Some progress: It looks like, there is problem with Xorg radeon driver shipped with Fedora 3. When I switch my Xorg to Vesa driver (disabled most of the extensions) problems disappeared! Can anyone with Radeon card (my is Radeon 7500 mobility) and Fedora Core 3 confirm this behavior? Thanks' -- This is an email sent via the webforum on http://fcp.homelinux.org