I have the same issue with an AMD EPYC 9334 32-core processor. The Problem appears with an upgrade to Ubuntu 22.04.4., already with live ubuntu from a bootstick. Ubuntu 22.04.3 works fine. A fresh install (without updates on OS install) of 22.04.3 runs without problems. After the 1st apt upgrade the problem appears. Intrestingly, as well with the updated 6.5.0-21 kernel as with the 6.2.0.26 kernel that was installed with 22.04.3.
Besides, with Kernel 6.5.0-21 the error message on boot now is 'CPU32 failed to report alive state'. Also, when running the root shell in recovery mode the missing thread is online. Motherboard is a Gigabyte MZ33-AR0. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-hwe in Ubuntu. https://bugs.launchpad.net/bugs/2042888 Title: It shows 'smpboot: do_boot_cpu failed(-1) to wakeup CPU#96' in system dmesg log with kernel version 6.2.0-060200-generic. Status in linux-hwe package in Ubuntu: Confirmed Bug description: OS: Ubuntu 22.04.3 LTS Release: 22.04 Kernel: 6.2.0-060200-generic CPU: 1x EPYC 9654 DIMM: 2x Samsung DDR5 16G 1.Install Ubuntu 22.04.3 and upgrade its kernel to 6.2.0-060200-generic (also tried on kernel 6.5.7-060507) 2.Reboot system and enable SMT-Control from BIOS. 3.Boot to system to read lscpu.txt and dmesg.txt, lscpu log show Off-line CPU(s) info as below: CPU(s): 192 On-line CPU(s) list: 0-95,97-191 Off-line CPU(s) list: 96 Vendor ID: AuthenticAMD Model name: AMD EPYC 9654 96-Core Processor CPU family: 25 Model: 17 Thread(s) per core: 2 Core(s) per socket: 96 Socket(s): 1 Stepping: 1 Frequency boost: enabled dmesg log show CPU fail info as below, [ 0.360560] smp: Bringing up secondary CPUs ... [ 0.360708] x86: Booting SMP configuration: [ 0.360711] .... node #0, CPUs: #1 #2 #3 #4 #5 #6 #7 #8 #9 #10 #11 #12 #13 #14 #15 #16 #17 #18 #19 #20 #21 #22 #23 #24 #25 #26 #27 #28 #29 #30 #31 #32 #33 #34 #35 #36 #37 #38 #39 #40 #41 #42 #43 #44 #45 #46 #47 #48 #49 #50 #51 #52 #53 #54 #55 #56 #57 #58 #59 #60 #61 #62 #63 #64 #65 #66 #67 #68 #69 #70 #71 #72 #73 #74 #75 #76 #77 #78 #79 #80 #81 #82 #83 #84 #85 #86 #87 #88 #89 #90 #91 #92 #93 #94 #95 #96 [ 10.631524] smpboot: do_boot_cpu failed(-1) to wakeup CPU#96 [ 10.631842] #97 BTW, we also find the same bug on AMD EPYC 9534 64-Core CPU with Ubuntu 22.04.3-kernel 6.2.0 and 6.5.7. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe/+bug/2042888/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
