Hi Rosca Stefan, are you still experiencing this bug? You mentioned a few reboots cleared it, but is it a recurring problem that just shows itself once and a while?
avivotool can be used to assist in debugging this issue. avivotool is provided with the radeontool package, so to install it run: sudo apt-get install radeontool After installing it, you run it like this: avivotool regs all > regdump_good.txt avivotool regs all > regdump_broke.txt Run it two times. Once when you have a working screen (for any driver), and once in the broken case (either from the tty console or logged into the sick box remotely). Attach both of those to this bug report, and we can then forward this issue upstream. Thanks ahead of time! ** Changed in: xserver-xorg-video-ati (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in ubuntu. https://bugs.launchpad.net/bugs/687445 Title: The strange white lines appeared on the top of screen _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp