Problem with 4850 after 11.6b

Discussion created by nijiko on Oct 1, 2011
Screen flickering serious!

4850, not X2, after installing 11.6b (hotfix) through 11.9 (newest stable release), will screen flicker frequently.

Versions before 11.6 (contains 11.6 stable) have not this problem.

Any possible to fix it?

PS:My videocard is a public PCB version.