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 v4.17 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/v4.17-rc4 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete ** Tags added: kernel-da-key -- 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/1752961 Title: With kernel 4.13 btrfs scans for devices before all devices have been discovered Status in linux package in Ubuntu: Incomplete Bug description: See attached dmesg outputs for booting kernels 4.11.x (working) and 4.13.x (not working). dmesg-4.11.0-14-good.txt shows the dmesg output when booting kernel 4.11.x. btrfs scans for devices after all 4 (sda, sdb, sdc, sdd) of the devices have been discovered by the kernel. The btrfs RAID1 filesystem mounts, and everything is good. dmesg-4.13.0-36-fail.txt shows the dmesg output when booting kernel 4.13.x. btrfs scans for devices after only 2 (sda, sdb) of the devices have been discovered by the kernel. The btrfs RAID1 filesystem fails to mount ("failed to read the system array: -5"). The remaining 2 devices (sdc, sdd) are discovered by the kernel immediately afterward. At the end of the log, I run `btrfs device scan` and mount the filesystem manually. Hardware: HP ProLiant MicroServer Gen8 4x WDC WD20EFRX --- AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access '/dev/snd/': No such file or directory AplayDevices: aplay: device_list:270: no soundcards found... ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 ArecordDevices: arecord: device_list:270: no soundcards found... DistroRelease: Ubuntu 18.04 InstallationDate: Installed on 2015-10-15 (933 days ago) InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422.1) MachineType: HP ProLiant MicroServer Gen8 Package: linux (not installed) ProcEnviron: TERM=linux PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.15.0-20-generic root=UUID=d976ab07-8377-46dd-ac6c-f5f7312a8305 ro rootflags=subvol=@ rootdelay=10 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. Tags: bionic apport-hook-error Uname: Linux 4.15.0-20-generic x86_64 UnreportableReason: This report is about a package that is not installed. UpgradeStatus: Upgraded to bionic on 2018-05-05 (0 days ago) UserGroups: _MarkForUpload: True dmi.bios.date: 07/16/2015 dmi.bios.vendor: HP dmi.bios.version: J06 dmi.chassis.type: 7 dmi.chassis.vendor: HP dmi.modalias: dmi:bvnHP:bvrJ06:bd07/16/2015:svnHP:pnProLiantMicroServerGen8:pvr:cvnHP:ct7:cvr: dmi.product.family: ProLiant dmi.product.name: ProLiant MicroServer Gen8 dmi.sys.vendor: HP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1752961/+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
