@ Jack: Read "How to Add a Kernel Boot Parameter" (https://wiki.ubuntu.com/Kernel/KernelBootParameters) and make sure you added the boot parameter correctly.
As mentioned here (https://www.kernel.org/doc/Documentation/kernel- parameters.txt) the kernel boot parameter acpi_osi is ment to "Modify list of supported OS interface strings"; with acpi_osi= we disable all strings. Instead of disabling all strings I tried to remove single strings from the list and found out that acpi_osi="!Windows 2009" solves the problem for me. As I understand it, the Linux kernel tells BIOS that its ACPI- implementation is compatible with the one of Windows 7, but this doesn't seem to be completely true (at least as long as the available patch isn't applied). I don't know why this workaround shouldn't work for you (while it works for other submodels). BTW, does the patch provided in the upstream bug report solve the problem for you? -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to upower in Ubuntu. https://bugs.launchpad.net/bugs/994745 Title: Power indicator fails to recognise unplug Status in The Linux Kernel: In Progress Status in Upower: Confirmed Status in “linux” package in Ubuntu: Confirmed Status in “upower” package in Ubuntu: Confirmed Status in “linux” package in Debian: Confirmed Bug description: Upon unplugging the power on HP Folio 13 running Precise the power indicator fails to recognise the unplug. The charging laptop symbol remains. Power-statistics also becomes unresponsive/empty of data. Powertop recognises the unplug, but Jupiter which I have installed does not. If I suspend and resume or restart, the fact that I am on battery power is once again recognised. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: indicator-power 2.0-0ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-24.38-generic 3.2.16 Uname: Linux 3.2.0-24-generic x86_64 ApportVersion: 2.0.1-0ubuntu7 Architecture: amd64 Date: Fri May 4 11:00:11 2012 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301) ProcEnviron: LANGUAGE=en_CA:en TERM=xterm PATH=(custom, user) LANG=en_CA.UTF-8 SHELL=/bin/bash SourcePackage: indicator-power UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/994745/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
