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[Kaarel <1486581@xxxxxxxxxxxxxxxxxx>]

I've booted up with the latest Ubuntu 15.04 kernel (3.19.0-26-generic)
and did some more testing, it seems that this bug is only present when I
do a "Safely remove" for the USB3 flash drive.

If I stick it in a USB3 port and just pull it out again, suspend works
fine.

Also, when I do a "Safely remove", but leave the flash drive in the
port, suspend breaks. I've attached /var/log/kern.log to this comment,
it contains wake-up - suspend - wake-up events.

Please tell me if more logs are needed

** Attachment added: "/var/log/kern.log"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486581/+attachment/4449922/+files/kern.log

** Description changed:

  I am using Ubuntu 15.04 with Mainline Kernel 4.2 RC7 on a Lenovo B5400
  laptop.
  
  When I plug an USB3 flash drive into either of the USB3 ports, then
  remove the flash drive and try to suspend (using the GUI), the computer
  will resume automatically from suspend in a second.
  
  The problem is not present when using a USB2 device in USB3 ports or when using a USB3 device in the USB2 port.
  If I do not remove the flash drive from the USB3 port suspend will work as expected.
  
  I've googled for this bug and found some guides in fixing a similar
  problem, but none of them worked.
  
  I'm not _sure_ what package is the cause of this problem, so acpid might
  be the wrong choice.
  
  Below is attached /proc/acpi/wakeup as suggested by the
  DebuggingKernelSuspend, please tell me if more information or logs are
  needed.
+ 
+ NB! Please read #3 for more information!!!

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https://bugs.launchpad.net/bugs/1486581

Title:
  Removed USB3 device from USB3 port causes S3 Resume to Fail

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I am using Ubuntu 15.04 with Mainline Kernel 4.2 RC7 on a Lenovo B5400
  laptop.

  When I plug an USB3 flash drive into either of the USB3 ports, then
  remove the flash drive and try to suspend (using the GUI), the
  computer will resume automatically from suspend in a second.

  The problem is not present when using a USB2 device in USB3 ports or when using a USB3 device in the USB2 port.
  If I do not remove the flash drive from the USB3 port suspend will work as expected.

  I've googled for this bug and found some guides in fixing a similar
  problem, but none of them worked.

  I'm not _sure_ what package is the cause of this problem, so acpid
  might be the wrong choice.

  Below is attached /proc/acpi/wakeup as suggested by the
  DebuggingKernelSuspend, please tell me if more information or logs are
  needed.

  NB! Please read #3 for more information!!!

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