I managed to mount the root volume from the kernel 5 boot fail busybox by explicitly adding the correct device=/dev/sdXY names to the btrfs mount options. After this one time manual mount, kernel 5 seems to boot fine now. Seems like the kernel 5 btrfs driver "fixed" whatever it had trouble with.
Can't verify if kernel 5.2 would have fixed the problem automatically though.. -- 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/1831020 Title: BTRS Raid boot failure Status in linux package in Ubuntu: Confirmed Bug description: After upgrading from Ubuntu 18.10 to 19.04 my BTRFS Raid0 based system doesn't boot anymore. It drops to busybox because of an error mounting the root file system. Manually trying to mount root reveals an error message saying that the second raid volume could not be found by UUID. But the output from `blkid` shows that the volume with the UUID in question exists. Booting the system using the previous kernel 4.18 from advanced boot options works flawlessly. ProblemType: Bug DistroRelease: Ubuntu 19.04 Package: linux-image-generic 5.0.0.15.16 ProcVersionSignature: Ubuntu 4.18.0-20.21-generic 4.18.20 Uname: Linux 4.18.0-20-generic x86_64 ApportVersion: 2.20.10-0ubuntu27 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: pwuertz 1702 F.... pulseaudio Date: Thu May 30 09:03:47 2019 HibernationDevice: RESUME=UUID=d477a5f5-0176-4b8a-937a-b97db8fef8d4 InstallationDate: Installed on 2016-04-28 (1126 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) MachineType: Sony Corporation VPCZ21C5E ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.18.0-20-generic root=UUID=aa8fbe5e-c722-43e9-b8fc-9d7f60818a46 ro rootflags=subvol=@ quiet splash PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-4.18.0-20-generic N/A linux-backports-modules-4.18.0-20-generic N/A linux-firmware 1.178.1 SourcePackage: linux UpgradeStatus: Upgraded to disco on 2019-05-30 (0 days ago) dmi.bios.date: 06/16/2011 dmi.bios.vendor: INSYDE dmi.bios.version: R0170H5 dmi.board.asset.tag: N/A dmi.board.name: VAIO dmi.board.vendor: Sony Corporation dmi.board.version: N/A dmi.chassis.asset.tag: N/A dmi.chassis.type: 10 dmi.chassis.vendor: Sony Corporation dmi.chassis.version: N/A dmi.modalias: dmi:bvnINSYDE:bvrR0170H5:bd06/16/2011:svnSonyCorporation:pnVPCZ21C5E:pvrJ004QCLG:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A: dmi.product.family: VAIO dmi.product.name: VPCZ21C5E dmi.product.sku: N/A dmi.product.version: J004QCLG dmi.sys.vendor: Sony Corporation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1831020/+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
