I have installed Kamal's fixed kernel from: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/568611/comments/55
Just installing the kernel doesn't make any effect. During GRUB, after editing the 'linux...' line and appending 'acpi_backlight=vendor' the backlight works as expected. THANKS Kamal! Right now my Lenovo Ideapad Z360 laptop is operating at 11.4 W (due to reduced backlight). It's usually 16 W (minimum) up to a max of around 25 W. This fix will definitely save me a lot when I'm away from the AC outlet. Thanks a lot !!!!!!!! Some minor things though: * acpi_backlight=vendor shouldn't be required, however this workaround is MUCH better than not working at all.... * At first login my display was completely black. I thought the fix was not working (and I thought it made the computer unusable) until I pressed increased-brightness and it works. The thing is the brightness control works all the way until 0 (pitch dark). IMHO pitch dark shouldn't be allowed, because we already have the button work that (Fn+F2, which works very well), so the darkest brightness should be "a little bit brighter than pitch dark". * PLEASE make it into official Ubuntu kernel on next update -- Screen brightness control fails on Dell Studio 1558, Lenovo Ideapad Z360 https://bugs.launchpad.net/bugs/568611 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
