Ruediger Jungbeck's questions

Dom0 wrong

xl list 
Name                                        ID   Mem VCPUs      State   Time(s)
(null)                                       0 31898     8     r-----      27.7

starting of domains end with error

xl create xen/xxx.cfg
Parsing config from xen/xxx.cfg
libxl: error: libxl_domain.c:1214:libxl__get_domid: failed to get own domid (domid)
libxl: error: libxl_device.c:1167:device_hotplug: Domain 4:Failed to get domid
libxl: error: libxl_domain.c:1214:libxl__get_domid: failed to get own domid (domid)
libxl: error: libxl_device.c:1167:device_hotplug: Domain 4:Failed to get domid
libxl: error: libxl_create.c:1299:domcreate_launch_dm: Domain 4:unable to add disk devices
libxl: error: libxl_domain.c:1214:libxl__get_domid: failed to get own domid (domid)
libxl: error: libxl_device.c:968:libxl__initiate_device_generic_remove: Domain 4:unable to get my domid
libxl: error: libxl_domain.c:1214:libxl__get_domid: failed to get own domid (domid)
libxl: error: libxl_domain.c:1214:libxl__get_domid: failed to get own domid (domid)
libxl: error: libxl_device.c:968:libxl__initiate_device_generic_remove: Domain 4:unable to get my domid
libxl: error: libxl_domain.c:1214:libxl__get_domid: failed to get own domid (domid)
libxl: error: libxl_domain.c:1107:devices_destroy_cb: Domain 4:libxl__devices_destroy failed
libxl: error: libxl_domain.c:1034:libxl__destroy_domid: Domain 4:Non-existant domain
libxl: error: libxl_domain.c:993:domain_destroy_callback: Domain 4:Unable to destroy guest
libxl: error: libxl_domain.c:920:domain_destroy_cb: Domain 4:Destruction of domain failed

I have installed Ubuntu 20.04 64 Bit on my Raspberry Pi 4 (with 2 GB RAM). I have also installed lubuntu-desktop.

The system hangs (even the mouse cursor no longer works) after some time (a few minutes (up 30 minutes)) especially when there is some load on the system (like installing packages the require massive compiles (eg python3 -m pip install pandas). But I have also seen the effect without much load (but after a longer time).

I don't see a undervoltage or temperature warning on the screen