The line does'not present in BIOS POST and GRUB, but is present in console and graphics mode. My bug is not like this one https://bugs.freedesktop.org/show_bug.cgi?id=23384 because the stripe is at the left side, not the right side Linux 2.6.34-gentoo SMP PREEMPT x11-drivers/xf86-video-ati-6.13.0 x11-base/xorg-server-1.8.1.901 USE="ipv6 nptl udev xorg" media-libs/mesa-7.8.1 USE="nptl xcb" VIDEO_CARDS="radeon"
Created attachment 235699 [details] /var/log/Xorg.0.log
Created attachment 235701 [details] /etc/X11/xorg.conf
Created attachment 235703 [details] /usr/src/linux/.config
It can be a hardware problem. Test your video card with other distributions and operating systems to exclude hardware problems. You can also try to connect your monitor to another video output if your card have more than one.
(In reply to comment #4) > It can be a hardware problem. No, because Windows Vista Home Premium works ok on the same hardware. Also I tried Linux with another (shorter) cable and another monitor - the stripe still here