[Bug 1802689] Re: Upgrade to kmod (25-1ubuntu1.1) causes Lenovo x240 laptop to hang on boot

[AaronMa]

Tested on ThinkPad X240s:
ThinkPad BIOS GIET52WW (2.00 )
Lenovo ThinkPad X240s, model 3333333

Hang issue is not reproduced.

Loading i2c_i801 runtime  didn't cause any issue.
Booting with touchpad in smbus which using i2c_i801 module, Ubuntu 18.04 works fine, touchpad works fine.

Log attached.

Could you provide more details, like dmesg, call trace when system hang?

** Attachment added: "x240s-boot-i2c-rmi.log"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802689/+attachment/5221547/+files/x240s-boot-i2c-rmi.log

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Title:
  Upgrade to kmod (25-1ubuntu1.1) causes Lenovo x240 laptop to hang on
  boot

Status in kmod package in Ubuntu:
  Fix Released
Status in linux package in Ubuntu:
  Incomplete
Status in kmod source package in Xenial:
  Fix Committed
Status in linux source package in Xenial:
  Incomplete
Status in kmod source package in Bionic:
  Fix Committed
Status in linux source package in Bionic:
  Incomplete
Status in kmod source package in Cosmic:
  Fix Committed
Status in linux source package in Cosmic:
  Incomplete

Bug description:
  After upgrading my Lenovo x240 laptop to kmod (25-1ubuntu1.1), it
  hangs on boot.

  After blacklisting i2c_i801 everything works great again.

  I realize that this was a fix for bug 1786574, and that helps some
  other folks out.  I'm not sure what the right fix is but there's got
  to be something that works for everyone.

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