This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
focal' to 'verification-done-focal'. If the problem still exists, change
the tag 'verification-needed-focal' to 'verification-failed-focal'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-focal

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-5.14 in Ubuntu.
https://bugs.launchpad.net/bugs/1942830

Title:
  Fix sluggish r8169 by disaling ASPM L1.2

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  Confirmed
Status in linux-oem-5.13 package in Ubuntu:
  Invalid
Status in linux-oem-5.14 package in Ubuntu:
  Invalid
Status in linux source package in Focal:
  Invalid
Status in linux-oem-5.13 source package in Focal:
  Fix Committed
Status in linux-oem-5.14 source package in Focal:
  Confirmed

Bug description:
  [Impact]
  Realtek r8169 has abysmal network speed.

  [Fix]
  Disable ASPM L1.2 because the device takes a long time to exit from
  L1.2.

  [Test]
  Use `iperf` to test network speed.
  When ASPM L1.2 gets disabled, TX and RX and reach ~700Mbps and ~900Mbps
  respectively.

  [Where problems could occur]
  Disabling ASPM L1.2 can slightly increase power consumption. The CPU
  package C-State seems to be unaffected so the increase is rather minor.

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