A workaround has been found, and confirmed to work. After booting into the OS, running this command in the terminal activates the back light.
$ sudo setpci -s 00:02.0 F4.B=0 Unfortunately this command must be run after every boot. When resuming from suspend, the back light does not return. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/826386 Title: No backlight display Acer Aspire 5734Z To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/826386/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
