radeon - no video after leaving X

[jarek]

Hello!

I have installed Xorg (version 7.6) with radeon driver. It works fine,
but there is no video in text console After Ctrl+Alt+F1 monitors goes
off. Also after exit from X there is no video - system is still
operational, I can blindly start X again.
Before X text console works fine.
Chipset is Brazos with integrated Radeon 6310.

What can be wrong ?

Jarek
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