Regression, system unresponsible few seconds after showing gdm3, Sysrq doesn't work

[Bartłomiej Żogała]

After upgrading from ubuntu 17.04 to 17.10 with new kernel 4.13.0-37-generic system stopped to work few seconds after showing display manager(a while after WiFi changes icon to connected). This his hard crash, SysRq command doesn't work. This is not an issue on the same environment with old kernel 4.10.0-43-generic booted

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: linux-image-4.13.0-37-generic 4.13.0-37.42
ProcVersionSignature: Ubuntu 4.10.0-43.47-generic 4.10.17
Uname: Linux 4.10.0-43-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: nusch 3173 F.... pulseaudio
 /dev/snd/controlC0: nusch 3173 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Sat Mar 31 12:17:44 2018
HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1
InstallationDate: Installed on 2015-05-08 (1058 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
MachineType: Dell Inc. XPS 13 9343
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.10.0-43-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro crashkernel=384M-:128M quiet splash log_buf_len=1M crashkernel=384M-:128M
RelatedPackageVersions:
 linux-restricted-modules-4.10.0-43-generic N/A
 linux-backports-modules-4.10.0-43-generic N/A
 linux-firmware 1.169.3
SourcePackage: linux
UpgradeStatus: Upgraded to artful on 2018-03-31 (0 days ago)
dmi.bios.date: 01/23/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A15
dmi.board.name: 09K8G1
dmi.board.vendor: Dell Inc.
dmi.board.version: A02
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA15:bd01/23/2018:svnDellInc.:pnXPS139343:pvr:rvnDellInc.:rn09K8G1:rvrA02:cvnDellInc.:ct9:cvr:
dmi.product.name: XPS 13 9343
dmi.sys.vendor: Dell Inc.

[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 v4.16 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/v4.16

[Bartłomiej Żogała (nusch)]

I installed linux-kernel-4.16.0-041600-generic, I'm able to boot it but Broadcomm WiFI driver which I supsected as a reason fails:
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.16.0-041600-generic /boot/vmlinuz-4.16.0-041600-generic
run-parts: executing /etc/kernel/postinst.d/dkms 4.16.0-041600-generic /boot/vmlinuz-4.16.0-041600-generic
ERROR (dkms apport): kernel package linux-headers-4.16.0-041600-generic is not supported
Error! Bad return status for module build on kernel: 4.16.0-041600-generic (x86_64)
Consult s/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/make.log for more information.
ERROR (dkms apport): kernel package linux-headers-4.16.0-041600-generic is not supported
Error! Bad return status for module build on kernel: 4.16.0-041600-generic (x86_64)
Consult /var/lib/dkms/vboxhost/5.0.32/build/make.log for more information.
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.16.0-041600-generic /boot/vmlinuz-4.16.0-041600-generic
update-initramfs: Generating /boot/initrd.img-4.16.0-041600-generic
W: Possible missing firmware /lib/firmware/i915/skl_dmc_ver1_27.bin for module i915
W: Possible missing firmware /lib/firmware/i915/kbl_dmc_ver1_04.bin for module i915

Attached.
Meanwhile there was standard kernel upgrade 4.13.0-39-generic and it does work(including WiFi and with secure boot enabled(after manually signing wl.ko module)) in opposite to 4.13.0-37-generic and AFAIR 4.13.0-38-generic.

So my problem was solved but I'm open do debug it further. One thing which changed also I did:
apt-get install libelf-dev because of some warning from DKMS suggesting that during 4.16 kernel post-install.

[Kai-Heng Feng (kaihengfeng)]

If this issue doesn't happen to Bionic (which uses v4.15 based kernel), I think it's reasonable to upgrade. The bcmwl should work be able to build against v4.15.

[Andy Whitcroft (apw)]

This bug was nominated against a series that is no longer supported, ie artful. The bug task representing the artful nomination is being closed as Won't Fix.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.