[RTL810xE] No ethernet connection

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Still having issues even after update to 5.4.0-24 today. found a work around by downloading latest driver from realtek here https://www.realtek.com/en/component/zoo/category/network-interface-controllers-10-100m-fast-ethernet-pci-express-software. followed directions from here with latest drivers https://github.com/ghostrider-reborn/realtek-r8101-linux-driver.

[ 6.706478] libphy: r8169: probed
[ 6.706483] r8169 0000:05:00.0: realtek.ko not loaded, maybe it needs to be added to initramfs?
[ 6.713626] r8169: probe of 0000:05:00.0 failed with error -49

$ modinfo r8169
...
softdep: pre: realtek

So does it work for you if you add realtek to your /etc/modules?

  $ echo realtek | sudo tee -a /etc/modules
  $ sudo update-initramfs -u -k all && sudo reboot

Yes, adding realtek to /etc/modules makes the ethernet work. I'm not sure if thats the actual bug.

$ systemd-analyze
Startup finished in 9.434s (firmware) + 4.866s (loader) + 3min 22.039s (kernel) + 56.143s (userspace) = 4min 32.483s
graphical.target reached after 55.830s in userspace

System log still has a lot of errors:
Initramfs unpacking failed: Decoding failed
Buffer I/O error on dev sr0, logical block 524284, async page read
do_IRQ: 1.55 No irq handler for vector

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1871182

Status changed to 'Confirmed' because the bug affects multiple users.

@Ryan, those error messages are irrelevant here.

Could you try to:
1. remove 'realtek' from your /etc/modules temporarily
2. run `sudo update-initramfs -v -u` and attach the output messages
3. run `unmkinitramfs /boot/initrd.img-$(uname -r) some_temp_folder && find some_temp_folder -name realtek.ko` and check if realtek.ko is packed.
4. if it doesn't appear in the extracted folder, you may want to redo comment #4 to add it back after these experiments.

The result from my side is positive, but maybe for some reason realtek.ko was not included automatically for you.

Possibly related? https://bugzilla.kernel.org/show_bug.cgi?id=204343

After doing some research I'm quite sure that this bug was introduced by [1] in the 5.4.29 mainline kernel and the 5.4.0-22.26 ubuntu kernel.
The bug was already fixed by [2] in the 5.4.32 mainline kernel. At least that's the case on my machine [3] and Heiner Kallweit also pointed in this direction [4].
The only thing that doesn't fit in this picture is that adding realtek to /etc/modules fixed the problem for Ryan. But it didn't fix the problem for me.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.4.32&id=791c420f42289fe9afed9e325c6b21eb6a5a329e

[2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.4.32&id=3fcd53b1d859799686a08785afb8990566c31cfa

[3] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1873552

[4] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1873512/comments/20

Here is a test kernel, could you test it and tell us if it fixes your problem?

https://people.canonical.com/~ppisati/lp1871182/

linux-image-unsigned-5.4.0-25-generic_5.4.0-25.29~lp1871182_amd64.deb
linux-modules-5.4.0-25-generic_5.4.0-25.29~lp1871182_amd64.deb
linux-modules-extra-5.4.0-25-generic_5.4.0-25.29~lp1871182_amd64.deb

@Paolo, the test kernel does fix the problem for me.

Ethernet stopped working again after update today.
@vicamo here are the results for would you suggested in #8. It does appear that realtek.ko was included automatically for me but still not working.

finisdiem@finisdiem-HP-Pavilion-g6-Notebook-PC:~$ sudo modprobe -r realtek
[sudo] password for finisdiem:
finisdiem@finisdiem-HP-Pavilion-g6-Notebook-PC:~$ sudo update-initramfs -v -u
Available versions: 5.4.0-25-generic
5.4.0-24-generic
5.4.0-23-generic
5.4.0-22-generic
5.4.0-21-generic
Keeping /boot/initrd.img-5.4.0-25-generic.dpkg-bak
update-initramfs: Generating /boot/initrd.img-5.4.0-25-generic
Copying module directory kernel/drivers/usb/host
(excluding hwa-hc.ko sl811_cs.ko sl811-hcd.ko u132-hcd.ko whci-hcd.ko)
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/host/ehci-fsl.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/host/isp116x-hcd.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/ssb/ssb.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/host/ssb-hcd.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/host/fotg210-hcd.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/host/max3421-hcd.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/host/r8a66597-hcd.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/host/oxu210hp-hcd.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/bcma/bcma.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/host/bcma-hcd.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/host/xhci-plat-hcd.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/host/fsl-mph-dr-of.ko
Copying module directory kernel/drivers/usb/c67x00
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/c67x00/c67x00.ko
Copying module directory kernel/drivers/usb/chipidea
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/gadget/udc/udc-core.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/common/ulpi.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/roles/roles.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/phy/phy-generic.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/chipidea/ci_hdrc.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/chipidea/ci_hdrc_pci.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/chipidea/ci_hdrc_msm.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/chipidea/ci_hdrc_usb2.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/chipidea/ci_hdrc_zevio.ko
Copying module directory kernel/drivers/usb/dwc2
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/dwc2/dwc2_pci.ko
Copying module directory kernel/drivers/usb/dwc3
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/dwc3/dwc3-haps.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/dwc3/dwc3.ko
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/dwc3/dwc3-pci.ko
Copying module directory kernel/drivers/usb/isp1760
Adding module /lib/modules/5.4.0-25-generic/kernel/drivers/usb/isp1760/isp1760.ko
Copying module di...

