Thank you Joseph for your detailed information and help. Currently there is no rc7 image so i tested rc6 and it failed the tests.
Linux home 3.4.0-030400rc6-generic #201205061835 SMP Sun May 6 22:36:08 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux May 18 20:51:01 home kernel: [ 513.883742] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:01 home kernel: [ 513.883927] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:01 home kernel: [ 513.903695] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:01 home kernel: [ 513.903952] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:01 home kernel: [ 513.904131] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:01 home kernel: [ 513.904260] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:01 home kernel: [ 513.909176] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:01 home kernel: [ 513.927535] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:01 home kernel: [ 513.931549] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:01 home kernel: [ 513.931723] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:01 home kernel: [ 513.955703] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:01 home kernel: [ 513.955899] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:01 home kernel: [ 513.959873] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:01 home kernel: [ 513.960014] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:01 home kernel: [ 513.960553] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:01 home kernel: [ 513.979760] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:31 home kernel: [ 543.875155] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:31 home kernel: [ 543.899061] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) May 18 20:51:31 home kernel: [ 543.899215] ACPI Error: No installed handler for fixed event [0x00000000] (20120320/evevent-284) etc etc etc /Rob. ** Tags removed: needs-upstream-testing ** Tags added: kernel-bug-exists-upstream ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/996782 Title: ACPI Errors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/996782/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs