This original issue affected my laptop (NP-QX410; not a Series 900), although perhaps a different behavior.
Prior to 3.2.0-27.43, the samsung-laptop module has never loaded for me. I lived without rfkill, etc. To get brightness controls working, I had been booting with 'acpi_backlight=vendor'. This left me with only an 'intel_backlight' symlink in /sys/class/backlight (-> ../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight/). When samsung-laptop started loading, it added an additional samsung link here and seemed to become the target for dimming and brightness operations. With samsung-laptop loaded, adjusting the brightness (i.e. via Fn-key combinations) did not allow me to achieve the same brightness range that intel_backlight provided. I couldn't get more than ~30% of maximum brightness. Attempting to increase the brightness past this point just results in flickering. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1028151 Title: Samsung Series 900 Laptop brightness control issue To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1028151/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
