I encoutered some problems with my touchpad on ubuntu:
While typing some text, the touchpad signalled the mouse some strange moves. Sometimes it marked parts of the text and the next key erased the highlighted text...
First idea was to edit the xorg.conf or something else, but i found a less difficult was via touchpad-indicator.
It can be installed via
apt-get install touchpad-indicator
Alittle problem is, that you can not run it via cli (more...)
Over the last three months i read a really amazing book about quality of service techniques.
Today everyone has internet access with more than 50Mbit/s, it seems like overbooking does not happen anymore and traffic priorization is no longer needed.
But this is only the half of the truth: Using cloud service, video streaming, onling gaming, ... you can really fast reach the limit of your internet access bandwith.
Companies face the same problem at a (more...)
If you are running a webpage and you decide to move to SSL protection you can encounter the following problem: Inside your webpage you are using tags like "iframe", "script" or "link" pointing to HTTP servers. This is considered as mixed active content (mozilla
Mixed active content
is content that has access to all or parts of the Document Object Model of the HTTPS page. This type of mixed content can alter the (more...)
Each time i resume my notebook after a suspend to disk-cycle the connection to WLAN hangs with the following message:
(Die Systemrichtlinien verhinder das Bearbeiten von Netzwerkeinstellungen für alle Benutzer / Enter password for default keyring to unlock)
I tried to fix this via network-manager with adding the hook at the checkbox "Alle Benutzer dürfen dieses Netzwerk verwenden", but this did not help at all.
The point is, that after resuming my login keyring wants (more...)
Today i finished the book "Projektbegleitendes Projektmanagement:
The author created a quite good reference for project and quality management. If you need a short summary of ISO 9001 or best practices for quality assurance, you will find this in a few pages.I would like to pay particular attention to the following part:
The chapters 9 to 11 contain many checklists, table of contents for some needful documents and so on...From my point of (more...)
Ten years ago after a lecture given at the Technische Universität Kaiserslautern i started this blog with this posting
(about the lecture). And you can see: the link does not work anymore but the screenshot still remains after such a long time.
After this post, i owned a blog, with one entry and noticed that finding topics to write about is not really easy.
In August 2017 i started to write about Oracle products like (more...)
Today i read the book "Fundamentals of 5G mobile networks":
This book is a collection of 10 articles around 5G, framed by an introduction and summary from the editor Jonathan Rodriguez.
More or less every article starts with the same motivation for 5G: mobile traffic will increase 1000times form 2010 to 2020.
Here some findings from the articles:
- 5G is not one radio access technology (RAT). It will be a collection of RATs like small (more...)
This weekend i read the following book
Software Product Lines in Action tries to explain, why a company should move from contract-based development to its own product strategy. But this change does not only involve software engineering - organizational changes, business process changes, technology changes, .... And the author states "Bringing comprehensive change to a software development organization isn't easy, and false starts are expensive."
The book has three divisions: "Aspects of Software product (more...)
Sometime ago i read the following book
For all who do not know what BIP stands for: Bochumer Inventar zur berufsbezogenen Persönlichkeitsbeschreibung
And as you can see: This is something, what is only used in Germany - wikipedia has no translation in english or any other language.
If you are interested, take a look at my review at amazon.de
. (like all my reviews: written in german ;-).
On a new Lenovo laptop i had some issues with supsend/resume.
I installed tux on ice and the suspend process worked, but the resume just freezed after some seconds.
First step to solve this problem was to stop the graphics (/etc/init.d/lightdm stop) and try it again.
This attempt worked without a problem, so it was clear: the resume problem is a issue with the graphic card:
01:00.0 Display controller: (more...)
Today i ran with a laptop into the following problem:
After a reboot the system lost its WLAN:
# uname -a Linux Notebook 3.13.0-86-generic #131-Ubuntu SMP Thu May 12 23:33:13 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
# lspci | grep 802.11
02:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01)
Trying a modprobe wl failed...
There were some posts, which suggested to install kernel-drivers, dkms and so on, but (more...)
I was running my own kernel on my laptop. But doing the upgrade from debian 7 to 8, i ran in the following problem:
Since release 198, udev requires support for the following features in
the running kernel:
- inotify(2) (CONFIG_INOTIFY_USER)
- signalfd(2) (CONFIG_SIGNALFD)
- open_by_handle_at(2) (CONFIG_FHANDLE)
- timerfd_create(2) (CONFIG_TIMERFD)
- epoll_create(2) (CONFIG_EPOLL)
Since release 176, udev requires support for the following features in
the running kernel:
- devtmpfs (CONFIG_DEVTMPFS)
Please upgrade your (more...)
After i moved to jessie (Debian 8) my laptop moved to suspend to RAM about half a minute after startup.
There was no message in the logfiles and even worse the resume does not work at all...
The configuration for the suspend was in here:
After changing the lines "HandleLidSwitch" and "HandleSuspendKey" to ignore (more...)
After the dist-upgrade the ipw2200 wireless chipset drivers are missing.
No more internet access - so i had to use a good old LAN cable ;-)
The fix was very easy:
apt-get install firmware-ipw22x00
and the wireless network is up again...
After several years i decided to upgrade my old laptop to the current debian version.
ran into the following problem:
insserv: warning: script 'K01hotplug-net' missing LSB tags and overrides
insserv: warning: script 'K01x2goserver' missing LSB tags and overrides
insserv: warning: script 'K01oracle-xe' missing LSB tags and overrides
insserv: warning: script 'S85vpnagentd_init' missing LSB tags and overrides
insserv: warning: script 'S02vpnclient_init' missing LSB tags and overrides
insserv: warning: script 'S15initrd-tools.sh' missing (more...)
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 (more...)
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:
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 (more...)
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... (more...)
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 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.
BIOS virtualization enabled
Intel Processor Identification Utlility in 8.1: virtualization disabled
BIOS virtualization disabled
Intel Processor Identification Utlility in 8.1: virtualization enabled
With both settings: Virtualbox runs 32bit guests but no 64bit guests.
After some searching, (more...)