kernel bug: pve-kernel-5.15.85-1-pve

[mir]

After upgrading to this kernel sensor readings through i2c is broken. The console is spammed with these messages:
[24271.599465] i2c i2c-0: Failed! (01)

Booting on kernel pve-kernel-5.15.83-1-pve and sensor reading is restored and no i2c errors in the log.

Hardware:
System Information
Manufacturer: Supermicro
Product Name: H8SML
Version: 1234567890

vendor_id : AuthenticAMD
cpu family : 21
model : 2
model name : AMD Opteron(tm) Processor 3365

 

[janssensm]

Not an expert here, but just to get a hint about what sensor is failing you could compare in both kernels what sensors are reported and working by searching both boot logs and or installing i2c-tools and running i2cdetect.

Sensor could be on a different adapter number, as stated here:
https://www.kernel.org/doc/html/v5.15/i2c/dev-interface.html