** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Hirsute)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1945707
Title:
BCM57800 SRIOV bug causes interfaces to disappear
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Bionic:
New
Status in linux source package in Focal:
New
Status in linux source package in Hirsute:
New
Bug description:
Works with focal kernel 5.4.0-80
Broken with focal kernel 5.4.0-88
On a Dell R720 with the BCM57800 based 1/10 Gigabit Integrated Network
cards Kernel 5.11.22-3 causes half of the network interfaces to
disappear specifically the 1gb ports. Commands like "ip link show" and
"dmesg" no longer show eno3 and eno4 nor any other interface name for
these ports. I've read the note in the release notes and this does not
appear to be a case of the interface changing names, the 3rd and 4th
interface don't show up at all.
The card is based on the BCM57800 chipset and has two SFP+ and two
gigabit ports on the same card. Commands like "ip link show" no longer
show ports 3 and 4. "lspci" still shows four items. dmesg only shows
the first two interfaces.
This problem seems to be known upstream, and seems to be a regression.
More information at https://bugzilla.proxmox.com/show_bug.cgi?id=3558
This is being seen at a customer during an openstack install. It would
be appreciated if a workaround could be provided or the fix could be
prioritized. Using standard Focal 20.04 LTS kernel (it installs ok
with the working kernel then upgrades to the non-working one -- this
is done through maas and is difficult to control).
Tested other kernels like hwe-* and all seem to be affected too.
Client does not want to disable SRIOV on whole card and also cannot
disable only ports 3/4 (the bios will not allow it).
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