Sorry I've been neglecting this (and my original report may have fluffed the detail).
This is Windows 8 hardware. Manually poking the intel_backlight driver in sysfs (echo 100 | sudo tee /sys/class/intel_backlight/brightness) works fine. So for now I'm assuming the problem is what's referred to here: http://permalink.gmane.org/gmane.linux.kernel.commits.head/396675 (I first saw this referred to when it was reverted in 3.11-rc3. Linus' release announcement says "But never fear, we have top people looking at it"). That should be nice & easy to test compared to the _other_ bug I'm tracking on this laptop. So I'll see if I can get there & feedback to upstream. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1173725 Title: [Acer Aspire V5-171] Backlight cannot be adjusted unless passing acpi_backlight=vendor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1173725/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
