System hangs during boot at "Started configure plugged in printer"

[Michael Ehling]

System: Lenovo T430s with HP OfficeJet Pro 8600 attached via usb hub

Followed general bug reporting instructions (including https://wiki.ubuntu.com/Bugs/FindRightPackage). This may be kernel related, not xorg.

What I tried: rebooting
What I expected: to see the login screen
What happened: booting hangs

Rebooted using 'E' option in grub to remove splash and quiet. Saw system hang at "Started configure plugged in printer"

When I unplug the USB hub (to which the printer is connected), I can reboot and login fine then reinsert USB hub.

After this "fix," I can reboot fine without unplugging anything. This bug appears to happen right after a system update (running Software Updater and there are kernel bits to update).

This is new behaviour; I had the same system setup running and booting fine under 18.04

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: xorg 1:7.7+19ubuntu8
ProcVersionSignature: Ubuntu 4.18.0-9.10-generic 4.18.12
Uname: Linux 4.18.0-9-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.10-0ubuntu11
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 12 15:48:22 2018
DistUpgraded: Fresh install
DistroCodename: cosmic
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21fb]
InstallationDate: Installed on 2018-10-02 (10 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Beta amd64 (20180927)
MachineType: LENOVO 2356CU8
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-9-generic root=UUID=e307efee-e562-4d24-9632-4a97a84073ee ro quiet splash vt.handoff=1
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/22/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: G7ET91WW (2.51 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2356CU8
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: 529944
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrG7ET91WW(2.51):bd01/22/2013:svnLENOVO:pn2356CU8:pvrThinkPadT430s:rvnLENOVO:rn2356CU8:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad T430s
dmi.product.name: 2356CU8
dmi.product.sku: LENOVO_MT_2356
dmi.product.version: ThinkPad T430s
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.13.1+18.10.20180930-0ubuntu1
version.libdrm2: libdrm2 2.4.95-1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.2-0ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.2-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.1-3ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-3

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

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

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-rc8

[Michael Ehling (0-mike-1)]

This started happening after the distribution upgrade from Bionic 18.04 which I did in the first few days of October 2018. (Sorry for lack of specificity here.)

Tested the latest upstream kernel: 4.19rc8. Problem still exists. I set the take 'kernel-bug-exists-upstream.'

Set status to 'confirmed.'

Thanks!

[Kai-Heng Feng (kaihengfeng)]

Seems like it worked on older kernels. Can you find out which on works?

[Michael Ehling (0-mike-1)]

I would like to but I have a correction to report: this system never had 18.04 LTS (or any prior versions) on it. I had remembered upgrading a different machine to Cosmic at the same time as I had done a fresh install on this machine.

So we don't know if this problem existed in prior versions of the kernel.