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VLC does have parametric equalizer since v1.1.0 RC.
Tools->Preferences->Show All Settings->Audio->Filters->Parametric Equalizer

Great job, dude! I was in trouble, but I'm not there already!
Thanks a lot you for sharing your experience, this superb forum for connecting people and Google for help to find useful stuff!

I can hear sound, I can click Youtube's "Pause" button because my cursor changes when hover invisible Flash button and I remember where it was before. But I still see white backgroung and no any...

I tried to tweak xorg.conf and discovered that I can successfully login after adding an option to Device section:

Option "NoAccel" "true"
That's a proof we are dealing with nVidia/VIA problem.
...

I'm using an old desktop with VIA VT8378 (KM400) S3 UniChrome.

I've done fresh installs of both Kubuntu and Ubuntu 10.04 on separate partitions, but experiencing this problem only with KDE....

Consider to try free Sakis3G. It requires Usb-ModeSwitch but everything goes automatically, except you have to provide PIN (and, may be, your operator).