Resolving microphone problems in Ubuntu
In my journey in the world of Ubuntu, I got a problem while trying to use my headset micro while using Skype.
I searched on the internet and I found many links who talk about the problem but not exactly mine. So here a little howto to help you if you got my same problem.
This howto is realized on an Ubuntu 9.10 - the Karmic Koala
First, check your sound preferences in System -> Preferences -> Sound
In the input tab, you will have a list of the available sound input for your machine. For example, I got 2 microphone. The first for the one integrated with my webcam and the second was for the input plugin.
Sound Preferences
- Verify that your microphone isn't muted. It should look like this :
Input volume
If your microphone is working you should get something like this :
Microphone working
If you get something like this, your microphone is not working.
No microphone detected
Now, I will explain how I got it working for me. I did this while trying many things, so if you try it tell me if it's working actually. Also, it might not be the best solution.
So, I installed Gnome ALSA mixer.
In Synaptic (System -> Administration -> Synaptic Package Manager), type gnome-alsamixer in the search and install it.
You will find gnome alsa mixer under Applications -> Sound & Video. You will get something like this :
GNOME ALSA Mixer
Now adjust your input volume and make sure to test them all. In my case, it was Front Microphone which controls my headset micro. If you go back to the sound preferences, and using the right input you should see that the input of your microphone moving.
You can test the input with Sound Recorder (Applications -> Sounds & Video) or if you are using Skype with the Testing call (Options -> Sounds Devices -> make a test call).
This is it ! If you have some questions or remarks let me now.
Working with GWT on Ubuntu 9
It's will be simple to start the example project. expect that there's some things to do to run hosted mode.
Running the web application will give you an error like this :
** Unable to load Mozilla for hosted mode ** java.lang.UnsatisfiedLinkError: .../eclipse/plugins/com.google.gwt.eclipse.sdkbundle.linux_.../gwt-linux-2.0/mozilla-1.7.12/libxpcom.so: libstdc++.so.5: cannot open shared object file: No such file or directory at java.lang.ClassLoader$NativeLibrary.load(Native Method) at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1778) at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1674) at java.lang.Runtime.load0(Runtime.java:770) at java.lang.System.load(System.java:1003) at com.google.gwt.dev.shell.moz.MozillaInstall.load(MozillaInstall.java:190) at com.google.gwt.dev.BootStrapPlatform.initHostedMode(BootStrapPlatform.java:53) at com.google.gwt.dev.HostedModeBase.(HostedModeBase.java:434) at com.google.gwt.dev.SwtHostedModeBase.(SwtHostedModeBase.java:162) at com.google.gwt.dev.HostedMode.(HostedMode.java:282) at com.google.gwt.dev.HostedMode.main(HostedMode.java:241)
This is due that the libstdc++5 is missing from your Ubuntu.
Usually an update thorough apt-get can save
sudo apt-get install libstdc++5
but you can get this message
Package libstdc++5 is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package libstdc++5 has no installation candidate
Then you will have to get the libstdc++5 manually like this
# change directory to /tmp directory: cd /tmp/ # download deb package: wget -c http://lug.mtu.edu/ubuntu/pool/main/g/gcc-3.3/libstdc++5_3.3.6-10_i386.deb # unpack deb package to get library file dpkg -x libstdc++5_3.3.6-10_i386.deb libstdc++5 # copy library file to /usr/lib directory sudo cp libstdc++5/usr/lib/libstdc++.so.5.0.7 /usr/lib # change directory to /usr/lib directory cd /usr/lib # create a link to library sudo ln -s libstdc++.so.5.0.7 libstdc++.so.5
Now you will be able to run the hosted mode.
If you are using a 64bit linux you have to copy to /usr/lib32 instead of /usr/lib