Category Archives: Multimedia

No sound when plugging in headphones

Notebook model: Terra Mobile 1773P
OS: Ubuntu 12.04, 64bit
Loaded modules: snd_hda_codec_realtek, snd_hda_intel

Sound works fine while listening via notebook speakers.
But when plugging in headphones, there is no sound at all.

Checking alsamixer (in command line) shows that “Headphone” cannot be chosen, and “Speaker” is muted. When turning up “Speaker” volume, there is sound on the headphones…

Permanent solution:
Edit /usr/share/pulseaudio/alsa-mixer/paths/analog-output-headphones.conf :

[Element Speaker]
switch = mute
volume = merge

Online Whiteboard

At ScRiBLink you’ll find a free, powerful whiteboard where you and your colleagues can work on your ideas together.
No registration is required : )
Additional features like
– picture upload
– chat
– math functions
– multiple users
– ….
give you a good base to start sharing concepts online, etc..
Note: Maybe it’s not working behind corporate firewalls because it uses additional tcp ports.
Online Whiteboard
If you know about alternatives, please comment.

When console columns and lines are not enough

If you want to use a higher resolution on your linux console, you have to add the specific option while loading the kernel.
i.e: kernel /vmlinuz-2.6.25 root=/dev/sda3 resume=/dev/sda2 vga=0x0325

Problem: The settings differ depending on your graphics card.
But: There is an easy way: hwinfo

[ sudo ] hwinfo −−framebuffer

Example output:
Mode 0x0307: 1280×1024 (+1280), 8 bits
Mode 0x031a: 1280×1024 (+2560), 16 bits
Mode 0x031b: 1280×1024 (+5120), 24 bits
Mode 0x0305: 1024×768 (+1024), 8 bits
Mode 0x0317: 1024×768 (+2048), 16 bits
Mode 0x0318: 1024×768 (+4096), 24 bits
Mode 0x0312: 640×480 (+2560), 24 bits
Mode 0x0314: 800×600 (+1600), 16 bits
Mode 0x0315: 800×600 (+3200), 24 bits
Mode 0x0301: 640×480 (+640), 8 bits
Mode 0x0303: 800×600 (+832), 8 bits
Mode 0x0311: 640×480 (+1280), 16 bits

Thanks to Gerd [de] for the hint.

HP Scanjet G2710 w/ Ubuntu 8.04 (Hardy Heron)

Today, I bought a new scanner – of course without checking linux compatibility : |
HP – a well known brand. Description says “Works with Max OS X, Win Vista, XP, 2000”. Linux wasn’t mentioned, but that’s quite common.

The default xsane backend package (<- v.1.0.19 [delivered with Ubuntu Hardy]) didn’t find a device, so I tried installing the beta release of the hp3900 sane backends (drivers).
This version is still beta status, but got my new scanner up and running : )

Continue reading HP Scanjet G2710 w/ Ubuntu 8.04 (Hardy Heron)

Ubuntu 7.10 – The Gutsy Gibbon

I’m absolutely fascinated by the new Ubuntu release (18 October 2007).

New features, that I like:

  • Repositories are very easy to add
  • Hardware detection is great
  • Improved Gui, nice desktop effects
  • Support for WEP, WPA, PPTP, etc. out of the box

I just installed the system and it was never easier to set up wireless lan or a vpn connection in a linux distribution… Keep up the good work!

Screenshots of my desktop:

Ubuntu 7.10 Screenshot

Task switching All Desktops transparency
(click to enlarge)

Save and convert flash streams

If you want to convert a flash stream into a more comfortable format, that can be saved on your local disc and be played by most software/hardware, here’s a short guide:

Save your prefered video (from i.e. YouTube, MyVideo, etc.) with KeepVid.

When FFmpeg is installed, the conversion in Linux is quite simple:
ffmpeg -i input.flv -ab 128 -ar 44100 -b 900 \
-s 640x480 output.mpg

-b = videobitrate
-ab = audiobitrate
-ar = audiosamplerate (Hz)
-s = framesize width * height