Created attachment 285727 [details] part of syslog at system start Hello, I get that problem at start, the system boot and runs well after that bug. I have had some other crashes during system activity or while stopping but I did not get any trace. I enclose the stack trace. Regards JP P PS : System is Debian Buster running with Xen. CPU : i7-6700 CPU @ 3.40GHz RAM : 32Go Some disks with a (new) NVME disk