This bug was fixed in the package systemd - 237-3ubuntu10.26
---------------
systemd (237-3ubuntu10.26) bionic; urgency=medium
[ You-Sheng Yang ]
* d/p/d/Revert-udev-network-device-renaming-immediately-give.patch:
- udev: drop Revert-udev-network-device-renaming-immediately-give.patch
The removing patch was for the already deprecated
"75-persistent-net-generator.rules" based interface renaming mechanism,
and it's causing unnecessary problem when a system happends to NICs with
same MAC address, e.g. Dell's MAC address pass-thru. (LP: #1837700)
[ Shih-Yuan Lee (FourDollars) ]
* d/p/hwdb-revert-airplane-mode-keys-handling-on-Dell.patch:
- hwdb: revert airplane mode keys handling on Dell
That reverts some commits those created double key events issues on some
Dell laptops. (LP: #1740894)
-- Shih-Yuan Lee (FourDollars) <sy...@canonical.com> Wed, 07 Aug 2019
17:56:02 +0800
** Changed in: systemd (Ubuntu Bionic)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1837700
Title:
Dell system takes a long time to connect network with external dock
Status in HWE Next:
New
Status in OEM Priority Project:
In Progress
Status in systemd package in Ubuntu:
Fix Released
Status in systemd source package in Bionic:
Fix Released
Status in systemd source package in Disco:
Fix Released
Status in systemd source package in Eoan:
Fix Released
Bug description:
update for SRU process:
[Impact]
1. On system featured mac passthrough, e.g., Dell/Lenovo laptop, or system
occasionally install two USB ethernet with same MAC address, the system will
suffer 90 seconds for network interface renaming mechanism before the last USB
ethernet interface to activate.
[Test Case]
1. Install ubuntu on Dell laptop.
2. Connect the Dell laptop with two Realtek 8153 USB ethernet dongle. Users
can observe the last one will take 90 seconds for renaming to rename0.
3. Users can also find that the two USB ethernet have the same MAC address.
[Regression Potential]
To resolve the issue, drop a debian patch from systemd package. The debian
patch is to revert an upstream commit to support
75-persistent-net-generator.rules udev rule. Since the udev rule is deprecated,
the regression potential should be relatively low.
-----------------------------------
Dell has a feature called MAC addrss passthrough[1] that would force usb
ethernet adapters to be assigned with a predefined MAC address stored in BIOS
or so. This feature has been landed to mainline kernel in driver r8152[2]. So
whenever a r8152 managed device is plugged into Dell devices with MAC addrss
passthrough enabled, this driver will set NIC MAC to a predefined one.
And some Dell devices have already one built-in r8152 NIC port. On
these devices, when a second r8152 NIC is plugged in, a Debian
originated udev rules file 73-usb-net-by-mac.rules[3] will invoke udev
built-in command `net_id` to give a persistent name, and that will be
based on MAC address. However, since the system has already
initialized the built-in r8152 NIC with that name, renaming the second
interface with this name will always fail.
While Debian still carries a patch called "Revert-udev-network-device-
renaming-immediately-give.patch"[4] that tries to keep support of
already deprecated "75-persistent-net-generator.rules" based interface
renaming mechanism, this patch also propagated into Ubuntu[5]. This
patch will retry renaming with a 90 seconds timeout when the error
code is -EEXIST, so the uevent processing will always be blocked in
the last ifrename step in the victim system.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: udev 237-3ubuntu10.24 [modified: lib/udev/rules.d/50-firmware.rules
lib/udev/rules.d/50-udev-default.rules
lib/udev/rules.d/73-special-net-names.rules
lib/udev/rules.d/73-usb-net-by-mac.rules]
ProcVersionSignature: Ubuntu 4.15.0-1043.48-oem 4.15.18
Uname: Linux 4.15.0-1043-oem x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
CustomUdevRuleFiles: 70-snap.core.rules 95-oem-hotkey-osd.rules
Date: Wed Jul 24 15:30:59 2019
DistributionChannelDescriptor:
# This is the distribution channel descriptor for the OEM CDs
# For more information see
http://wiki.ubuntu.com/DistributionChannelDescriptor
canonical-oem-somerville-bionic-amd64-20180608-47+beaver-jorah+X90
InstallationDate: Installed on 2019-07-03 (20 days ago)
InstallationMedia: Ubuntu 18.04 "Bionic" - Build amd64 LIVE Binary
20180608-09:38
MachineType: Dell Inc. Latitude 7424 Rugged Extreme
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-1043-oem.efi.signed
root=UUID=5da90c85-3500-49a2-b989-71a604f9eec4 ro mem_sleep_default=deep quiet
splash systemd.log_level=debug udev.log-priority=debug log_buf_len=8M
vt.handoff=1
SourcePackage: systemd
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/27/2019
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.5.0
dmi.board.name: 0Y7FK3
dmi.board.vendor: Dell Inc.
dmi.board.version: X03
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.5.0:bd05/27/2019:svnDellInc.:pnLatitude7424RuggedExtreme:pvr:rvnDellInc.:rn0Y7FK3:rvrX03:cvnDellInc.:ct10:cvr:
dmi.product.family: Latitude
dmi.product.name: Latitude 7424 Rugged Extreme
dmi.sys.vendor: Dell Inc.
[1]:
https://www.dell.com/support/article/tw/zh/twdhs1/sln301147/what-is-mac-address-pass-through?lang=en
[2]:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/usb/r8152.c
[3]:
https://salsa.debian.org/systemd-team/systemd/blob/master/debian/extra/rules/73-usb-net-by-mac.rules
[4]:
https://salsa.debian.org/systemd-team/systemd/blob/master/debian/patches/debian/Revert-udev-network-device-renaming-immediately-give.patch
[5]:
https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/tree/debian/patches/debian/Revert-udev-network-device-renaming-immediately-give.patch?h=ubuntu-bionic
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