Hello everyone

1. Audio: "The audio playback device HDA Intel (VT1718S Analog) does not work.
Falling back to HDA NVidia, HDMI 0 (HDMI Audio Output)."

2. what need to do re-enable OpenGL and escape crash?

"OpenGL compositing (the default) has crashed KWin in the past.
This was most likely due to a driver bug.
If you think that you have meanwhile upgraded to a stable driver,
you can reset this protection but be aware that this might result in an immediate crash!"

3. Eclipse error then i trying to save: "Save Failed
tried to access method org.eclipse.ui.internal.WorkbenchPage.getActivePerspective()Lorg/eclipse/ui/internal/Perspective; from class net.sourceforge.phpeclipse.ui.editor.BrowserUtil"

thanks for help

Pass on 3, sounds like a permissions thing.
On 1 & 2 it would help to know what you have installed, and what you have tried. Particularly video drivers, mesa version, and what soundcards are on board.