Dietrich Schroff

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Dr. Dietrich Schroff
Updated: 12 hours 1 min ago

Journalismus, den die Welt braucht. Teil 3 | Pearls of journalism. Part 3

Tue, 2016-08-23 14:00
Yippie! I got a new release of IT-BUSINESS:
 And inside there was really nice article:
aha. I did not get this, but there is a magic weapon called chain management. Let's see what Google Translate does with this text:
Channel conflict threatens

The comparison of the "delivery price of Distribution" (blue line) with the average "sales price of Channels" (green line) makes it clear that price reductions on the part of distribution only be partially passed through the channel to the end customer. This focuses thus partially more on profit than on volume growth. A coordinated supply chain management is the solution to avoid such a channel conflict and specifically to develop benefits for participants
I think the english text is much more understandable than the german version...

Journalismus, den die Welt braucht. Teil 2 | Pearls of journalism. Part 2

Sun, 2016-08-21 13:47
Two weeks ago i started a first experiment with translating strange articles by Google (see here).
This was the next snippet (from IT-BUSINESS), which was a little bit weird:
Aha. Fog Computing...

Let's see, what Google Translate means to this:

Fog Compuing

The Fog is all symbolize the cloud around. It is all about the primary processing of data close to the data encoder, such as in the car or in the refrigerator before it is to be forwarded to cloud services. The more devices are connected to the cloud, the more data must be downloaded from and to the cloud. Fog Computing to store data that are needed for a specific device right there too and process.
"Downloaded from and to the cloud"...
For this snippet it wasn't really helpful to translate it into to english. But Fog Computing is a nice neologism ;-)

Journalismus, den die Welt braucht. Teil 1 | Pearls of journalism. Part 1

Fri, 2016-08-05 14:07
Today i browsed the magazine IT-BUSINESS  and read some really annoying articles. It was just words without building meaningful setences. It was so stunned, that i decided: I have to do something...

The  following idea came into my mind:
What about translating the part of the article, which i did not understand via Google Translate? Perhaps in english it sounds more meaningful (and more than 20% of the words are just technical terms in english...)

And after Google Translate:

Matching promotional concepts

In replacement markets optimization of promotional activities is one of the easiest ways to improve the profit. A price reduction associated with the direct delivery into the channel leading to a significant decline in sales in the distribution. A channel conflict could follow: The inventory turnover in the distribution decreases the Profitabliltät in the width of the channels decreases. It is a further price action required to stimulate demand again. It is more settled, for all concerned but worsens the profit situation.
Wow. It is really easier to understand this...

Android Update: 5.0

Tue, 2014-11-18 14:27
Today my Nexus 7 got the upgrade to Android 5.0:
 After this upgrade, many things changed, like the system settings:

But everything is slower than before.... ;-(

For a complete history of all updates visit this posting.

Virtualbox: only 32bit guests possible even though virtualization enabled in BIOS / Intel Process Identification Utility shows opposite to BIOS virtualization setting

Fri, 2014-10-03 04:08
Virtualbox on my Windows 8.1 stopped running 64bit guests a while ago. I did not track down this problem. Now some months later i tried again and found some confusing things.

First setting:
BIOS virtualization enabled
Intel Processor Identification Utlility in 8.1: virtualization disabled
Second setting
BIOS virtualization disabled
Intel Processor Identification Utlility in 8.1: virtualization enabledWith both settings: Virtualbox runs 32bit guests but no 64bit guests.

After some searching, i realized, what was happening:
I added Microsofts Hyper-V virtualization. With that enabled Windows 8.1 is no longer a real host. It is just another guest (the most important guest) on this computer. So with Hyper-V enabled i was trying to run Virtualbox inside an already virtualized Windows 8.1.
After that it was easy: Just disable Hyper-V on Windows 8.1:

And after a restart of Windows 8.1 i was able to run 64bit guests on Virtualbox again....

Wireshark hanging on Windows 8.1 at startup

Wed, 2014-09-24 14:09
After upgrading Windows 8 to Windows 8.1 my wireshark freezed on every startup without showing up the main window.
The only workaround was to deinstall wireshark including wincap and installing it again. But after the nex reboot, it freezed again.

