@ 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 Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/994745 Title: Power indicator fails to recognise unplug To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/994745/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
