what's in the dvd rom? is it empty or does it have some CD that has a package pool which apt-cdrom tries to mount (and has mounted)?
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1877388 Title: If DVD drive is present system very often fails to start-up Status in linux package in Ubuntu: Confirmed Bug description: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1877388/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
