Friday, January 20th 2023

PSA: Intel I226-V 2.5GbE on Raptor Lake Motherboards Has a Connection Drop Issue: No Fix Available

The Intel Ethernet i226-V onboard 2.5 GbE controller appears to have a design flaw that causes the Ethernet connection to drop at random times for a few seconds. The I226-V is the latest version of Intel's cost-effective 2.5 Gbps Ethernet networking chips meant for PC motherboards with chipsets that have integrated MACs (i.e. Intel chipsets). It succeeds the I225-V, which was Intel's first consumer 2.5 GbE PHY. The I225-V was plagued by various issues that caused it to be unstable at 2.5 Gbps (but could be worked around by forcing 1 GbE mode). Many premium Intel 700-series chipset Socket LGA1700 motherboards integrate the new I226-V, which is the I225's successor, as their default onboard 2.5 GbE controller. Some enthusiast-segment motherboards have a second Ethernet controller that's either of a different brand (such as Realtek or Marvell), or a different kind of wired Ethernet (such as 10 GbE).

Since mid-December, users of Intel 700-series chipset motherboards (which debut the I226-V), have been reporting random connections drops to Intel's Support Community, Microsoft, ASUS and Reddit 1, 2, 3, 4, 5. These drops are momentary, last a few seconds, and you'll mostly not notice it; however for applications that need an uninterrupted connection (such as online gaming, video conferencing, VPN, Remote Desktop etc.), such a link drop will be noticeable. You can check if you are affected by opening Windows Event Viewer, navigate to "Windows Logs," "System" and search for "e2fnexpress," in particular Event 27 "Intel Ethernet Controller I226-V, Network link is disconnected." and Event 32 "Intel Ethernet Controller I226-V. Network link has been established at 1 Gbps full duplex." We've experienced the issue in our labs. We tried updating to the latest 27.8 drivers from Intel, and used the latest motherboard BIOS, at 1 Gbps speed, but the issue couldn't be fixed reliably. In the end, we just switched over to the motherboard's second network interface, which is not an Intel NIC, and the issue went away. Another option could be to buy a cheap PCI-Express network card or use the board's integrated Wi-Fi. Still, such issues aren't acceptable, especially not from a world-leading manufacturer like Intel, who once was reputed for the quality of its networking equipment. Intel and its motherboard partners need to get on top of this issue.

Update Mar 1st: Intel has issued a Windows workaround and patch for these issues. Let us know if this fixes it for you.

Update Mar 4th: User @lovingbenji reports that on his system this new driver version does not fix the disconnect issue.
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207 Comments on PSA: Intel I226-V 2.5GbE on Raptor Lake Motherboards Has a Connection Drop Issue: No Fix Available

#101
regs
Berfs1Possibly irrelevant, but the thing with the AX2x1 chips, they use CNVi, versus the AX2x0 chips which are PCIe x1. The AX2x1 chips are used in systems that have the Wifi integrated into the chipset, while the AX2x0 chips are used in systems that don't have integrated Wifi.
More basically saying - AX201 is a radio module for CNVio controller, while AX200 is a standalone solution with built-in controller. I have AX200 card as well. Only working in PCIe_x1_2 with X570 Aorus Pro. PCIe_x4 is completely dead. PCIe_x1_2 doesn't accept other cards. 2023 and AMD still can't get their chipsets under control.
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#102
Berfs1
regsOnly working in PCIe_x1_2 with X570 Aorus Pro. PCIe_x4 is completely dead. PCIe_x1_2 doesn't accept other cards. 2023 and AMD still can't get their chipsets under control.
I doubt that's an AMD issue, this might be Gigabyte's fault, or the board is damaged. They are known for making a lot of problematic motherboards over the last like 7 years, since Z170 era.
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#103
gregs1104
Just after AMD AM5 launched last year I picked up an ASUS ROG STRIX X670E-A GAMING WIFI for a 7700X. It has an Intel I225 2.5G LAN (I225-V rev 03) and I'm using Linux. If I let the NIC go into power saving, it never returns, and only a reboot brings the connection back. For the first two months I had to reboot it daily. Now that I have the right kernel incantation to stop the buggy parts via Reddit discussion, it seems reliable enough. But I have both a 2.5G Realtek PCI card and a USB NIC on hand on the assumption one of these days I'll find another showstopper bug I can't fix. Quite the inversion from the Linux days where I checked all motherboard purchases to make sure they had an Intel Gb NIC instead of a Realtek...
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#104
TechLurker
Now would be a good time as any for AMD to leverage their Xilinx acquisition and show up as another player in the networking space, especially as they're focused on the commercial/enterprise sector, and have it trickle back down to consumer level.
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#105
zlobby
gregs1104Just after AMD AM5 launched last year I picked up an ASUS ROG STRIX X670E-A GAMING WIFI for a 7700X. It has an Intel I225 2.5G LAN (I225-V rev 03) and I'm using Linux. If I let the NIC go into power saving, it never returns, and only a reboot brings the connection back. For the first two months I had to reboot it daily. Now that I have the right kernel incantation to stop the buggy parts via Reddit discussion, it seems reliable enough. But I have both a 2.5G Realtek PCI card and a USB NIC on hand on the assumption one of these days I'll find another showstopper bug I can't fix. Quite the inversion from the Linux days where I checked all motherboard purchases to make sure they had an Intel Gb NIC instead of a Realtek...
The times we live in!




Sorry, no time to meme it properly while on phone.
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#108
Tartaros
AnarchoPrimitivWouldn't that just introduce more overhead and additional points of failure?
I've been using usb ethernet adapters for years since most corp ultrabooks dropped ethernet. They work well, as always just buy a reputable brand.
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#109
zlobby
TartarosI've been using usb ethernet adapters for years since most corp ultrabooks dropped ethernet. They work well, as always just buy a reputable brand.
*Up to 1Gbps. After that it becomes hell. Overheating and connection drops galore. Check the web if you don't trust me.
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#110
Sora
dir_dAMD does not run intel nics
Yes it does.
Alan SmitheeI have a hard time believing this issue affects all i226-V NICs. ServeTheHome has tested multiple firewall PCs with i226-V and I'm sure they would have noticed dropouts.

Intel Celeron J6413 Powered 6x i226 2.5GbE Fanless Firewall Review (servethehome.com)
New Fanless 4x 2.5GbE Intel N5105 i226-V Firewall Tested (servethehome.com)
theres compatibility issues with certain switch hardware configurations when using auto negotiated port settings.
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#111
robal
robalSomeone on Reddit claims that changing from 'Autodetect' to '2.5 Gbps Full Duplex' is a workaround.
intel/comments/zpgy7j/_/j59hy3a
Can anyone with the issue confirm this ?
That would be enough for me to justify buying z790 board now.
Few people in Reddit above now confirmed that this workaround works.
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#112
Sora
Amusingly, the issue doesn't manifest when you connect an i225 to an i226
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#113
Tartaros
zlobby*Up to 1Gbps. After that it becomes hell. Overheating and connection drops galore. Check the web if you don't trust me.
Oh, I imagine that's the case, I wouldn't use them to be the backbone of my home server, that's for sure. But for daily office work and what most people do online, they are very good.

Still for what I little I know about 2,5GB and 5GB, they are quite the crappy standard, I've read nothing but problems about them. On the other hand, seems like 10GB is for the most part ok.
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#114
zlobby
TartarosOh, I imagine that's the case, I wouldn't use them to be the backbone of my home server, that's for sure. But for daily office work and what most people do online, they are very good.

Still for what I little I know about 2,5GB and 5GB, they are quite the crappy standard, I've read nothing but problems about them. On the other hand, seems like 10GB is for the most part ok.
Yeah, no. I won't be happy if my VPN drops because of the adapter. Also, stay away from 10Gbps even if you run nothing critical on it.
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#115
A Computer Guy
zlobbyYeah, no. I won't be happy if my VPN drops because of the adapter. Also, stay away from 10Gbps even if you run nothing critical on it.
I've been dreaming about having a 10Gbps network now that Synology has an adaptor for their new NAS units. What's wrong with 10Gbps?
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#116
zlobby
A Computer GuyI've been dreaming about a 10Gbps network now that Synology has an adaptor for their new NAS units. What's wrong with 10Gbps?
I meant that there are many issues with 10GbE USB-to-ETH adapters. There is nothin wrong with 10GbE per se. Due to (mainly) client limitations I too use mainly 10Gbps links around home.
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#117
A Computer Guy
zlobbyI meant that there are many issues with 10GbE USB-to-ETH adapters. There is nothin wrong with 10GbE per se. Due to (mainly) client limitations I too use mainly 10Gbps links around home.
Ahh, yes USB adaptor issues. Thanks!
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#118
Abula
Sad to see this from intel. Really was hopping the l226 didnt had as much issues as the l225 had on release. :kookoo:

