Fujitsu U7311 I219-LM wired onboard slow RX speeds

[Daniel Barta]

Hello, i am having problem with very low RX speeds on my Fujitsu U7130 laptop's wired network with Intel I219-LM chip. When i start downloading any larger content, the speed is very low (ranging from 150kbps-6Mbps) or even the transfer completely stops. RX_errors are rising as well as rx_crc_errors when checking with "ethtool -S enp0s31f6". Link speed is auto-negotiated to 1000Mbps and lowering the speed manually is not having any effects on this issue. Wired TX speeds seems to be unaffected. Wireless speeds on the AX201 are as expected too.

I did try to solve this problem upgrading from Ubuntu 20.04 to 21.04 and using various kernels (5.8, 5.10, 5.11, 5.12.9). I also tried to compile e1000e driver from sourceforge version 3.8.7 (https://sourceforge.net/projects/e1000/) with no joy.

Bug #1927925 seems to be related as the behavior is the same, but in this case booting with kernel parameter "intel_idle.max_cstate=1" will not resolve the issue.

lsb_release -rd
Description: Ubuntu 21.04
Release: 21.04

uname -a
Linux IO 5.11.0-18-generic #19-Ubuntu SMP Fri May 7 14:22:03 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

apt-cache policy linux-image-5.11.0-18-generic
linux-image-5.11.0-18-generic:
  Installed: 5.11.0-18.19
  Candidate: 5.11.0-18.19
  Version table:
 *** 5.11.0-18.19 500
        500 http://cz.archive.ubuntu.com/ubuntu hirsute-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu hirsute-security/main amd64 Packages
        100 /var/lib/dpkg/status

Thank you.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: lk7r 2095 F.... pulseaudio
 /dev/snd/controlC0: lk7r 2095 F.... pulseaudio
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 21.04
InstallationDate: Installed on 2021-05-23 (17 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
MachineType: FUJITSU CLIENT COMPUTING LIMITED LIFEBOOK U7311
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-18-generic root=UUID=b9466f2a-0840-40f4-8131-9b64200e5618 ro intel_idle.max_cstate=1 quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.11.0-18.19-generic 5.11.17
RelatedPackageVersions:
 linux-restricted-modules-5.11.0-18-generic N/A
 linux-backports-modules-5.11.0-18-generic N/A
 linux-firmware 1.197
Tags: wayland-session hirsute
Uname: Linux 5.11.0-18-generic x86_64
UpgradeStatus: Upgraded to hirsute on 2021-06-08 (1 days ago)
UserGroups: adm cdrom dialout dip lpadmin lxd plugdev sambashare sudo video
_MarkForUpload: True
dmi.bios.date: 04/20/2021
dmi.bios.release: 2.14
dmi.bios.vendor: FUJITSU CLIENT COMPUTING LIMITED
dmi.bios.version: Version 2.14
dmi.board.name: FJNB2E7
dmi.board.vendor: FUJITSU CLIENT COMPUTING LIMITED
dmi.board.version: A3
dmi.chassis.type: 10
dmi.chassis.vendor: FUJITSU CLIENT COMPUTING LIMITED
dmi.chassis.version: LIFEBOOK U7311
dmi.modalias: dmi:bvnFUJITSUCLIENTCOMPUTINGLIMITED:bvrVersion2.14:bd04/20/2021:br2.14:svnFUJITSUCLIENTCOMPUTINGLIMITED:pnLIFEBOOKU7311:pvr10601736746:rvnFUJITSUCLIENTCOMPUTINGLIMITED:rnFJNB2E7:rvrA3:cvnFUJITSUCLIENTCOMPUTINGLIMITED:ct10:cvrLIFEBOOKU7311:
dmi.product.family: LIFEBOOK-FTS
dmi.product.name: LIFEBOOK U7311
dmi.product.sku: SK01
dmi.product.version: 10601736746
dmi.sys.vendor: FUJITSU CLIENT COMPUTING LIMITED

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1931442/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Daniel Barta (lk7r)]

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[Daniel Barta (lk7r)]

I have found workaround to get LAN working. On Ubuntu kernel 5.11.0-18-generic if i boot up system and log in - LAN is not working correctly - CRC errors etc. If laptop is put into hibernate (save to swap partition), then turned on and system state restored from hibernation, LAN adapter is working as expected without any errors. Confused...

[Kai-Heng Feng (kaihengfeng)]

Can you please attach full dmesg after the issue is workaround by hibernation resume?

[Daniel Barta (lk7r)]

Here is dmesg after resume from disk hibernation.

[Kai-Heng Feng (kaihengfeng)]

Please test this kernel:
https://people.canonical.com/~khfeng/lp1931442/

[Daniel Barta (lk7r)]

Hello Kai-Heng,

i have tested provided kernel and it still suffers from slow speed. Also noticed, that if i run iperf3 multiple times, it works in one-two passes and then it slows down to crawl. Then again on the next pass it works as expected. Please see attached outputs.

[Daniel Barta (lk7r)]

After doing hibernation "trick" iperf3 is working fine every time.

[Daniel Barta (lk7r)]

Here is dmesg after hibernation with 5.13.0 kernel you have provided.

[Kai-Heng Feng (kaihengfeng)]

Thanks, please give this kernel a try:
https://people.canonical.com/~khfeng/lp1931442-2/

[Daniel Barta (lk7r)]

Hi, it is the same as with the previous kernel 5.13.0-1004. Also since 5.13.x touchpad stopped working (using i2c_hid module). Iperf and dmesg attached. Thank you.

[Kai-Heng Feng (kaihengfeng)]

Does changing MTU help?

[Daniel Barta (lk7r)]

No it does not, tried to go from 1500 to 9000 and then to 1300 and 1000. No change at all. Only if i start TX from the LAN interface, then RX is working as expected. As soon as TX stops, RX comes to crawl. I have attached iper3 log to show this. The times when speed is in MBits is when i started iperf3 on another port in TX direction from laptop. Thank you.

[Kai-Heng Feng (kaihengfeng)]

Please give this kernel a test:
https://people.canonical.com/~khfeng/lp1931442-3/

[Daniel Barta (lk7r)]

Hi, dmesg attached, no change.

[Kai-Heng Feng (kaihengfeng)]

Instead of hibernate, does suspend help?

[Daniel Barta (lk7r)]

Hi, no suspend does not help. Tested with your 5.13.0-3004 kernel and 5.11.0-22-generic. Dmesg attached.

[Kai-Heng Feng (kaihengfeng)]

Thanks. Please give this a try:
https://people.canonical.com/~khfeng/lp1931442-4/

[Daniel Barta (lk7r)]

Hi, problem still persist. Dmesg attached. Thank you.

[Kai-Heng Feng (kaihengfeng)]

Daniel, please test this kernel:
https://people.canonical.com/~khfeng/e1000e-me-workaround/

[Daniel Barta (lk7r)]

Hi, I am sorry to report that this kernel is not fixing the issue. Still the same behavior, once computer goes trough hibernation cycle, everything works. Dmesg attached. Thank you.

[Kai-Heng Feng (kaihengfeng)]

This one should work:
https://people.canonical.com/~khfeng/lp1927925-e1000e-device-links/

[Daniel Barta (lk7r)]

Hi Kai-Heng,
this kernel fixes the issue. Thank you! Now i have to fix touchpad that is not working under 5.13.x :-D.