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[Marcin <marcincelebucki@xxxxxxxxx>]

** Tags added: wily

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https://bugs.launchpad.net/bugs/1526537

Title:
  blk_update_request: I/O error

Status in linux package in Ubuntu:
  New

Bug description:
  
  On my laptop I am using the ubuntu in persistent mode with a backing files: casper-rw, home-rw. For some time in the new editions of ubuntu [ 15.04 / 15.10 / 16.04 daily (15.12) ] I meet with error: blk_update_request: I/O error, dev loop ... , sector ... .  am sure it is not a hardware problem. Please, could you try reproduce this issue 

  `/proc/cmdline`

  BOOT_IMAGE=/Ubuntu/16.04/desktop-amd64/casper/vmlinuz.efi append
  noprompt boot=casper intel_iommu=on toram showmounts persistent-
  path=/Ubuntu/16.04/desktop-amd64 persistent iso-
  scan/filename=/Ubuntu/16.04/xenial-desktop-amd64.iso cdrom-detect/try-
  usb=true

  `kern.log`

  Dec 15 21:49:25 ThinkPad kernel: [   11.507021] Bluetooth: BNEP socket layer initialized
  Dec 15 21:49:25 ThinkPad kernel: [   11.513208] blk_update_request: I/O error, dev loop0, sector 1376280
  Dec 15 21:49:25 ThinkPad kernel: [   11.544996] blk_update_request: I/O error, dev loop0, sector 1364008
  Dec 15 21:49:26 ThinkPad kernel: [   11.655626] IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not ready
  Dec 15 21:49:26 ThinkPad kernel: [   11.656563] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready
  Dec 15 21:49:26 ThinkPad kernel: [   11.884604] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready
  Dec 15 21:49:26 ThinkPad kernel: [   12.080950] usbcore: registered new interface driver cdc_wdm
  Dec 15 21:49:26 ThinkPad kernel: [   12.089352] qmi_wwan 2-1.4:1.0: cdc-wdm0: USB WDM device
  Dec 15 21:49:26 ThinkPad kernel: [   12.089629] qmi_wwan 2-1.4:1.0 wwan0: register 'qmi_wwan' at usb-0000:00:1d.0-1.4, WWAN/QMI device, 86:f3:f1:57:ac:04
  Dec 15 21:49:26 ThinkPad kernel: [   12.089851] usbcore: registered new interface driver qmi_wwan
  Dec 15 21:49:27 ThinkPad kernel: [   13.014113] blk_update_request: I/O error, dev loop2, sector 776360
  Dec 15 21:49:27 ThinkPad kernel: [   13.026856] blk_update_request: I/O error, dev loop2, sector 777792
  Dec 15 21:49:27 ThinkPad kernel: [   13.406901] e1000e: enp0s25 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
  Dec 15 21:49:27 ThinkPad kernel: [   13.406909] e1000e 0000:00:19.0 enp0s25: 10/100 speed: disabling TSO
  Dec 15 21:49:27 ThinkPad kernel: [   13.406948] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s25: link becomes ready
  Dec 15 21:49:27 ThinkPad kernel: [   13.411598] blk_update_request: I/O error, dev loop0, sector 1364024
  Dec 15 21:49:27 ThinkPad kernel: [   13.525480] blk_update_request: I/O error, dev loop2, sector 778064
  Dec 15 21:49:28 ThinkPad kernel: [   13.733896] Bluetooth: RFCOMM TTY layer initialized
  Dec 15 21:49:28 ThinkPad kernel: [   13.733906] Bluetooth: RFCOMM socket layer initialized
  Dec 15 21:49:28 ThinkPad kernel: [   13.733912] Bluetooth: RFCOMM ver 1.11
  Dec 15 21:49:28 ThinkPad kernel: [   13.758583] blk_update_request: I/O error, dev loop0, sector 1360048
  Dec 15 21:49:28 ThinkPad kernel: [   13.765377] blk_update_request: I/O error, dev loop0, sector 1364032
  Dec 15 21:49:28 ThinkPad kernel: [   13.778920] blk_update_request: I/O error, dev loop0, sector 1364040
  Dec 15 21:49:28 ThinkPad kernel: [   13.785037] blk_update_request: I/O error, dev loop0, sector 1364048
  Dec 15 21:49:28 ThinkPad gnome-session-binary[3083]: Entering running state
  Dec 15 21:49:37 ThinkPad kernel: [   22.759620] blk_update_request: 15 callbacks suppressed
  Dec 15 21:49:37 ThinkPad kernel: [   22.759623] blk_update_request: I/O error, dev loop0, sector 1364072
  Dec 15 21:49:37 ThinkPad kernel: [   22.803618] hidraw: raw HID events driver (C) Jiri Kosina
  Dec 15 21:49:37 ThinkPad kernel: [   22.806751] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
  Dec 15 21:49:37 ThinkPad kernel: [   22.806758] Bluetooth: HIDP socket layer initialized
  Dec 15 21:49:37 ThinkPad kernel: [   22.811095] hid-generic 0005:0D62:01BF.0001: unknown main item tag 0x0
  Dec 15 21:49:37 ThinkPad kernel: [   22.811211] input: Bluetooth Mouse as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.4/1-1.4:1.0/bluetooth/hci0/hci0:11/0005:0D62:01BF.0001/input/input17
  Dec 15 21:49:37 ThinkPad kernel: [   22.811384] hid-generic 0005:0D62:01BF.0001: input,hidraw0: BLUETOOTH HID v1.39 Mouse [ Bluetooth Mouse] on ec:55:f9:fa:c6:1d
  Dec 15 21:50:41 ThinkPad kernel: [   86.683594] blk_update_request: I/O error, dev loop2, sector 2343552
  Dec 15 21:50:41 ThinkPad kernel: [   86.690626] blk_update_request: I/O error, dev loop2, sector 2339064
  Dec 15 21:50:41 ThinkPad kernel: [   86.703606] blk_update_request: I/O error, dev loop2, sector 2057600
  Dec 15 21:50:41 ThinkPad kernel: [   86.713265] blk_update_request: I/O error, dev loop2, sector 2343592
  Dec 15 21:50:41 ThinkPad kernel: [   86.715556] blk_update_request: I/O error, dev loop2, sector 2057608
  Dec 15 21:50:41 ThinkPad kernel: [   86.861531] blk_update_request: I/O error, dev loop2, sector 2339104
  Dec 15 21:50:42 ThinkPad kernel: [   87.954169] blk_update_request: I/O error, dev loop2, sector 2343632

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