Public bug reported:
[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.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Medium
Status: Confirmed
** Affects: linux-oem-5.13 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-5.14 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Focal)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-5.13 (Ubuntu Focal)
Importance: Medium
Status: Confirmed
** Affects: linux-oem-5.14 (Ubuntu Focal)
Importance: Medium
Status: Confirmed
** Tags: oem-priority originate-from-1934257 somerville
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.13 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.14 (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Focal)
Status: New => Invalid
** Changed in: linux (Ubuntu)
Status: New => Confirmed
** Changed in: linux-oem-5.13 (Ubuntu)
Status: New => Invalid
** Changed in: linux-oem-5.14 (Ubuntu)
Status: New => Invalid
** Changed in: linux-oem-5.13 (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux-oem-5.14 (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux-oem-5.13 (Ubuntu Focal)
Importance: Undecided => Medium
** Changed in: linux-oem-5.14 (Ubuntu Focal)
Importance: Undecided => Medium
** Tags added: oem-priority originate-from-1934257 somerville
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https://bugs.launchpad.net/bugs/1942830
Title:
Fix sluggish r8169 by disaling ASPM L1.2
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