After upgrading to Jaunty (9.04), the problem persists. Even more troubling now, since starting with Jaunty my graphic chip (RS690M) is not supported by the proprietary fglrx driver any more :(
Current workaround: after logging in, switch once to the console screen (Ctrl+Alt+F1), then switch back to the Xserver (Ctrl+Alt+F7). After that procedure, the blanking is gone, but has to be repeated whenever I log in.
After upgrading to Jaunty (9.04), the problem persists. Even more troubling now, since starting with Jaunty my graphic chip (RS690M) is not supported by the proprietary fglrx driver any more :(
Current workaround: after logging in, switch once to the console screen (Ctrl+Alt+F1), then switch back to the Xserver (Ctrl+Alt+F7). After that procedure, the blanking is gone, but has to be repeated whenever I log in.