Hello, Vidya Sagar wrote: > Since this is a laptop, I'm suspecting that ASPM states might have > been enabled which could be causing these errors. Keith Busch, le lun. 04 janv. 2021 10:44:35 -0800, a ecrit: > Sometimes these types of errors occur from low power settings, so you > can try disabling the automatic management of these (assuming the > hardware supports it). To disable nvme specific power state transitions, > the kernel parameter is "nvme_core.default_ps_max_latency_us=0". I have tried to add it, and this one line changed in lspci -vv: 02:00.0 Non-Volatile memory controller: Sandisk Corp WD Black SN750 / PC SN730 NVMe SSD (prog-if 02 [NVM Express]) [...] Capabilities: [c0] Express (v2) Endpoint, MSI 00 [...] DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr- TransPend- turned to DevSta: CorrErr+ NonFatalErr- FatalErr- UnsupReq+ AuxPwr- TransPend- that last value happens to be what I was seeing for that line with the manufacturer-provided ubuntu linux kernel. So far (30m uptime) no corrected error report, I'll watch in the coming hours/days to see if that avoided the issue. I wasn't able to trigger such corrected errors by loading the machine, so possibly that's indeed the converse that I should have been trying: letting it go low power :) > PCI also has automatic link power savings that you can disable with > parameter "pcie_aspm=off". I'll try that if I still see errors with the nvme_core parameter. Samuel
