Dual-Boot on UEFI PCs: Booting Ubuntu only works randomly

In my posting about using ubuntu on a Windows 9 laptop, i ended with:
But now rebooting works like expected (with Ubuntu and Windows 8).
After some more reboots and trying to start ubuntu, booting ubuntu only works randomly. Sometimes it worked after walking through BIOS/UEFI. Sometime it did (more...)

Linux and UEFI: Files, Mountpoints, Commands…

With Windows 8 secure boot is used. That means if you want to add a Linux kernel, this kernel has to be signed. After installing Ubuntu on a Windows 8 machine, here the directory listing of the /boot directory:
-rw-r--r-- 1 root root   844882 Okt  9  2012 abi-3.5.0-17-generic
(more...)

Using Ubuntu on a Windows 8 Laptop: because of UEFI more problems as expected

Today i tried to install Ubuntu on a Windows 8 Laptop. First thing: you have to use 12.04 or greater because Windows 8 uses secure boot with UEFI.

But after the first boot with a USB-stick i got:

(initramfs) Unable to find a medium containing a live file system
?? (more...)

Using Virtualbox images with Hyper-V

In 2008 i wrote about using vmware images with virtualbox. To migrate a host from virutalbox to Hyper-V, you have to do nearly the same, but you have to convert the hdd:
C:\Users\schroff>"\Program Files\Oracle\VirtualBox\VBoxManage.exe" clonehd
"c:\Users\schroff\VirtualBox VMs\Debian64-DS\Debian64-DS. (more...)

Hyper-V: Compile Linux Kernel with Microsoft device drivers

After knowing, that running a linux inside Hyper-V is only working with the "legacy" network adapter (look here), i was trying to build a kernel with the drivers (Microsoft has added the drivers into the Linux kernel versions >2.6.32).
There is one nice tutorial out there:

Hyper-V: Installing a debian linux in a virtual machine – trouble with the (non legacy) network adapter

First try with a virtualization solution like Hyper-V is to install a guest. So let's try debian linux.
The installer runs through this points:
  1. Name & path of the virtual machine
  2. RAM
  3. Network (how to configure a virtual switch with internet connectivity or how to configure internet connectivity with (more...)

Hyper-V: Howto configure NAT for virtual machines

In my last posting i explained how to configure a vEthernet adapter to get connectivity to the internet. But there was one "problem": You had to provide one seperate IP for each virtual host, you want to connect to the internet.
But there is a solution (NAT) for this problem (more...)

Hyper-V on Windows 8: External virtual switches do not work – Howto connect a virtual host to the internet

First thing you have to do after enabling Hyper-V is to set up your network for your virtual machines. This is not so easy, because some things do not work...
So let's start: Open the Virtual Switch Manager
There you have three options:

  1. external (connectivity to the internet)
  2. internal (connectivity (more...)

Windows 8: Enabling Microsofts Hyper-V virtualization platform

If you are running a Microsoft Windows 8 Professional, you can use Microsofts virtualization platform Hyper-V. To get the management window you have to open
C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Hyper-V Management Tools
and double click the icon:
If this icon (or the path) is not there, you have to enable Hyper-V:
Open your (more...)

Nexus 7: Encrypting all data

After loosing all data on a completely discharged Nexus 7 (look here), i decided to encrypt the storage with my own password, so that i should be able to give the right pin into the "type password to decrypt storage"-question (hopefully).
  • Advantage:
    never loose my data again
  • Disadvantage
    on (more...)

Android Update: 4.2.2

Three months after the upgrade from Android 4.2 to 4.2.1 i got the option to update my Nexus 7 to 4.2.2. As before there is no official statement about the bugfixes or changes in this new version. The only thing is the confirmation screen the:

(more...)

Nexus 7: "Type password to decrypt storage" after completely discharged


After not using the Nexus 7 for some weeks, i got the following screen:
No password worked... Switch off/on... same screen again.
How to get out of this loop?
  1. Switch the device off (press and hold power button)
  2. Press and hold all three buttons. You will see the following:
  3. Use (more...)

Windows 8: Configuring focus follows mouse and auto-raise behaviour

After switching to Windows 8 i was trying to configure the same mouse over behaviour as i am used to on my debian linux.
If you just want focus follows mouse and auto-raise=true, then follow the description given here.
If you want focus follows mouse and auto-raise=false, then you have (more...)

More Features on Windows 7 & 8 with replacing Microsofts default driver "PCL6 Class Driver" with HP "Univeral Print Driver"

If you have to use HP printers on Windows 7 or 8, you can use the drivers provided by Microsoft. But if you want to change printing properties like duplex mode or pages per sheet and you select "Eigenschaften.. / Properties..."

you only get:

But there is an easy (more...)

Apache ODE: Modelling BPEL with Eclipse and BPEL Designer

After installing the BPEL designer into eclipse here the first steps to get a project and a first workflow:
First you have to create a new project and choose BPEL Project:

Inside this new project you have to add a bpel process:
and here we go:

Using Apache’s BPEL: Installing the Designer into Eclipse (ODE)

After more than 5 year after getting in touch with BPEL and many postings about Oracles BPEL PM and SOA Suite i wanted to see, how easy it is to get started with Apaches BPEL implementation.It is called ODE (Orchestration Director Engine) and eclipse provides BPEL Designer Project as (more...)

Google indoor maps: How to use…

Yesterday i read at heise.de about Google indoor maps were released for Germany. So i tried to take a look at the indoor map of Frankfurt Aiport but i only got:

No indoor map. Was this headline wrong? I searched around and found http://www.google.de/mobile/maps/:

Newest Android (more...)

Windows 8: Blue screen of death (BSoD) is back and its more helpful like ever before

After installing Cisco VPNClient on a Windows 8 pc, the system got unstable and every 30-60s a BSoD and a reboot occured.
After 5 times the BSoD changed to the following screens:

i chose troubleshoot:

Reset did not really looked like what i wanted, so i chose "refresh your pc":

Android Update: 4.2.1

Two weeks after the upgrade von Android 4.1 to 4.2 my devices was updated to Android 4.2.1.
There is no official statement about the bugfixes or changes in this version. The only information is the confirmation screen before the update:

(The webpage http://www.android.com/whatsnew/ only (more...)

Android 4.2: Developer Options

If you try to build your own Android applications, you have to enable "Developer Options" on your device. After upgrading my Nexus 7 to Android 4.2 there is no entry "Developer Options" inside the settings menu. Google has hidden this entry in order to do not confuse normal users...
(more...)