Note: Original discussion about this issue from July 2025 is in bug
#2115790
** Changed in: netplan.io (Ubuntu)
Assignee: (unassigned) => Lukas Märdian (slyon)
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https://bugs.launchpad.net/bugs/2126938
Title:
network daemon cannot change link-offloading settings
Status in linux package in Ubuntu:
New
Status in netplan.io package in Ubuntu:
Triaged
Bug description:
netplan.io is showing new autopkgtest failures in Questing VMs, when
testing against Linux kernel 6.17
Interestingly, the same failure happens with both the systemd-networkd
and NetworkManager daemons. Also, the issue does NOT happen inside the
armhf runners (containers) that are using an old 6.8 container host
kernel.
Specifically:
942s ======================================================================
942s FAIL: test_link_offloading
(__main__.TestNetworkManager.test_link_offloading)
942s ----------------------------------------------------------------------
942s Traceback (most recent call last):
942s File
"/tmp/autopkgtest.urTG2T/build.w51/src/tests/integration/ethernets.py", line
331, in test_link_offloading
942s self.assertIn(b'tcp-segmentation-offload: off', out)
942s ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
942s AssertionError: b'tcp-segmentation-offload: off' not found in b'Features
for eth42:\nrx-checksumming: off\ntx-checksumming: off\n\ttx-checksum-ipv4: off
[fixed]\n\ttx-checksum-ip-generic: off\n\ttx-checksum-ipv6: off
[fixed]\n\ttx-checksum-fcoe-crc: off [fixed]\n\ttx-checksum-sctp:
off\nscatter-gather: on\n\ttx-scatter-gather: on\n\ttx-scatter-gather-fraglist:
on\ntcp-segmentation-offload: on\n\ttx-tcp-segmentation:
off\n\ttx-tcp-ecn-segmentation: off [requested
on]\n\ttx-tcp-mangleid-segmentation: off [requested
on]\n\ttx-tcp6-segmentation: off\n\ttx-tcp-accecn-segmentation:
on\ngeneric-segmentation-offload: off\ngeneric-receive-offload:
off\nlarge-receive-offload: off [fixed]\nrx-vlan-offload: on\ntx-vlan-offload:
on\nntuple-filters: off [fixed]\nreceive-hashing: off [fixed]\nhighdma:
on\nrx-vlan-filter: off [fixed]\nvlan-challenged: off [fixed]\ntx-gso-robust:
off [fixed]\ntx-fcoe-segmentation: off [fixed]\ntx-gre-segmentation:
on\ntx-gre-csum-segmentation: on\ntx-ipxip4-segmentation:
on\ntx-ipxip6-segmentation: on\ntx-udp_tnl-segmentation:
on\ntx-udp_tnl-csum-segmentation: on\ntx-gso-partial: off
[fixed]\ntx-tunnel-remcsum-segmentation: off [fixed]\ntx-sctp-segmentation:
on\ntx-esp-segmentation: off [fixed]\ntx-udp-segmentation: off [requested
on]\ntx-gso-list: on\ntx-nocache-copy: off\nloopback: off [fixed]\nrx-fcs: off
[fixed]\nrx-all: off [fixed]\ntx-vlan-stag-hw-insert:
on\nrx-vlan-stag-hw-parse: on\nrx-vlan-stag-filter: off
[fixed]\nl2-fwd-offload: off [fixed]\nhw-tc-offload: off
[fixed]\nesp-hw-offload: off [fixed]\nesp-tx-csum-hw-offload: off
[fixed]\nrx-udp_tunnel-port-offload: off [fixed]\ntls-hw-tx-offload: off
[fixed]\ntls-hw-rx-offload: off [fixed]\nrx-gro-hw: off [fixed]\ntls-hw-record:
off [fixed]\nrx-gro-list: off\nmacsec-hw-offload: off
[fixed]\nrx-udp-gro-forwarding: off\nhsr-tag-ins-offload: off
[fixed]\nhsr-tag-rm-offload: off [fixed]\nhsr-fwd-offload: off
[fixed]\nhsr-dup-offload: off [fixed]\n'
942s
942s ======================================================================
942s FAIL: test_link_offloading (__main__.TestNetworkd.test_link_offloading)
942s ----------------------------------------------------------------------
942s Traceback (most recent call last):
942s File
"/tmp/autopkgtest.urTG2T/build.w51/src/tests/integration/ethernets.py", line
331, in test_link_offloading
942s self.assertIn(b'tcp-segmentation-offload: off', out)
942s ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
942s AssertionError: b'tcp-segmentation-offload: off' not found in b'Features
for eth42:\nrx-checksumming: off\ntx-checksumming: off\n\ttx-checksum-ipv4: off
[fixed]\n\ttx-checksum-ip-generic: off\n\ttx-checksum-ipv6: off
[fixed]\n\ttx-checksum-fcoe-crc: off [fixed]\n\ttx-checksum-sctp:
off\nscatter-gather: on\n\ttx-scatter-gather: on\n\ttx-scatter-gather-fraglist:
on\ntcp-segmentation-offload: on\n\ttx-tcp-segmentation:
off\n\ttx-tcp-ecn-segmentation: off [requested
on]\n\ttx-tcp-mangleid-segmentation: off [requested
on]\n\ttx-tcp6-segmentation: off\n\ttx-tcp-accecn-segmentation:
on\ngeneric-segmentation-offload: off\ngeneric-receive-offload:
off\nlarge-receive-offload: off [fixed]\nrx-vlan-offload: on\ntx-vlan-offload:
on\nntuple-filters: off [fixed]\nreceive-hashing: off [fixed]\nhighdma:
on\nrx-vlan-filter: off [fixed]\nvlan-challenged: off [fixed]\ntx-gso-robust:
off [fixed]\ntx-fcoe-segmentation: off [fixed]\ntx-gre-segmentation:
on\ntx-gre-csum-segmentation: on\ntx-ipxip4-segmentation:
on\ntx-ipxip6-segmentation: on\ntx-udp_tnl-segmentation:
on\ntx-udp_tnl-csum-segmentation: on\ntx-gso-partial: off
[fixed]\ntx-tunnel-remcsum-segmentation: off [fixed]\ntx-sctp-segmentation:
on\ntx-esp-segmentation: off [fixed]\ntx-udp-segmentation: off [requested
on]\ntx-gso-list: on\ntx-nocache-copy: off\nloopback: off [fixed]\nrx-fcs: off
[fixed]\nrx-all: off [fixed]\ntx-vlan-stag-hw-insert:
on\nrx-vlan-stag-hw-parse: on\nrx-vlan-stag-filter: off
[fixed]\nl2-fwd-offload: off [fixed]\nhw-tc-offload: off
[fixed]\nesp-hw-offload: off [fixed]\nesp-tx-csum-hw-offload: off
[fixed]\nrx-udp_tunnel-port-offload: off [fixed]\ntls-hw-tx-offload: off
[fixed]\ntls-hw-rx-offload: off [fixed]\nrx-gro-hw: off [fixed]\ntls-hw-record:
off [fixed]\nrx-gro-list: off\nmacsec-hw-offload: off
[fixed]\nrx-udp-gro-forwarding: off\nhsr-tag-ins-offload: off
[fixed]\nhsr-tag-rm-offload: off [fixed]\nhsr-fwd-offload: off
[fixed]\nhsr-dup-offload: off [fixed]\n'
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