DHCP server and client not working since kernel 4.15.0-32

[Bin Zhang]

I installed Ubuntu server 18.04 on HP Proliant BL460c Gen8 server blades. I set up DHCP server for PXE boot. It was working, but since kernel update with version 4.15.0-32, PXE boot no longer works. DHCP server logs show "5 bad udp checksums in 5 packets" in a row. DHCP client is also not working on the machine due to similar errors. I switched back to kernel version 4.15-0-29 and it works again. I suspect the newer kernel might have introduced a bug about the network adapter driver. Thanks.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-32-generic 4.15.0-32.35
ProcVersionSignature: Ubuntu 4.15.0-32.35-generic 4.15.18
Uname: Linux 4.15.0-32-generic x86_64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116, 1 Aug 30 08:56 seq
 crw-rw---- 1 root audio 116, 33 Aug 30 08:56 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Date: Thu Aug 30 09:08:11 2018
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
MachineType: HP ProLiant BL460c Gen8
PciMultimedia:

ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 mgadrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-32-generic root=UUID=0a9aa0b0-9a67-11e8-a1dc-fc15b41d0ee0 ro maybe-ubiquity
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-32-generic N/A
 linux-backports-modules-4.15.0-32-generic N/A
 linux-firmware 1.173.1
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/20/2013
dmi.bios.vendor: HP
dmi.bios.version: I31
dmi.chassis.type: 28
dmi.chassis.vendor: HP
dmi.modalias: dmi:bvnHP:bvrI31:bd12/20/2013:svnHP:pnProLiantBL460cGen8:pvr:cvnHP:ct28:cvr:
dmi.product.family: ProLiant
dmi.product.name: ProLiant BL460c Gen8
dmi.sys.vendor: HP

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.19 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.19-rc2

[Launchpad Janitor (janitor)]

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[Launchpad Janitor (janitor)]

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