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 Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1485057 Title: "lsusb -v" as root freezes the kernel on Acer ES1-111; also freeze on shutdown To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1485057/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
