At boot I get: [ 1.307677] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 [ 1.376286] acpi PNP0A03:02: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI] [ 1.380879] acpi PNP0A03:03: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI] [ 1.385147] acpi LNXCPU:1c: Failed to get unique processor _UID (0xff) [ 1.385162] acpi LNXCPU:1d: Failed to get unique processor _UID (0xff) [ 1.385176] acpi LNXCPU:1e: Failed to get unique processor _UID (0xff) [ 1.385192] acpi LNXCPU:1f: Failed to get unique processor _UID (0xff) [ 1.385207] acpi LNXCPU:20: Failed to get unique processor _UID (0xff) [ 1.385221] acpi LNXCPU:21: Failed to get unique processor _UID (0xff) [ 1.385236] acpi LNXCPU:22: Failed to get unique processor _UID (0xff) [ 1.385251] acpi LNXCPU:23: Failed to get unique processor _UID (0xff) [ 1.385737] acpi LNXCPU:40: Failed to get unique processor _UID (0xff) [ 1.385751] acpi LNXCPU:41: Failed to get unique processor _UID (0xff) [ 1.385766] acpi LNXCPU:42: Failed to get unique processor _UID (0xff) [ 1.385780] acpi LNXCPU:43: Failed to get unique processor _UID (0xff) [ 1.385795] acpi LNXCPU:44: Failed to get unique processor _UID (0xff) [ 1.385809] acpi LNXCPU:45: Failed to get unique processor _UID (0xff) [ 1.385824] acpi LNXCPU:46: Failed to get unique processor _UID (0xff) [ 1.385838] acpi LNXCPU:47: Failed to get unique processor _UID (0xff) [ 1.385864] acpi LNXCPU:48: Failed to get unique processor _UID (0xff) [ 1.385878] acpi LNXCPU:49: Failed to get unique processor _UID (0xff) [ 1.385893] acpi LNXCPU:4a: Failed to get unique processor _UID (0xff) [ 1.385907] acpi LNXCPU:4b: Failed to get unique processor _UID (0xff) [ 1.385922] acpi LNXCPU:4c: Failed to get unique processor _UID (0xff) [ 1.385936] acpi LNXCPU:4d: Failed to get unique processor _UID (0xff) [ 1.385951] acpi LNXCPU:4e: Failed to get unique processor _UID (0xff) [ 1.385965] acpi LNXCPU:4f: Failed to get unique processor _UID (0xff) [ 1.385980] acpi LNXCPU:50: Failed to get unique processor _UID (0xff) [ 1.385995] acpi LNXCPU:51: Failed to get unique processor _UID (0xff) [ 1.386009] acpi LNXCPU:52: Failed to get unique processor _UID (0xff) [ 1.386023] acpi LNXCPU:53: Failed to get unique processor _UID (0xff) [ 1.386038] acpi LNXCPU:54: Failed to get unique processor _UID (0xff) [ 1.386052] acpi LNXCPU:55: Failed to get unique processor _UID (0xff) [ 1.386067] acpi LNXCPU:56: Failed to get unique processor _UID (0xff) [ 1.386087] acpi LNXCPU:57: Failed to get unique processor _UID (0xff) [ 1.386102] acpi LNXCPU:58: Failed to get unique processor _UID (0xff) [ 1.386117] acpi LNXCPU:59: Failed to get unique processor _UID (0xff) [ 1.386131] acpi LNXCPU:5a: Failed to get unique processor _UID (0xff) [ 1.386146] acpi LNXCPU:5b: Failed to get unique processor _UID (0xff) [ 1.386161] acpi LNXCPU:5c: Failed to get unique processor _UID (0xff) [ 1.386175] acpi LNXCPU:5d: Failed to get unique processor _UID (0xff) [ 1.386190] acpi LNXCPU:5e: Failed to get unique processor _UID (0xff) [ 1.386205] acpi LNXCPU:5f: Failed to get unique processor _UID (0xff) [ 1.386219] acpi LNXCPU:60: Failed to get unique processor _UID (0xff) [ 1.386234] acpi LNXCPU:61: Failed to get unique processor _UID (0xff) [ 1.386249] acpi LNXCPU:62: Failed to get unique processor _UID (0xff) [ 1.386264] acpi LNXCPU:63: Failed to get unique processor _UID (0xff) [ 1.386279] acpi LNXCPU:64: Failed to get unique processor _UID (0xff) [ 1.386294] acpi LNXCPU:65: Failed to get unique processor _UID (0xff) [ 1.386308] acpi LNXCPU:66: Failed to get unique processor _UID (0xff) [ 1.386323] acpi LNXCPU:67: Failed to get unique processor _UID (0xff) [ 1.386337] acpi LNXCPU:68: Failed to get unique processor _UID (0xff) [ 1.386352] acpi LNXCPU:69: Failed to get unique processor _UID (0xff) [ 1.386366] acpi LNXCPU:6a: Failed to get unique processor _UID (0xff) [ 1.386691] acpi LNXCPU:6b: Failed to get unique processor _UID (0xff) [ 1.386724] acpi LNXCPU:6c: Failed to get unique processor _UID (0xff) [ 1.386739] acpi LNXCPU:6d: Failed to get unique processor _UID (0xff) [ 1.386753] acpi LNXCPU:6e: Failed to get unique processor _UID (0xff) [ 1.386768] acpi LNXCPU:6f: Failed to get unique processor _UID (0xff) [ 1.386782] acpi LNXCPU:70: Failed to get unique processor _UID (0xff) [ 1.386797] acpi LNXCPU:71: Failed to get unique processor _UID (0xff) [ 1.386811] acpi LNXCPU:72: Failed to get unique processor _UID (0xff) [ 1.386826] acpi LNXCPU:73: Failed to get unique processor _UID (0xff) [ 1.386840] acpi LNXCPU:74: Failed to get unique processor _UID (0xff) [ 1.386855] acpi LNXCPU:75: Failed to get unique processor _UID (0xff) [ 1.386876] acpi LNXCPU:76: Failed to get unique processor _UID (0xff) [ 1.386890] acpi LNXCPU:77: Failed to get unique processor _UID (0xff) [ 1.386905] acpi LNXCPU:78: Failed to get unique processor _UID (0xff) [ 1.386919] acpi LNXCPU:79: Failed to get unique processor _UID (0xff) [ 1.386934] acpi LNXCPU:7a: Failed to get unique processor _UID (0xff) [ 1.386949] acpi LNXCPU:7b: Failed to get unique processor _UID (0xff) [ 1.386964] acpi LNXCPU:7c: Failed to get unique processor _UID (0xff) [ 1.386978] acpi LNXCPU:7d: Failed to get unique processor _UID (0xff) [ 1.386993] acpi LNXCPU:7e: Failed to get unique processor _UID (0xff) [ 1.387007] acpi LNXCPU:7f: Failed to get unique processor _UID (0xff) [ 1.387022] acpi LNXCPU:80: Failed to get unique processor _UID (0xff) [ 1.387037] acpi LNXCPU:81: Failed to get unique processor _UID (0xff) [ 1.387051] acpi LNXCPU:82: Failed to get unique processor _UID (0xff) [ 1.387065] acpi LNXCPU:83: Failed to get unique processor _UID (0xff) [ 1.387080] acpi LNXCPU:84: Failed to get unique processor _UID (0xff) [ 1.387095] acpi LNXCPU:85: Failed to get unique processor _UID (0xff) [ 1.387109] acpi LNXCPU:86: Failed to get unique processor _UID (0xff) [ 1.387124] acpi LNXCPU:87: Failed to get unique processor _UID (0xff) [ 1.387138] acpi LNXCPU:88: Failed to get unique processor _UID (0xff) [ 1.387153] acpi LNXCPU:89: Failed to get unique processor _UID (0xff) [ 1.387167] acpi LNXCPU:8a: Failed to get unique processor _UID (0xff) [ 1.387182] acpi LNXCPU:8b: Failed to get unique processor _UID (0xff) [ 1.387198] acpi LNXCPU:8c: Failed to get unique processor _UID (0xff) [ 1.387212] acpi LNXCPU:8d: Failed to get unique processor _UID (0xff) [ 1.387227] acpi LNXCPU:8e: Failed to get unique processor _UID (0xff) [ 1.387241] acpi LNXCPU:8f: Failed to get unique processor _UID (0xff) This is an ASUSTeK Z10PE-D8 WS Dual Intel(R) Xeon(R) CPU E5-2697 v3 @ 2.60GHz Perhaps this is relevant: https://lkml.org/lkml/2018/5/28/213 It does not appear to cause any issues, but kernel failure messages should probably be avoided.
please attach the acpidump output of this machine. and also the output of "cat /proc/cpuinfo"
Bug closed as there is no response from the bug reporter. Please feel free to reopen it if you can provide the information required in comment #1.
Created attachment 284859 [details] cpuinfo
Created attachment 284861 [details] acpidump
Sorry, this fell off my todo.
This is a BIOS bug. Processor (CP18, 0xFF, 0x00000410, 0x06){} Processors not present should not be assigned a LAPIC id, and 0xff is not a magic number for a non-present Processor. I think kernel is doing the right thing on those error messages. And the only way to fix this is to remove the non-present processor declarations in the ACPI table.