I installed the RC9 and the daily 3.1 kernel. For some reason I was unable to do a normal boot (boot just freezes with new kernel just like in this bug report: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/856810). So I testet it in Safe-Mode (modprobe samsung-laptop, echo number > /sys/devices/platform/samsung/backlight/samsung/brightness ). Result: The driver is still broken. Here is a quote from Greg Kroah-Hartman who describes the bug: [quote] On some Samsung laptops the brightness regulation works slightly different. All SABI commands except for set_brightness work as expected. The behaviour of set_brightness is as follows:
- Setting a new brightness will only step one level toward the new brightness level. For example, setting a level of 5 when the current level is 2 will result in a brightness level of 3. - A spurious KEY_BRIGHTNESS_UP or KEY_BRIGHTNESS_DOWN event is also generated along with the change in brightness. - Neither of the above two issues occur when changing from/to brightness level 0. [/quote] The patch in #15 are two of his patches that fix the backlight bug here. (I patched samsung-laptop and did a diff against the original from linux-source) ** Tags removed: needs-upstream-testing -- 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
