Public bug reported:
Whenever I power down, upon next boot the system just hangs with Ubuntu
at the bottom of the screen and the circle above going around and around
forever.
It happens nearly every ime I power down, but not every single time.
Rebooting rather that powering down works quite often.
At first when thing hung I would just hard power off by holding down the
power key. Then I'd use the live usb I installed with to run Disks app.
More often than not the vfat W95 FAT32 partition at sda1 was damaged.
The first repair would fail. The second repair would succeed. And then
I'd be able to boot into my system again.
After chatting about it a little with EriC^^ in #ubuntu on IRC I learned
how to do Alt+Fn+PrtSc S, U, B or S, U, O. Sometimes just doing either
of those on the hang screen would result in it booting up fine next
time. Sometimes not.
After installing 20.04 (a fresh install on a brand new Samsung 860 EVO
1TB sdd hard drive) I copied back all the files in my home direct that
I'd backed from 18.04, including hidden files. This confused Firefox so
I had to delete related folders and then unintall and reinstall to stop
Firefox being confused. This might have nothing whatsoever to do with
this issue, just mentioning it just in case something else is similarly
confused. EriC^^ suggested I try adding another user and seeing if the
issue went away. On the first test (and some but not all subsequent
tests) it did seem that TestUser could power down and reboot fine. But
actually it didn't seem that different.
I powered down, rebooted, used live usb to repair Disk over and over
again for hours trying to find a pattern as to when it happened and when
it didn't, but failed to find any fixed pattern.
Eventually at one point it was taking a while to power down (or reboot,
I forget) and so I hit Esc and spotted that it had failed to unmount
/cdrom ...
... so then I thought I'd try completely removing my DVD/CDRW drive and
that made the issue go away.
Before filing this I put the DVD drive back in (but haven't since
rebooted), so not sure if apport has picked up it's details or not?
Perhaps I'll need to re-file the bug after booting with it present?
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: plymouth 0.9.4git20200323-0ubuntu6
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Thu May 7 15:09:23 2020
DefaultPlymouth: /usr/share/plymouth/themes/bgrt/bgrt.plymouth
InstallationDate: Installed on 2020-04-26 (11 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
Lsusb:
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 147e:2016 Upek Biometric Touchchip/Touchstrip
Fingerprint Sensor
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Lsusb-t:
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M
|__ Port 3: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 12M
MachineType: LENOVO 4384WCV
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-29-generic
root=UUID=9ce94e7a-53bd-4507-ae31-93a2392b2da2 ro quiet splash vt.handoff=7
ProcEnviron:
LANGUAGE=en_GB:en
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_GB.UTF-8
SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-29-generic
root=UUID=9ce94e7a-53bd-4507-ae31-93a2392b2da2 ro quiet splash vt.handoff=7
SourcePackage: plymouth
TextPlymouth: /usr/share/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/26/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 6MET81WW (1.41 )
dmi.board.name: 4384WCV
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr6MET81WW(1.41):bd10/26/2010:svnLENOVO:pn4384WCV:pvrThinkPadT510:rvnLENOVO:rn4384WCV:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad T510
dmi.product.name: 4384WCV
dmi.product.version: ThinkPad T510
dmi.sys.vendor: LENOVO
** Affects: plymouth (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
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https://bugs.launchpad.net/bugs/1877388
Title:
If DVD drive is present system very often fails to start-up
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