black screen death after nv driver
 

yet another strange bug for nvidia driver

x server started with nvidia on display 0 - ok
switching to text mode into another tty - ok
starting x server with nv driver on display 1 - ok
stoping x server with nv driver on display 1 and returning into text mode - ok
switching bach to x server on display 0 - black screen of death
but system continues to work... (sound continues to play for a long time... )

nvidia - 6111, agp turned off.