IntelliJ IDEA greyed at startup

did you try jdk6...(dunno if jdk7 is  officially supported by Jetbrains)

http://www.jetbrains.com/idea/download/system_requirements.jsp?os=linux

• GNOME or KDE desktop
• 1 GB RAM minimum, 2 GB RAM recommended
• 300 MB hard disk space + at least 1 GB for caches
• 1024x768 minimum screen resolution
• Sun JDK 1.6 (OpenJDK NOT supported)

¿?..
Now I choose:


dennis@r00t:.java$ sudo update-alternatives --config java
Existen 6 opcioens para la alternativa java (que provee /usr/bin/java).

  Selección   Ruta                                           Prioridad  Estado
------------------------------------------------------------
   0            /usr/lib/jvm/jdk1.7.0/bin/java                  1065      modo automático
   1            /usr/bin/gij-4.4                                1044      modo manual
   2            /usr/bin/gij-4.6                                1046      modo manual
* 3            /usr/lib/jvm/java-6-openjdk-i386/jre/bin/java   1061      modo manual
   4            /usr/lib/jvm/java-6-sun/jre/bin/java            63        modo manual
   5            /usr/lib/jvm/java-7-openjdk-i386/jre/bin/java   1051      modo manual
   6            /usr/lib/jvm/jdk1.7.0/bin/java                  1065      modo manual


and it works :| .. but not works with /usr/lib/jvm/jdk1.7.0/bin/java .
Definitely  don't works with /usr/lib/jvm/java-6-sun/jre/bin/java, I get an error: "no exist tools.jar"  :)

Help please! :( I don't want to work with openjdk XDDD

you need JDK instead of JRE

You can set the IDEA_JDK environment variable to the root directory of the JDK you want to use (Java 6 recommended, OpenJDK not supported). If the IDEA_JDK environment variable is not set, the startup script will fall back to using the JDK_HOME environment variable. If that is not set, it will fall back to using the JAVA_HOME environment variable. At least one of those must be set to, as M. J. Milicevic mentions, a valid JDK; not a JRE. It should be set to the root directory of the JDK. That is the directory that contains the bin, lib and jre directories. Not to the bin directory itself. Generally it is best to set the IDEA_JDK environment variable so you can explicitly control what version IDEA runs under.

I hope that helps.