the whole internal drive
(SSD) after booting OpenSuse 13.2 from an live stick. 

Initially searching for solution I've found the mentioned bug 971695. 
I've added some "me 2" comments, installed yast's kernel-kdump and was able to
get a crash dump for kernel 4.1.15-8-default. Not sure if this is of interest.

I've got the hint to upgrade to kernel 4.1.25
(https://bugzilla.opensuse.org/show_bug.cgi?id=971695#c19). Following this,
I've got no freezes anymore for 4.1.25 and as far as I know two following
kernels from OBS Kernel:openSUSE-42.1 repo.

Current kernel is now 4.1.26-4.g294632f-default, as very frequently kernels are
offered from OBS Kernel:openSUSE-42.1 repo. And 4.1.26-4 reintroduces the
freezes :-(

Twice yesterday, and I've reactivated the kernel-kdump option, which I've
deactivated after the problem seemed to be solved.

Please advice how to proceed.