[regression] login screen frozen after kernel update 4.13.0-38-generic (but 4.13.0-37-generic works)

[Joe Liau]

Ubuntu 17.10
4.13.0-38-generic
Asus UX305FA

When using the 4.13.0-38-generic kernel, the login screen is completely frozen and unresponsive.
Using a different kernel works fine.
---
ApportVersion: 2.20.7-0ubuntu3.8
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: obsidian 1922 F.... pulseaudio
 /dev/snd/controlC1: obsidian 1922 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 17.10
EcryptfsInUse: Yes
InstallationDate: Installed on 2017-04-14 (371 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 064e:9700 Suyin Corp. Asus Integrated Webcam
 Bus 001 Device 002: ID 8087:0a2a Intel Corp.
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: ASUSTeK COMPUTER INC. UX305FA
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-38-generic.efi.signed root=UUID=930dc116-4058-44a2-89bf-a754585181ff ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 4.13.0-38.43-generic 4.13.16
RelatedPackageVersions:
 linux-restricted-modules-4.13.0-38-generic N/A
 linux-backports-modules-4.13.0-38-generic N/A
 linux-firmware 1.169.3
Tags: artful
Uname: Linux 4.13.0-38-generic x86_64
UpgradeStatus: Upgraded to artful on 2017-10-20 (181 days ago)
UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 03/26/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX305FA.208
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX305FA
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX305FA.208:bd03/26/2015:svnASUSTeKCOMPUTERINC.:pnUX305FA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX305FA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: UX
dmi.product.name: UX305FA
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

[Daniel van Vugt (vanvugt)]

Please try to find the closest two kernel versions where one works and the other doesn't.

[Joe Liau (joe)]

Oops, I made a mistake. Here is the case:

4.13.0-38-generic (DOESN'T WORK)
4.13.0-37-generic (WORKS)

[Daniel van Vugt (vanvugt)]

Sounds like that contradicts the bug description: "When using the 4.13.0-37-generic kernel, the login screen is completely frozen and unresponsive."

If the description is wrong then please change it.

[Joe Liau (joe)]

Updated description.

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

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1765110

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

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

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the proposed kernel and post back if it resolves this bug?
See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed.

Thank you in advance!

[Joe Liau (joe)]

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[Joe Liau (joe)]

Somehow I was able to boot to the problem kernel just now without a freeze. But it took multiple booting tries. Then I ran apport.

I will try to see if it persists and also try the proposed kernel.

[Joe Liau (joe)]

The proposed kernel 4.13.0-39-generic is working.