Arch Linux linux 5.12.arch1-1 Intel Core2 T7200 Mobile Intel 945PM Express Chipset ICH7-M Mobility Radeon X1600 System log throws: ... watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [systemd-udevd: 241] ... RIP: 0010:smp_call_function_single+0xf7/0x140 ... Call Trace: ? __flush_tlb_all+0x30/0x30 ? __flush_tlb_all+0x30/0x30 on_each_cpu+0x39/0x90 ... and repeats indefinitely. smp_call_function_single is defined in kernel/smp.c