Kernel panic

[amnixed]

Hello Experts,

My computer crashed a couple of times the last few weeks. It's an i7-4790K from 2016 and worked with no problems until now:

# dmesg
MCA: Bank 4, Status 0xbe00000000800400
MCA: Bank 4, Status 0xbe00000000800400
MCA: Bank 4, Status 0xbe00000000800400
MCA: Bank 4, Status 0xbe00000000800400
MCA: Bank 4, Status 0xbe00000000800400
MCA: Bank 4, Status 0xbe00000000800400
MCA: Global Cap 0x0000000000000c09, Status 0x0000000000000005
MCA: Global Cap 0x0000000000000c09, Status 0x0000000000000005
MCA: Vendor "GenuineIntel", ID 0x306c3, APIC ID 5
MCA: CPU 5 UNCOR EN PCC MCA: Vendor "GenuineIntel", ID 0x306c3, APIC ID 4
MCA: CPU 4 UNCOR EN PCC internal timer errorinternal timer error
MCA: Address 0xffffffff80c3cbbb
MCA: Misc 0xffffffff80c3cbbb
timeout stopping cpus
panic: Unrecoverable machine check exception
cpuid = 4
time = 1701631866
KDB: stack backtrace:
Uptime: 2d15h9m16s


Do I have a failing CPU?

Please advise.

 

[bakul]

Web search with "MCA: CPU 5 UNCOR EN PCC" or more context. There are some old threads on this forum that may be of help.

 

[amnixed]

In at least one thread, changing the default

hw.mca.enabled: 1

to 0 may have solved the problem.

However, I am reluctant to change a default value without good understanding.