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Bug#1137203: bnx2: ifupdown-hotplug fails at boot, no network, regression from 5.10.0-42

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On Wed, 2026-05-20 at 23:13 +0200, Rémy wrote:
> Package: src:linux
> Version: 5.10.251-5
> Severity: important
> 
> Dear Maintainer,
> 
> Regression introduced in linux-image-5.10.0-43-amd64 (5.10.251-5).
> Previous kernel linux-image-5.10.0-42-amd64 (5.10.251-4) works correctly.
> 
> Network card: Broadcom NetXtreme II BCM5716 (driver: bnx2)
> Network config: /etc/network/interfaces with "allow-hotplug eno1" and "iface eno1 inet dhcp"
> 
> On boot with 5.10.0-43, ifupdown-hotplug fails with exit code 1 and
> the interface eno1 gets no IP address, making the server completely
> unreachable via network.
> 
> Relevant boot log (journalctl -b):
>   kernel: bnx2 0000:02:00.0 eno1: renamed from eth0
>   systemd-udevd[289]: eno1: Process 'ifupdown-hotplug' failed with exit code 1
> 
> Workaround: boot on 5.10.0-42-amd64 via GRUB_DEFAULT in /etc/default/grub.
> 
> Note: this bug is reported from kernel 5.10.0-42 since 5.10.0-43 makes
> the server unreachable at boot.

As you can see in the changelog, there were no changes to this network
driver nor to any other networking code between these 2 versions.

So I think that this apparent regression is really just a bug that
occurs rarely and happened to occur when you booted the new version.

Did you try to boot the new version more than once?

Ben.

-- 
Ben Hutchings
Everything should be made as simple as possible, but not simpler.
                                                      - Albert Einstein

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Bug#1137203: bnx2: ifupdown-hotplug fails at boot, no network, regression from 5.10.0-42 Rémy <remy@une-issue.com> - 2026-05-20 23:30 +0200
  Bug#1137203: bnx2: ifupdown-hotplug fails at boot, no network, regression from 5.10.0-42 Ben Hutchings <ben@decadent.org.uk> - 2026-05-21 18:40 +0200
  Processed: Re: Bug#1137203: bnx2: ifupdown-hotplug fails at boot,  no network, regression from 5.10.0-42 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-05-21 18:40 +0200
  Bug#1137203: bnx2: ifupdown-hotplug fails at boot, no network, regression from 5.10.0-42 Ben Hutchings <ben@decadent.org.uk> - 2026-05-24 17:50 +0200
  Processed: Re: Bug#1137203: bnx2: ifupdown-hotplug fails at boot,  no network, regression from 5.10.0-42 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-05-24 17:50 +0200

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