This bug is still present on recent kernels on ubuntu vivid. I had to update aspire 5720z bios to 1.45 to solve the problem
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/209837 Title: [Acer Aspire 5720z] ACPI fan control problem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/209837/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs