topic PCIe link loss occurs in the network driver after upgrading to version 5.19.4. in Ethernet Products

PCIe link loss occurs in the network driver after upgrading to version 5.19.4.

slice1 — Wed, 13 Aug 2025 09:28:22 GMT

After updating the i350 network card driver to version 5.19.4, I encountered the following issue:

[ 14.924409] igb: 925, Initializing the Flow Control address, type and timer regs
[ 16.730254] igb 0000:84:00.0 ens14f0: PCIe link lost, reg: 5b50
[ 16.794246] igb 0000:84:00.1 ens14f1: PCIe link lost, reg: 5b50
[ 16.794248] igb 0000:01:00.0 ens11f0: PCIe link lost, reg: 5b50
[ 16.830689] igb: 1618, Driver can't access device - SMBI bit is set.
[ 16.894631] igb: 1618, Driver can't access device - SMBI bit is set.
[ 16.894887] igb: 1618, Driver can't access device - SMBI bit is set.
[ 16.930815] igb: 1618, Driver can't access device - SMBI bit is set.

The firmware information for the network card is as follows:
1. i350
ethtool -i ens11f1
driver: igb
version: 5.19.4_debug
firmware-version: 1.63, 0x80000a06
expansion-rom-version:
bus-info: 0000:01:00.1
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: no

2 82576
ethtool -i ens14f0
driver: igb
version: 5.19.4_debug
firmware-version: 2.0, 0x00013989
expansion-rom-version:
bus-info: 0000:84:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: no

I also tested other i350 network cards, which have firmware version 1.63 (0x800009fa), but they did not exhibit the same issue. Is this a valid assumption?

btw, the kernel log and PCI information are included in the attachments

Re:PCIe link loss occurs in the network driver after upgrading to version 5.19.4.

vish1 — Thu, 14 Aug 2025 23:27:04 GMT

Hello slice1,

Greetings!!

To effectively troubleshoot the issue you are facing, we require some additional information from your end.

Could you kindly provide the following details:

Kindly share the system details.
Please confirm if the product was purchased separately or if it came along with the system.
Please provide front and back pictures of the adapter, including details of the label markings.
Could you please let us know if any troubleshooting has been performed.

Your prompt response with this information will greatly assist us in diagnosing and resolving the issue as quickly as possible.

We look forward to hearing from you soon.

Best Regards,

Vishal Shet P

Intel Customer Support Technician

Re:PCIe link loss occurs in the network driver after upgrading to version 5.19.4.

vish1 — Mon, 18 Aug 2025 19:31:01 GMT

Hello slice1,

Greetings for the day!!

This is the first follow-up regarding the issue you reported to us.

We wanted to inquire whether you had the opportunity to review our previous email we provided.

Best Regards,

Vishal Shet P

Intel Customer Support Technician

Re:PCIe link loss occurs in the network driver after upgrading to version 5.19.4.

vish1 — Thu, 21 Aug 2025 16:28:33 GMT

Hello slice1,

Greetings!!

This is the second follow-up regarding the reported issue. We're eager to ensure a swift resolution and would appreciate any updates or additional information you can provide.

Please feel free to respond to this email at your earliest convenience.

Best Regards,

Vishal Shet P

Intel Customer Support Technician