Christopher, that issue already existed in kernel 4.2 ; sorry for my previous misleading comment.
I did install and boot several older kernels (namely, mainlines 4.3, 4.2, 4.0, 3.19 and 3.13) , but had the same problem with all of them. On older kernels, though, I get an error message similar to this at shutdown: 32.250495] usb 3-1: device not accepting address 3, error -110 42.823143] usb 3-1: device not accepting address 4, error -110 53.395791] usb 3-1: device not accepting address 5, error -110 53.552058] usb usb3-port1: unable to enumerate USB device 53.552058] reboot: System halted Back to kernel 4.9, looking at dmesg in detail (see attachment), I noticed the following (1) [ 0.000000] DMI: LENOVO F0AN/INVALID, BIOS O00KT19AUS 09/30/2014 (2) [ 0.002774] ACPI Error: [_SB_.PCI0.XHC_.RHUB.SSP3] Namespace lookup failure, AE_NOT_FOUND (20160831/dswload-210) [ 0.002782] ACPI Exception: AE_NOT_FOUND, During name lookup/catalog (20160831/psobject-227) [ 0.002927] ACPI Exception: AE_NOT_FOUND, [DSDT] table load failed (20160831/tbxfload-198) [ 0.003270] ACPI Error: [\_PR_.CPU0] Namespace lookup failure, AE_NOT_FOUND (20160831/dswload-210) (several similar errors follow) (3) [ 0.069971] DMAR-IR: [Firmware Bug]: ioapic 0 has no mapping iommu, interrupt remapping will be disabled (4) [ 0.404344] ACPI Error: [PCHS] Namespace lookup failure, AE_NOT_FOUND (20160831/psargs-359) [ 0.404354] ACPI Error: Method parse/execution failed [\] (Node ffffffffa0415920), AE_NOT_FOUND (20160831/psparse-543) (several similar errors follow) [ 0.405105] ACPI: Using PIC for interrupt routing [ 0.405114] PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem 0xe0000000-0xefffffff] (base 0xe0000000) [ 0.405146] [Firmware Info]: PCI: MMCONFIG at [mem 0xe0000000-0xefffffff] not reserved in ACPI motherboard resources [ 0.405147] PCI: not using MMCONFIG [ 0.405148] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug (5) [ 0.963786] DMAR: Failed to find handle for ACPI object \_SB.PCI0.I2C0 [ 0.963792] DMAR: Failed to find handle for ACPI object \_SB.PCI0.I2C1 [ 0.963795] DMAR: Failed to find handle for ACPI object \_SB.PCI0.UA01 [ 0.963798] DMAR: Failed to find handle for ACPI object \_SB.PCI0.SDHC [ 0.963810] PCI-DMA: Using software bounce buffering for IO (SWIOTLB) (6) [ 1.263487] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0 [ 1.263489] ACPI: Power Button [PWRF] [ 1.263545] GHES: HEST is not enabled! (1) and (3) let me think that this might be a firmware problem (but then, how come the same hardware and BIOS work properly with Windows? could it related to enabling/disabling UEFI, e.g., "csm mode" in Lenovo verbiage ?) (2), (4) and (5) are symptoms of ACPI failure; I found several old tickets where the same error appears, such as: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/668148 https://bugs.launchpad.net/ubuntu/+source/acpi/+bug/551654 http://askubuntu.com/questions/624447/cannot-boot-14-04-ubuntu https://bugzilla.kernel.org/show_bug.cgi?id=43229 (6) I don't know what GHES and HEST mean, some other tickets have been opened and it looks like this is not a bug, but a feature: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1170298 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1091032 Do you need other information ? Can I help in some way ? ** Bug watch added: Linux Kernel Bug Tracker #43229 http://bugzilla.kernel.org/show_bug.cgi?id=43229 ** Attachment added: "dmesg.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1651294/+attachment/4795038/+files/dmesg.txt ** Tags removed: needs-bisect ** 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/1651294 Title: [Lenovo IdeaCentre A540] Doesn't poweroff on shutdown To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1651294/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
