Public bug reported:
Symptom :
OCP NIC hot insert to system and can't archive to Gen5 speed
Hardware configuration :
CPU : SRF-SP Q4WS *2
OCP NIC MCX753436MC-HEAB (FW : 28.39.2048)
Test scenario as below :
1. Boot into OS
2. Check system status is fine and clear all dmesg and SEL
3. Unload mlx5_ib and mlx5_core
4. Plug out OCP NIC
5. Check dmesg and SEL shown PCIe error caused by receiver error, assume the
normal behavior
6. Plug in back the OCP NIC in same slot
7. Check the PCIe link status
Summary result :
OS version Kernel version Test result
Ubuntu 22.04.0 5.15 Gen5
Ubuntu 22.04.4 6.5 Gen1
Ubuntu 24.04 6.8 Gen1
UEFI SHELL N/A Gen5
Windows 2022 N/A Gen5
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2085103
Title:
pci hot plug get "retraining non-functional downstream link at
2.5GT/s]"
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