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FS#66988 - [intel-ucode] 20200609-2 system hangs during early boot

Attached to Project: Arch Linux
Opened by Kenneth Chin (kenchin) - Saturday, 13 June 2020, 04:57 GMT
Last edited by Christian Hesse (eworm) - Saturday, 13 June 2020, 19:22 GMT
Task Type Bug Report
Category Packages: Extra
Status Closed
Assigned To Christian Hesse (eworm)
Architecture All
Severity High
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No


The system hangs during early boot after upgraded intel-ucode from 20200520-1 to 20200609-2. After systemd-boot EFI boot manager, the system hangs with a blank screen, keyboard no respond, need to force power off.

I rebooted into the EFI boot manager and edited the Arch boot loader entry by removing initrd=/intel-ucode.img, then the system can boot up normally.

After that, I downgraded the intel-ucode to 20200520-1 and rebooted, and the system can boot up normally.

Computer: Dell Latitude E7470

uname -a:
Linux ark2 5.7.2-arch1-1 #1 SMP PREEMPT Wed, 10 Jun 2020 20:36:24 +0000 x86_64 GNU/Linux

Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
Address sizes: 39 bits physical, 48 bits virtual
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 2
Core(s) per socket: 2
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 78
Model name: Intel(R) Core(TM) i7-6600U CPU @ 2.60GHz
Stepping: 3
CPU MHz: 600.004
CPU max MHz: 3400.0000
CPU min MHz: 400.0000
BogoMIPS: 5602.18
Virtualization: VT-x
L1d cache: 64 KiB
L1i cache: 64 KiB
L2 cache: 512 KiB
L3 cache: 4 MiB
NUMA node0 CPU(s): 0-3
Vulnerability Itlb multihit: KVM: Mitigation: Split huge pages
Vulnerability L1tf: Mitigation; PTE Inversion; VMX conditional cache flushes, SMT vulnerable
Vulnerability Mds: Mitigation; Clear CPU buffers; SMT vulnerable
Vulnerability Meltdown: Mitigation; PTI
Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl and seccomp
Vulnerability Spectre v1: Mitigation; usercopy/swapgs barriers and __userpointer sanitization
Vulnerability Spectre v2: Mitigation; Full generic retpoline, IBPB conditional, IBRS_FW, STIBP conditional, RSB filling
Vulnerability Srbds: Vulnerable: No microcode
Vulnerability Tsx async abort: Mitigation; Clear CPU buffers; SMT vulnerable
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp md_clear flush_l1d
This task depends upon

Closed by  Christian Hesse (eworm)
Saturday, 13 June 2020, 19:22 GMT
Reason for closing:  Duplicate
Additional comments about closing:   FS#66978 
Comment by Christian Hesse (eworm) - Saturday, 13 June 2020, 08:26 GMT
This is a duplicate of  FS#66978  I think... The issue was present in 20200609-1, but the microcode for that specific CPU was reverted in 20200609-2.
Versions 20200520-1 and 20200609-2 should behave exactly the same for your system. Can you please verify versions used?
Comment by Kenneth Chin (kenchin) - Saturday, 13 June 2020, 18:53 GMT
You're right, it was microcode 20200609-1 that caused system hang. I upgraded to microcode 20200609-2 and the system can boot up properly. Thanks for the quick update on the intel-ucode package.