This might be helpful, I tried using the brightness control buttons and found the following in syslog:
Sep 13 01:01:53 INK-201209-001 kernel: [ 2621.255802] ACPI Exception: AE_AML_BUFFER_LIMIT, Index (0x0000000000000010) is beyond end of object (20110623/exoparg2-418) Sep 13 01:01:53 INK-201209-001 kernel: [ 2621.255817] ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPCB.EC0_.VPC0.XCMD] (Node f7431570), AE_AML_BUFFER_LIMIT (20110623/psparse-536) Sep 13 01:01:53 INK-201209-001 kernel: [ 2621.255835] ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPCB.EC0_.VPC0.VPCW] (Node f7431558), AE_AML_BUFFER_LIMIT (20110623/psparse-536) Sep 13 01:02:53 INK-201209-001 kernel: [ 2681.278393] ACPI Exception: AE_AML_BUFFER_LIMIT, Index (0x0000000000000010) is beyond end of object (20110623/exoparg2-418) Sep 13 01:02:53 INK-201209-001 kernel: [ 2681.278407] ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPCB.EC0_.VPC0.XCMD] (Node f7431570), AE_AML_BUFFER_LIMIT (20110623/psparse-536) Sep 13 01:02:53 INK-201209-001 kernel: [ 2681.278424] ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPCB.EC0_.VPC0.VPCW] (Node f7431558), AE_AML_BUFFER_LIMIT (20110623/psparse-536) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/991539 Title: brightness control not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/991539/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
