Carl Englund, thank you for reporting this and helping make Ubuntu better. This bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, please answer the following questions: + Could you please report the results following following https://wiki.ubuntu.com/Kernel/Debugging/Backlight ? + When you remove kernel parameter "acpi_backlight=vendor", what is the results of executing at the Terminal: ls /sys/class/backlight
+ With "acpi_backlight=vendor" added, what is the result of executing at the Terminal: ls /sys/class/backlight + If you boot with kernel parameter "acpi_osi=Linux" can you change your backlight? + Can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ . If it remains an issue, could you run the following command from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report. apport-collect -p linux <replace-with-bug-number> Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream- testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results. Thanks in advance. ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/882506 Title: Brightness control broken on Acer TimelineX 3820TG using Intel IGP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/882506/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
