General OpenELEC Configuration

Shutdown function should suspend:

System -> Settings -> System Powersaving -> Shutdown function: Suspend

XBMC + TVHeadEnd + HDHomeRun

Installation

Guide to openelec, tvheadend, XMLTV, and a working PVR with hdhomerun

Configuration

Change tuner type to DVB-C

Make a copy of dvbhdhomerun.sample to dvbhdhomerun.conf

Open \\xbmc\Userdata\addon_data\driver.dvb.hdhomerun\adapters and copy the names of the two tuners to dvbhdhomerun and set their types (just follow the instructions in the config file.).

Reboot.

General Config

Follow step 3 in the link above (“Click “Add DVB Network by location…” etc.)

In the web config in Configuration -> TV Adapters: After all channels have been configured, disable “Autodetect Muxes” and “Idle Scanning“. Having these enabled completely destroyed the stream from TVHeadEnd, making the image look garbled and stuttering. It looked like a low bandwidth connection or bad signal.

Resume from Suspend (S3) in XBMC

In XBMC Eden, the power to the USB ports is cut when S3 is entered. It is therefore impossible to wake the system using the MCE remote or any other device connected via USB.

The following two fixes in combination resolves this problem:

Getting power to usb when in sleep
HOW-TO:Enable Wake-On-Device for Ubuntu

Samba Sharing in XBMCbuntu

Samba is not included with XBMCbuntu (at least in 11.10), so first we have to install it:

Open Samba’s configuration file in an editor

Scroll down to the bottom of the file and add the following sections, which will create a public share with read/write access without password validation:

The above configuration example shares everything under the /media directory in a folder called “public”. The “force user” property must be set to a user with write access to the directory being shared. All files and directories will appear to have been created by this user.
Run “testparm” to check if your Samba configuration is parseable. For configuration changes to take effect, the Samba daemon can be restarted with

The following screenshot shows my XBMC box sharing the /media directory which contains mount points for two harddrives (ingeniously named according to their capacities…):

XBMC Setup

The following articles describes my XBMC setups.

XBMCBuntu
Resume from Suspend (S3) in XBMC
Samba Sharing in XBMCbuntu

OpenELEC 2.0

Configure audio device

HDHomeRun + TVHeadEnd

DD-WRT on Linksys E2000

These are the steps I took to flash a Linksys E2000 router with a DD-WRT firmware.

Background information

http://www.dd-wrt.com/wiki/index.php/Linksys_E2000

http://www.dd-wrt.com/wiki/index.php/Installation

Steps Taken

- 30/30/30 Reset
- Upload dd-wrt.v24-18024_NEWD-2_K2.6_mini-e2000.bin via Linksys firmware upgrade page from ftp://ftp.dd-wrt.com/others/eko/BrainSlayer-V24-preSP2/2011/12-20-11-r18024/broadcom_K26/
- Wait 5 minutes after upload completed.
- Web interface for DD WRT appears.
- Do a 30/30/30 reset again.
- Wireless > Advanced Settings enter 50 in the Tx Power entry. This should make for less Tx/Rx Errors and help the unit run cooler.

General:

- Initital DD WRT firmware flash must be a trailed build. A trailed build has “*e2000.bin” in its name. Following flashes must have “*e2k-e3k.bin” in their name.

Debug a Junit Ant Task from Eclipse

Sometimes you run into a test that works when run from within Eclipse but not from the command line. To debug the failing test from Eclipse, you can configure the Junit ant task to accept remote debugging sessions.

This can be done by adding the following lines to the junit task:

<junit fork="true">

		<!-- For remote debugging from Eclipse -->
		<jvmarg value="-Xdebug" />
		<jvmarg value="-Xnoagent" />
		<jvmarg value="-Djava.compiler=NONE" />
		<jvmarg
value="-Xrunjdwp:transport=dt_socket,address=8787,server=y,suspend=y" />

This will make the task wait for an incoming debug connection on port 8787. It is necessary to have the fork attribute on the junit task set to true, because the jvmarg values can only be given to a starting Java virtual machine.

Get XML String from JQuery XML Object

Problem: You have an XML structure in a JQuery object and now you want to extract a string with the raw xml.
Solution: Use the XMLSerializer class. This class provides methods for serializing DOMs and nodes into text or byte streams. In our case, we will call the serializeToString(data) method:

Linux Commands

find

Find all files from current directory and subdirectories

Result

Finding files by date: http://www.cyberciti.biz/faq/howto-finding-files-by-date/

du

Show total disk usage of a directory:

du -sh /tmp/somedir

Computer Forensics

The tools I use for computer forensics.

Windows

• Recuva – Excellent at recovering data from Windows partitions and free to boot.
• UFS Explorer – Not free, but is able to recover from linux partitions (Recuva is better for FAT/NTFS)
• explore2fs – Access linux partitions from Windows. Free.
• HFSExplorer – Access Mac partitions from Windows

Linux

• Hiren’s Boot CD – Contains an impressive lineup of programs for computer forensics, but its legal status is often debated.
• Trinity Rescue Kit – A live distro with backup programs, Midnight Commander, testdisk, shell and other good stuff. Legal!