After searching around i found the following fix, with cured this problem:

inside the registry you have to change the DWORD start in

from 0 or 1 to 2. After that wireshark will start properly even after reboots....

Another possible solution are to issue these commands as administrator:
sc start npf
sc config npf start= delayed-auto

Android Update: 4.4.3

Thu, 2014-06-19 12:36
After nearly everyone upgraded to 4.4.3 my device came up with the icon for upgrading android to its next version:

For a complete history of all updates visit this posting.

FritzBox 7270: CLIP stops working after upgrading to FritzOS 6.05 (problem solved)

Wed, 2014-06-11 00:02
After upgrading to FritzOS 6.05 CLIP stopped working with my analog phone.
The settings looked quite ok: (Telefonie -> Telefoniegeräte -> bearbeiten -> Merkmale des Telefoniegeräts)

This basic feature was certainly not shipped without testing. So this has to be a problem of data/parameter migration.
After unchecking CLIP, doing a reboot and checking the box again CLIP, it worked like before...

Mounting VMWare-Volumes/Disks with Debian

Tue, 2014-05-20 15:30
Some time ago a vmware server did not recognize any more a data disk. This disk was formatted with vmfs v3 (enter the vmware server via ssh and type mount..). First thing i did, was creating an image of this disk, to play around without any danger of data loss.

There is a good article how to mount vmfs, but on debian i had to install the package otherosfs.

After i installed this package, i got the following error:

root@debian:/tmp# vmfs-fuse image /mnt/vm
VMFS VolInfo: invalid magic number 0x00000000
VMFS: Unable to read volume information
Trying to find partitions But: Do not worry about this error message. The image was mounted on /mnt/vm and accessible without any problem...

Ubuntu upgrade to 12.04: grub timeout does not work anymore

Sun, 2014-03-30 14:11
After doing the upgrade and solving some issues with my screen-resolution, another grub problem hit me:
The timeout for booting the standard kernel did not work anymore.
Inside /etc/default/grub
GRUB_TIMEOUT=10and update-grub, grub worked like
 GRUB_TIMEOUT=-1If you need a  good manual  just look here, but this does not help me, too.

After some tries, i did the following:

In /boot/grub/grub.cfg i changed from
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
  set timeout=-1
  if [ x$feature_timeout_style = xy ] ; then
    set timeout_style=menu
    set timeout=10
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
  set timeout=-1
  if [ x$feature_timeout_style = xy ] ; then
    set timeout_style=menu
    set timeout=10
fiThis works, but i have to redo the change everytime update-grub is used...

Ubuntu upgrade to 12.04: screen only works with 1024x768

Sun, 2014-03-30 13:57
After upgrading a laptop-system to 12.04 (precise pangolin) X only starts with a resolution of 1024x768 and not with 1366x768.
I followed many postings and tried many things:
  • add new resolution with xrandr (here)
  • create a xorg.conf file (here)
  • add new drivers (here)
  • ...
But there was only one thing wrong: /etc/default/grub

After changing the following line everything worked:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.modeset=0 to
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"(i added i915.modeset=0  because with the older ubuntu version hibernate does not work and this configuration fixed it. [link])

Telegram on two devices...

Tue, 2014-02-25 14:32
After trying Whatsapp on 2 devices without success, i tried the same thing with telegram. Telegram says about multiple devices:

So let's see...
Registering the mobile phone was straight forward: a SMS with a verification code and that's it.
Registering was easy: just another SMS
And after entering the code on the tablet i got the following message on my mobile phone:
After that every conversation or more precise: every unsecure conversation is broadcasted to all of your devices. That means, you can switch over from phone to tablet without loosing your context... really cool!

Smart Meter@Home: Fritz!Powerline 546E - really smart?

Tue, 2014-02-18 14:15
Everyone is talking about Smart Meter - is it possible to get in touch with this topic by buying a Fritz!Powerline 546E?