Now i got two build on the way, both with l226 nics inside, that ill have to get some PCIe I225 v3 or B3 stepping cards, so they are network reliable. :mad:

Do you guys think this could be fixable with drivers?

Wondering how is the Realtek Dragon RTL8125BG?
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#119
zlobby
AbulaWondering how is the Realtek Dragon RTL8125BG?
It's software is bad it seems.
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#120
Panther_Seraphin
robalFew people in Reddit above now confirmed that this workaround works.
Reading that post it basically confirms that it may not drop out any more (small sample size) the other thing is that this is only tested at 1Gbps by reading that post.

So its better, but I wouldnt say "fixed" yet
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#121
thestryker6
AbulaSad to see this from intel. Really was hopping the l226 didnt had as much issues as the l225 had on release. :kookoo:

Now i got two build on the way, both with l226 nics inside, that ill have to get some PCIe I225 v3 or B3 stepping cards, so they are network reliable. :mad:

Do you guys think this could be fixable with drivers?

Wondering how is the Realtek Dragon RTL8125BG?
There's nothing wrong with the i226-V controller itself, so it's entirely possible you won't have a single issue. The most likely causes of the issues are a bad batch of controllers (unfixable through software), bad implementation on motherboard (potentially, but unlikely, fixable by software), and/or problems with the software stack itself. Until the actual root cause of the issues is determined nobody has a clue as to what may permanently resolve whatever is being experienced. There are several potential solutions and if you end up being one of the folks having problems it doesn't hurt to try them.
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#122
trparky
AbulaSad to see this from Intel.
This is what happens when the bean counters take over from real engineers.
AbulaWondering how is the Realtek Dragon RTL8125BG?
I have a B650 board here with an RTL8125 onboard. So far, no issues at all. Rock solid stable.
zlobbyIt's software is bad it seems.
Not from what I can see. OK sure, the add-on Dragon whatever software sucks but the driver itself is fine and that's all I care about. Is it stable? Yes.
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#123
Tartaros
zlobbyI meant that there are many issues with 10GbE USB-to-ETH adapters. There is nothin wrong with 10GbE per se. Due to (mainly) client limitations I too use mainly 10Gbps links around home.
For what I know about 10GbE, they have been around for 20 years in IT environments while 2,5 and 5 are just a step down from that intended for home users and is still quite green, that's what I meant. I can't imagine anything >1Gb in USB form being decent enough too. I don't really have read enough into things above 1GbE since I don't really have a use for it, but probably I would go directly to 10GbE if that was the case.
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#124
qoonik
Since Mac mini M1/M2 have an option to get 10Gbit Nic and we have problems on PC with 2.5Gbit nic-> what the hell is going on.
We should have already 10Gbit Nics as standard for PC.
Apple Mac Mini M1 10GbE Gets 10Gbase-T

Use cases
You have local network with NAS on 10Gbit....
Some internet providers already have modems with 2.5Gbit nic
zlobbyI meant that there are many issues with 10GbE USB-to-ETH adapters. There is nothin wrong with 10GbE per se. Due to (mainly) client limitations I too use mainly 10Gbps links around home.
I think on professional server side you are using pcie 2 x 10Gbit nic cards. Nobody is using USB to nic:
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#125
keepitscottie
got a brand new asus z690i gaming motherboard. hoping to take advantage of my new Ubiquiti Dream Machine (10gbps ethernet and all) only discover this issue on first boot when trying to download windows updates. i forced 2.5gbe mode -- the network adapater drops the connection and works for a few seconds after disabling and re-enabling, it does the same set to auto-negotiation, but it works fine set to 1gbe. really upsetting.
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