contents of /sys/kernel/debug/usb/ehci/0000:00:1d.0/registers before unbinding the bus which triggers the freeze: bus pci, device 0000:00:1d.0 EHCI Host Controller EHCI 1.00, rh state suspended ownership 01000001 linux SMI sts/enable 0xe0000000 structural params 0x00200008 capability params 0x00036881 status 1000 Halt command 0010000 (park)=0 ithresh=1 period=1024 HALT intrenable 37 IAA FATAL PCD ERR INT uframe 0bbf port:1 status 601085 0 ACK POWER sig=se0 SUSPEND PE CONNECT port:2 status 501000 0 ACK POWER sig=se0 port:3 status 501000 0 ACK POWER sig=se0 port:4 status 501000 0 ACK POWER sig=se0 port:5 status 501000 0 ACK POWER sig=se0 port:6 status 501000 0 ACK POWER sig=se0 port:7 status 501000 0 ACK POWER sig=se0 port:8 status 501000 0 ACK POWER sig=se0 irq normal 18 err 0 iaa 8 (lost 0) complete 18 unlink 1
/sys/bus/pci/devices/0000:00:1d.0/power/control: on /sys/bus/pci/devices/0000:00:1d.0/power/runtime_status: active transcript of on-screen output when unbinding the EHCI USB bus: ehci-pci 0000:00:1d.0: remove, state 4 ehci-pci 0000:00:1d.0: roothub graceful disconnect usb usb3: USB disconnect, device number 1 usb 3-1: USB disconnect, device number 2 usb 3-1: ep 81: release intr @ 8+64 (1.0+256) [1/0 us] mask 0001 usb_remove_hcd: calling stop ehci_silence_controller: entry ehci_halt: entry ehci_halt: about to readl prematurely ehci_halt: premature readl returned 10000 ehci_halt: after first ehci_writel ehci_halt: before ehci_readl ** Attachment added: "dmesg from a 4.2 kernel with extra debug output, CONFIG_PM enabled" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1485057/+attachment/4469703/+files/dmesg-f.txt -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1485057 Title: "lsusb -v" as root freezes the kernel on Acer ES1-111; also freeze on shutdown Status in linux package in Ubuntu: Triaged Bug description: reproducible: always Steps to reproduce: - open a terminal - sudo bash - lsusb -v In a virtual terminal, the command prints the name of the first device it finds, then the system freezes completely. In a terminal of the desktop, I don't even get the name of the device, the system freezes immediately. Either way, I have to power off the machine. There is no kernel oops. Nothing is written to the log. The magic sysreq key yields no response, although I have verified that it works before triggering the freeze. I've narrowed down the problem by calling "lsusb -v -s <device>". The system freezes on both devices of bus 3 (003:001 and 003:002). For all other devices, it prints the expected output and continues to work. When calling lsusb as a regular user, I get "Couldn't open device, some information will be missing", then the regular output, and the system keeps running. Therefore I assume that the problem is somewhere in the kernel, when the devices are accessed. This is a regression. It used to work in 14.10, and fails to work since 15.04. It also used to work in 14.04.2, and fails in 14.04.3. It fails with mainline builds 4.2.0-rc6-unstable, 4.2.0-rc2-unstable, 4.1.0-rc2-vivid. (yeah, I've been trying for a while :-) Incidentally, the shutdown sequence also freezes with the kernels that exhibit the problem; but I cannot be sure that the cause is the same. I decided to first chase the USB freeze, because it was easier to gather information about that. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: linux-image-3.19.0-25-generic 3.19.0-25.26 ProcVersionSignature: Ubuntu 3.19.0-25.26-generic 3.19.8-ckt2 Uname: Linux 3.19.0-25-generic x86_64 ApportVersion: 2.17.2-0ubuntu1.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: rweber 1525 F.... pulseaudio CurrentDesktop: XFCE Date: Fri Aug 14 18:38:36 2015 HibernationDevice: RESUME=UUID=8a45266d-0232-428e-bb25-113d23caaf8a InstallationDate: Installed on 2015-06-28 (46 days ago) InstallationMedia: Xubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) MachineType: Acer Aspire ES1-111M ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-25-generic root=UUID=b8872e03-7295-4cbd-ac86-06b9be2f112f ro quiet splash crashkernel=384M-:128M vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.19.0-25-generic N/A linux-backports-modules-3.19.0-25-generic N/A linux-firmware 1.143.3 SourcePackage: linux UpgradeStatus: Upgraded to vivid on 2015-07-05 (39 days ago) dmi.bios.date: 08/20/2014 dmi.bios.vendor: Insyde Corp. dmi.bios.version: V1.08 dmi.board.asset.tag: Type2 - Board Asset Tag dmi.board.name: R2 dmi.board.vendor: Acer dmi.board.version: Type2 - A01 Board Version dmi.chassis.type: 10 dmi.chassis.vendor: Chassis Manufacturer dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.08:bd08/20/2014:svnAcer:pnAspireES1-111M:pvrV1.08:rvnAcer:rnR2:rvrType2-A01BoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion: dmi.product.name: Aspire ES1-111M dmi.product.version: V1.08 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1485057/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