The key points of Smart Meters according to wikipedia are:
  • real-time or near real-time sensors
  • power outage notification
  • power quality monitoring 
  • collect, and analyze energy usage
What is supported by the 546E?
  • power outage notification: no way without a battery ;-)
  • real-time or near real-time sensors: one measurement per minute
  • power quality monitoring: voltage monitoring
  • collect and analyze: 

But there are some shortcomings:
  • graphs and data only local on 546E, no integration to any central server, not even to a Fritz!Box (because of a missing DECT interface)
  • configuration as WLAN repeater not described in the manual (only powerline)
  • export via web frontend limited to 5 minute-intervals only 24 hours
  • automated export only via E-Mail and limited to this:


Whatsapp on 2 devices: "does not work, tell why!"

Tue, 2014-01-28 13:58
After nearly everyone of my friends is using whatsapp, it was overdue to download this app.
Why is this app used by everyone? What's cool about this app?
  • You have to do nothing after the download except this sms-verification
  • No account creation
  • No new password (or reuse another one <- li="" nooo="">
  • No need for searching addresses
  • You do not have to take care about your contact list
  • Just start messaging
Why does this work? Whatsapp uses your phonenumber to build the account identifier. The app scans your phone address book and builds its own contact list. Fine.


Not at all: If you want to add whatsapp on a second device with no sim card (e.g. your tablet), you can find several instructions but: after adding whatsapp to this device, whatsapp on your phone does no longer work...
Whatapps says:
Your WhatsApp account can only be verified with one number, on one device.
If you attempt to frequently switch your WhatsApp account between different devices, at a certain point, you may be blocked from re-verifying your account. So please do not repeatedly switch between different devices.
WhatsApp Support TeamFinally i would say: The biggest advantage is also the biggest disadvantage. Using the phonenumber as account id makes everything easy but prevents the usage of more than one device....

Android Update: 4.4.2

Sat, 2013-12-14 04:16
Only two week after upgrading to Android 4.4 the next update was available:
And like all other minor upgrades: no information about the updates....
If you compare the information you notice the kernel upgrade from 3.1.10-gee1a0b2 to 3.1.10-g4776c86.
For a complete history of all updates visit this posting.

Adding Statcounter to Contao-CMS

Sun, 2013-12-08 03:47
If you are running a Contao based website and you want to add the snippet for statistics, there is no manual how to to this. I tried some different things, and this was my solution:

  • Create a file name counter.html on your webserver on toplevel of the Contao system (htdocs or something equivalent).
  • Put the Statcounter snippet in this file
<-- Start of StatCounter Code for Default Guide -->
(script type="text/javascript")
var sc_project=NNN; 
var sc_invisible=1; 
  • Then add the following next to the last line inside index.php:
include 'counter.html';
  • After that you will be able to get your statistics via

    Android Update: 4.4

    Tue, 2013-12-03 14:44
    After nearly everyone got the update, my device came up with this tiny icon:
    And here we go:

     If you follow the link you will get the following information:
    • KitKat 4.4: Smart, simple, and truly yours 
    • and several other enhancements of version 4.4
    And here the system information after the update:
    For a complete history of all updates visit this posting.

    Windows 8: create system image fails with 0x80070001

    Sat, 2013-10-26 03:06
    Last week i tried to create a system image with the built-in backup-tool from Windows 8. It sounds very easy:
    • connect an usb storage to your computer
    • start system image creation (look here)
      But then i got this error: 0x80070001

    After googling around i found the following solution:
    But there you get something with junctions and FAT-filesystems... This did not solve the problem...
    The solution was very easy: I had truecrypt running and this created an additional mount point. After stopping truecrypt the system image was created without any error...

    Windows 8.1: Update via Store

    Thu, 2013-10-17 13:25
    Yesterday i did the update from Windows 8 to Windows 8.1 via Windows App Store. Here some screenshots:

    The Download took more than 1 hour...
    The some configurations before the reboot:
    But after the reboot it took more than 15 minutes until i was able to login again. And that without any progress bar - just several messages like configuring applications and more than once percentage indicators running from 0% to 100% and then the next one...

    Android Update: 4.3

    Sat, 2013-08-03 14:38
    This week my Nexus 7 came up with this notification:
    I read about that Google launched 4.3, so i tapped on this notification and:
    And this time Google provides some information about this release.
    One really nice thing is, that with 4.3 it is possible to create restricted user accounts and you can grant these accounts access to specific apps, which you already installed. This is exact the thing you need, if you want to create accounts for your children without app store access and without creating them e-mail accounts....