@Paolo, test kernel didn't work for me. I had to reinstall official Realtek driver again like i did in #3.

@Paolo,

I have this too:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1873526

your -25 test kernel did work for me.

[ 0.930604] r8169 0000:01:00.0: can't disable ASPM; OS doesn't have ASPM control
[ 0.930615] ahci 0000:00:17.0: version 3.0
[ 0.937784] libphy: r8169: probed
[ 0.938205] r8169 0000:01:00.0 eth0: RTL8106e, a0:8c:fd:7e:9a:37, XID 449, IRQ 125

Test kernel from comment #11 worked!

This bug was fixed in the package linux - 5.4.0-26.30

---------------
linux (5.4.0-26.30) focal; urgency=medium

  * focal/linux: 5.4.0-26.30 -proposed tracker (LP: #1873882)

  * Packaging resync (LP: #1786013)
    - update dkms package versions

  * swap storms kills interactive use (LP: #1861359)
    - SAUCE: drm/i915: prevent direct writeback from the shrinker

  * 5.4.0-24.28 does not seem to apply rtprio, whereas -21 does. (LP: #1873315)
    - [Config] lowlatency: turn off RT_GROUP_SCHED

  * [RTL810xE] No ethernet connection (LP: #1871182)
    - net: phy: realtek: fix handling of RTL8105e-integrated PHY

 -- Andrea Righi <email address hidden> Mon, 20 Apr 2020 18:33:49 +0200

confirm: kernel 5.4.0-26 solved the problem

I can also confirm that kernel 5.4.0-26 solved the problem. Retested and all as should be.

Today I pulled the latest updates on Ubuntu 20.04 and now the wired connection on RTL810xE adapter works!

For me the problem is not fixed.
See my report here: https://ubuntuforums.org/showthread.php?t=2441385

It seems the PHY for my Realtek ethernet chip is not activated in the boot up process.
I have to locally log in and enter "dhclient enp2s0" to get the interface running. Only then the "PHY" shows up in the log:

[CODE]
Apr 24 09:06:27 fileserver kernel: RTL8211B Gigabit Ethernet r8169-200:00: attached PHY driver [RTL8211B Gigabit Ethernet] (mii_bus:>
Apr 24 09:06:28 fileserver systemd-networkd[443]: enp2s0: Link UP
Apr 24 09:06:28 fileserver kernel: r8169 0000:02:00.0 enp2s0: Link is Down
Apr 24 09:06:28 fileserver dhclient[1504]: DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 3 (xid=0xf0b4ed2b)
Apr 24 09:06:29 fileserver systemd-networkd[443]: enp2s0: Gained carrier
Apr 24 09:06:29 fileserver kernel: r8169 0000:02:00.0 enp2s0: Link is Up - 1Gbps/Full - flow control rx/tx
Apr 24 09:06:29 fileserver kernel: IPv6: ADDRCONF(NETDEV_CHANGE): enp2s0: link becomes ready
Apr 24 09:06:31 fileserver dhclient[1504]: DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 4 (xid=0xf0b4ed2b)
Apr 24 09:06:31 fileserver dhclient[1504]: DHCPOFFER of 192.168.0.103 from 192.168.0.1
Apr 24 09:06:31 fileserver dhclient[1504]: DHCPREQUEST for 192.168.0.103 on enp2s0 to 255.255.255.255 port 67 (xid=0x2bedb4f0)
Apr 24 09:06:31 fileserver dhclient[1504]: DHCPACK of 192.168.0.103 from 192.168.0.1 (xid=0xf0b4ed2b)
[/CODE]

@Michael, if 5.4.0-26.30 doesn't work for you, please file a new bug instead as this one has been marked FIXRELEASED.

It doesn’t work for me either. I downloaded latest image and booted live. It didn’t work there either.
I’m not sure why it was marked fix when it never worked for me. I was the one who first reported the bug.

Sent from my iPhone

> On Apr 24, 2020, at 1:21 AM, You-Sheng Yang <email address hidden> wrote:
>
> @Michael, if 5.4.0-26.30 doesn't work for you, please file a new bug
> instead as this one has been marked FIXRELEASED.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1871182
>
> Title:
> [RTL810xE] No ethernet connection
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1871182/+subscriptions

I could figure out "my" problem: https://ubuntuforums.org/showthread.php?t=2441385
somehow the network device name seems to have changed form enp3s0 as written in the /etc/netplan/00-installer-config.yaml config file to enp2s0. Then, my network was not activated at boot-up any more.