I have Samsung NP-R530 laptop computer, did a clean install of Ubuntu "Oneiric Ocelot" a.k.a Ubuntu 11.10 and had the same issue until I added " acpi_backlight=vendor" to the kernel parameters. After doing that i ran the command "sudo update-grub" and rebooted my machine. Everything seems to be working normally now, no flickering and i can change backlight brightness with "FN + arrow keys (function keys to change backlight brightness) while running my computer on battery. 1) Type "sudo nano /etc/default/grub" (replace nano with your favourite text editor, if needed, e.g gedit) 2) Add "acpi_backlight=vendor" to the GRUB_CMDLINE_LINUX_DEFAULT parameters, so that... GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" ...or something similar becomes... GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor" 3) Close nano (CTRL+X) and save changes (Y) or save changes and close if using another kind of editor. 4) Type "sudo update-grub" to terminal 5) Type "sudo reboot" , after that your problem should be gone. Glad to share my experience and possibly help some other Ubuntu users.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/810093 Title: The new (2.6.39+) samsung_laptop kernel module causes serious backlight flickering - makes the desktop unusable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/810093/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
