Ранее обращался по поводу случайного (раз в день - раз в пару недель) мертвого зависания системы. Наконец поймал причину:
root@vak:/home/xxx# dmesg|grep PROC
[ 2.475129] mce: [Hardware Error]: PROCESSOR 2:800f11 TIME 1687277732 SOCKET 0 APIC 5 microcode 8001138
root@vak:/home/xxx# dmesg|grep mce
[ 2.475113] mce: [Hardware Error]: Machine check events logged
[ 2.475115] mce: [Hardware Error]: CPU 8: Machine Check: 0 Bank 5: bea0000000000108
[ 2.475123] mce: [Hardware Error]: TSC 0 ADDR 1ffffaa845dbe MISC d012000100000000 SYND 4d000000 IPID 500b000000000
[ 2.475129] mce: [Hardware Error]: PROCESSOR 2:800f11 TIME 1687277732 SOCKET 0 APIC 5 microcode 8001138
Все, что сам смог понять из ИН - это известная причина именно для моего процессора случайного зависания системы, но как это лечится понять не смог
root@vak:/home/xxx# grep -F -m 1 "cpu family" /proc/cpuinfo
cpu family : 23
root@vak:/home/xxx# dmesg | grep microcode
[ 2.474348] microcode: CPU0: patch_level=0x08001138
[ 2.474355] microcode: CPU1: patch_level=0x08001138
[ 2.474362] microcode: CPU2: patch_level=0x08001138
[ 2.474366] microcode: CPU3: patch_level=0x08001138
[ 2.474371] microcode: CPU4: patch_level=0x08001138
[ 2.474377] microcode: CPU5: patch_level=0x08001138
[ 2.474383] microcode: CPU6: patch_level=0x08001138
[ 2.474387] microcode: CPU7: patch_level=0x08001138
[ 2.474392] microcode: CPU8: patch_level=0x08001138
[ 2.474398] microcode: CPU9: patch_level=0x08001138
[ 2.474402] microcode: CPU10: patch_level=0x08001138
[ 2.474407] microcode: CPU11: patch_level=0x08001138
[ 2.474428] microcode: Microcode Update Driver: v2.2.
root@vak:/home/xxx# grub-mkconfig -o /boot/grub/grub.cfg
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-5.15.0-73-generic
Found initrd image: /boot/initrd.img-5.15.0-73-generic
Found linux image: /boot/vmlinuz-5.15.0-72-generic
Found initrd image: /boot/initrd.img-5.15.0-72-generic
Found linux image: /boot/vmlinuz-5.15.0-71-generic
Found initrd image: /boot/initrd.img-5.15.0-71-generic
Found linux image: /boot/vmlinuz-5.13.0-52-generic
Found initrd image: /boot/initrd.img-5.13.0-52-generic
Adding boot menu entry for UEFI Firmware Settings
done