Public bug reported: I've started to see this error during otherwise-normal system operation since one of the recent kernel updates. Earlier Intrepid 2.6.27 kernels did not show this error. It is followed by several more messages whose meaning is unclear to me:
Oct 15 10:28:08 perseus kernel: [84629.621056] ACPI: EC: missing confirmations, switch off interrupt mode. Oct 15 10:28:09 perseus kernel: [84630.126650] ACPI Exception (evregion-0419): AE_TIME, Returned by Handler for [EmbeddedControl] [20080609] Oct 15 10:28:09 perseus kernel: [84630.126684] ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.PCI0.LPC_.EC__.LPMD] (Node ffff8800bde3b0e0), AE_TIME Oct 15 10:28:09 perseus kernel: [84630.126859] ACPI Error (psparse-0530): Method parse/execution failed [\_PR_.CPU0._PPC] (Node ffff8800bd424ec0), AE_TIME Oct 15 10:28:09 perseus kernel: [84630.127004] ACPI Error (psparse-0530): Method parse/execution failed [\_PR_.CPU1._PPC] (Node ffff8800bd424e00), AE_TIME Oct 15 10:28:09 perseus kernel: [84630.127153] ACPI Exception (processor_perflib-0145): AE_TIME, Evaluating _PPC [20080609] Older logs show it has been happening since approximately 23 September: /var/log/kern.log:Oct 15 10:28:08 perseus kernel: [84629.621056] ACPI: EC: missing confirmations, switch off interrupt mode. /var/log/kern.log:Oct 15 14:12:01 perseus kernel: [ 3511.400181] ACPI: EC: missing confirmations, switch off interrupt mode. /var/log/kern.log.0:Oct 12 20:47:28 perseus kernel: [26085.852122] ACPI: EC: missing confirmations, switch off interrupt mode. /var/log/kern.log.2.gz:Oct 4 11:11:05 perseus kernel: [ 4705.258302] ACPI: EC: missing confirmations, switch off interrupt mode. /var/log/kern.log.3.gz:Sep 23 23:31:17 perseus kernel: [36071.180038] ACPI: EC: missing confirmations, switch off interrupt mode. There is also an independent confirmation of this sequence of messages in this comment on an unrelated bug: https://bugs.edge.launchpad.net/ubuntu/+source/cups/+bug/254022/comments/9 ProblemType: Bug Architecture: amd64 DistroRelease: Ubuntu 8.10 Package: linux-image-2.6.27-7-generic 2.6.27-7.11 [modified: lib/modules/2.6.27-7-generic/modules.pcimap lib/modules/2.6.27-7-generic/modules.dep lib/modules/2.6.27-7-generic/modules.ieee1394map lib/modules/2.6.27-7-generic/modules.usbmap lib/modules/2.6.27-7-generic/modules.isapnpmap lib/modules/2.6.27-7-generic/modules.inputmap lib/modules/2.6.27-7-generic/modules.seriomap lib/modules/2.6.27-7-generic/modules.alias lib/modules/2.6.27-7-generic/modules.symbols] ProcCmdLine: root=UUID=305dde78-d20a-4248-aaf4-09447b7c5791 ro quiet splash ProcEnviron: LC_COLLATE=C PATH=/home/username/bin:/usr/lib/ccache:/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/sbin:/usr/sbin:/usr/games:/usr/lib/surfraw LANG=en_US.UTF-8 SHELL=/bin/zsh ProcVersionSignature: Ubuntu 2.6.27-7.11-generic SourcePackage: linux ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug -- ACPI: EC: missing confirmations, switch off interrupt mode. https://bugs.launchpad.net/bugs/284263 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
