2.4.1 has AVX support required

[9Lukas5]

Hi, as of auto-updating to latest, my IMAP-Server is in a restart-loop and docker logs doesn't show anything at all.

Is this a known legit bug with 2.4.1, or am I the only one having this problem?

Edit 2025-03-31:
The issue for me is the required AVX support, which my server does not have.

[cmouse]

Hard to say without logs. Maybe your config has issues?

[9Lukas5]

When I upgraded to 2.4.0 I had a faulty config and got error messages in the log. But now with 2.4.1. it's not giving anything.

JFYI:
I'm replacing the default config with my own, rather then using the *.d folders to provide additional settings.

[cmouse]

Can you try

docker run --rm -it <mounts and such > dovecot/dovecot:2.4.1-dev bash

and start dovecot with dovecot -F

[9Lukas5]

Mh, I started it with the same config and TLS Key/Cert locally without a problem.
So, maybe it's something in my mailboxes, that throws it off? 🤔

That seems at leaset to be the only obvious difference between my laptop and the prod environment I left out.

[9Lukas5]

Uhmmm well, not really helpful I guess: 😆

[9Lukas5]

Could it be, that my specific version of Docker or Linux Kernel is doing something here?

Because with these starting options, there's not anything mounted to the container from the outside, and yet it core dumps on the prod-server, but doesn't on my laptop.

Prod-Server:

PRETTY_NAME="Ubuntu 22.04.5 LTS"
NAME="Ubuntu"
VERSION_ID="22.04"
VERSION="22.04.5 LTS (Jammy Jellyfish)"
VERSION_CODENAME=jammy

6.8.0-52-generic x86_64

Docker version 26.1.3, build 26.1.3-0ubuntu1~22.04.1

Local machine:

NAME="Fedora Linux"
VERSION="41 (Workstation Edition)"
RELEASE_TYPE=stable

6.13.8-200.fc41.x86_64 x86_64

Docker version 27.3.1, build 2.fc41

[cmouse]

Hum. Does your cpu lack avx support? Can you paste /proc/cpuinfo?

[9Lukas5]

Hm, yes it seems so 🧐

/proc/cpuinfo

processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 60
model name	: Intel(R) Pentium(R) CPU G3220 @ 3.00GHz
stepping	: 3
microcode	: 0x28
cpu MHz		: 2998.260
cache size	: 16384 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 2
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 13
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 cx16 pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer xsave rdrand hypervisor lahf_lm abm cpuid_fault pti ssbd ibrs ibpb stibp tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust erms invpcid xsaveopt arat vnmi umip md_clear arch_capabilities
vmx flags	: vnmi preemption_timer invvpid ept_x_only ept_ad ept_1gb flexpriority tsc_offset vtpr mtf vapic ept vpid unrestricted_guest shadow_vmcs pml
bugs		: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs srbds mmio_unknown bhi
bogomips	: 5996.52
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 60
model name	: Intel(R) Pentium(R) CPU G3220 @ 3.00GHz
stepping	: 3
microcode	: 0x28
cpu MHz		: 2998.260
cache size	: 16384 KB
physical id	: 0
siblings	: 2
core id		: 1
cpu cores	: 2
apicid		: 1
initial apicid	: 1
fpu		: yes
fpu_exception	: yes
cpuid level	: 13
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 cx16 pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer xsave rdrand hypervisor lahf_lm abm cpuid_fault pti ssbd ibrs ibpb stibp tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust erms invpcid xsaveopt arat vnmi umip md_clear arch_capabilities
vmx flags	: vnmi preemption_timer invvpid ept_x_only ept_ad ept_1gb flexpriority tsc_offset vtpr mtf vapic ept vpid unrestricted_guest shadow_vmcs pml
bugs		: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs srbds mmio_unknown bhi
bogomips	: 5996.52
clflush size	: 64
cache_alignment	: 64
address sizes	: 39 bits physical, 48 bits virtual
power management:

[cmouse]

Is this how old laptop?

[9Lukas5]

The server is a two core Pentium on an ATX Board.
But quite old now, yes. The CPU from 2013

[cmouse]

Ok. Lets see, I would recommend, for now, to build it locally with build.sh and removing -mavx.

[9Lukas5]

Alright, did that and indeed, without the AVX cflag dovecot 2.4.1 works on my server.

[hartmark]

I had the same problem, AVX is missing on my Intel G4560