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** Tags added: verification-needed-cosmic

** Tags added: verification-needed-bionic

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  Ethernet[10ec:8136] doesn't work after S3 with kernel

Status in HWE Next:
Status in OEM Priority Project:
Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Bionic:
  Fix Committed
Status in linux source package in Cosmic:
  Fix Committed

Bug description:
  The Ethernet works after S3 with kernel 4.15.0-33.36, and fails with kernel
  There is no interrupt while plug/unplug Ethernet cable after S3, so it looks 
like a regression after 4.15.0-33.36.

  Check changelog and found there are 2 commits introduced from 4.15.0-35.38 
might be suspicious
    * r8169 no internet after suspending (LP: #1779817)
      - r8169: don't use MSI-X on RTL8168g
      - r8169: don't use MSI-X on RTL8106e
  And check the upstream log and found the 2 MSI-X commits had been all 
reverted, since below commit claims it fixes the MSI-X interrupt issue which is 
already in Bionic kernel.
     083874549fdf PCI: Reprogram bridge prefetch registers on resume
  So, I reverted the 2 MSI-X commits and found the Ethernet works again after 

  [Regression Potential]
  Low, the 2 disable MSI-X commits are workarounds, and now we have proper way 
to fix the issue, so it should be fine to revert them.

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