Public bug reported:
[Impact]
Once r8169 (Realtek ethernet) and its root port enter to D3, plugging
network cable doesn't wake r8169 up.
[Fix]
Revert "PCI/PME: Implement runtime PM callbacks".
Quote the original commit message:
"
The commit tried to prevent root port waking up from D3cold immediately but
looks like disabing root port PME interrupt is not the right way to fix
that issue so revert it now. The patch following proposes an alternative
solution to that issue.
"
[Test]
After applying the fix, plugging the ethernet cable can generate PME IRQ
correctly, hence waking up r8169.
[Regression Potential]
Medium. The commits are relative new, rely on some PCI detail that I am
not familiar with (PCI spec isn't publicly available).
Fortunately we only need this fix for Unstable/OEM-B, so it won't hit
most users if any regression happens.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Affects: linux-oem (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: Won't Fix
** Affects: linux-oem (Ubuntu Bionic)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Disco)
Importance: Undecided
Status: Incomplete
** Affects: linux-oem (Ubuntu Disco)
Importance: Undecided
Status: Won't Fix
** Tags: originate-from-1812193 somerville
** Also affects: linux-oem (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Disco)
Importance: Undecided
Status: New
** Also affects: linux-oem (Ubuntu Disco)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux-oem (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux-oem (Ubuntu Disco)
Status: New => Won't Fix
** Changed in: linux (Ubuntu Bionic)
Status: New => Won't Fix
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https://bugs.launchpad.net/bugs/1817676
Title:
r8169 doesn't get woken up by ethernet cable plugging, no PME
generated
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