I am having the a similar problem with a Compaq Presario V5000, ATI Radeon 200M graphics and the open source drivers: changing the power management or screensaver options just blanks the screen.
However both "xset dpms force off" and "sudo vbetool dpms off" turn off the backlight for me. -- [jaunty] dpms does not switch off backlight on laptop screen https://bugs.launchpad.net/bugs/363059 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
