On Sat, Jul 05, 2025 at 01:00:23AM +0530, Bandhan Pramanik wrote: > Hi everyone, > > Here after a week. I did my research. > > I talked to some folks on IRC and the glaring issue was basically this: > > > [ 1146.810055] pcieport 0000:00:1c.0: AER: Uncorrectable (Fatal) error message received from 0000:01:00.0 Where is the complete dmesg log from which this is extracted? > This basically means that the root port (that 1c thing written with > colons) of PCIe is the main problem here. > > One particular note: this issue can be reproduced on the models of > this same laptop. Therefore, this happens in most if not all of the > laptops of the same model. > > For starters, the root port basically manages the communication > between the CPU and the device. Now, this root port itself is > reporting fatal errors. > > This is not a Wi-Fi error, but something deeper. Devices that support AER have extra log registers to capture details about an error. A device that detects an error sends a PCIe Error Message upstream to a Root Port. The Root Port generates an interrupt, which is handled by the aer driver. In this case, the 01:00.0 device detected an error and sent an ERR_FATAL message upstream, and the 00:1c.0 Root Port received it and generated an interrupt. The ERR_FATAL message doesn't contain any details about the error itself, so the aer driver looks for the AER registers in the 01:00.0 device and logs those details to the dmesg log. Normally there would be a few lines after the one you quoted that would include those details. Bjorn
