We should probably also report this upstream, since it still affects current mainline. https://wiki.ubuntu.com/Bugs/Upstream/kernel
We can also perform a kernel bisect to identify the commit that introduced this bug. We would first need to identify the last kernel version that did not have the bug and the first version that did. Can you test the following kernels: v4.6 Final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-yakkety/ v4.8 Final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8/ v4.10 Final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.10/ You don't have to test every kernel, just up until the kernel that first has this bug. Thanks in advance! ** Changed in: linux (Ubuntu) Importance: Undecided => High ** Tags added: kernel-da-key ** Also affects: linux (Ubuntu Bionic) Importance: High Status: Confirmed ** Also affects: linux (Ubuntu Artful) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Artful) Importance: Undecided => High ** Changed in: linux (Ubuntu Artful) Status: New => Triaged ** Changed in: linux (Ubuntu Bionic) Status: Confirmed => Triaged ** Tags added: kernel-key ** Tags added: performing-bisect -- 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/1761626 Title: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el Status in linux package in Ubuntu: Triaged Status in linux source package in Artful: Triaged Status in linux source package in Bionic: Triaged Bug description: When upgrading to bionic on a qemu ppc64el instance, the 4.15.0 kernel panics before initrd. Going back to xenial 4.4.0 works correctly. linux-image-4.15.0-13-generic: Installed: 4.15.0-13.14 Candidate: 4.15.0-13.14 Version table: *** 4.15.0-13.14 500 500 http://nibbler.snowman.lan/deb-proxy/ubuntu-ports bionic/main ppc64el Packages 100 /var/lib/dpkg/status ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-13-generic 4.15.0-13.14 ProcVersionSignature: Ubuntu 4.4.0-119.143-generic 4.4.114 Uname: Linux 4.4.0-119-generic ppc64le .var.log.platform: Error: [Errno 13] Permission denied: '/var/log/platform' AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Apr 5 16:11 seq crw-rw---- 1 root audio 116, 33 Apr 5 16:11 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.9-0ubuntu2 Architecture: ppc64el ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Thu Apr 5 16:13:28 2018 HibernationDevice: RESUME=UUID=2e904a57-3ce7-4b31-97ed-6c63b81b2221 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub PciMultimedia: ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinux-4.4.0-119-generic root=UUID=294515c8-75f2-4996-8e4f-a838e6c75804 ro ProcLoadAvg: 3.04 2.18 0.92 3/119 1643 ProcLocks: 1: POSIX ADVISORY WRITE 1225 00:12:470 0 EOF 2: POSIX ADVISORY WRITE 841 00:12:459 0 EOF 3: FLOCK ADVISORY WRITE 832 00:12:449 0 EOF 4: POSIX ADVISORY WRITE 802 00:12:432 0 EOF 5: POSIX ADVISORY WRITE 350 00:12:294 0 EOF ProcSwaps: Filename Type Size Used Priority /dev/vda3 partition 1408960 0 -1 ProcVersion: Linux version 4.4.0-119-generic (buildd@bos02-ppc64el-006) (gcc version 5.4.0 20160609 (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.9) ) #143-Ubuntu SMP Mon Apr 2 16:08:02 UTC 2018 RelatedPackageVersions: linux-restricted-modules-4.4.0-119-generic N/A linux-backports-modules-4.4.0-119-generic N/A linux-firmware 1.173 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' SourcePackage: linux UpgradeStatus: Upgraded to bionic on 2018-04-05 (0 days ago) cpu_cores: Number of cores present = 1 cpu_coreson: Number of cores online = 1 cpu_smt: Error: command ['ppc64_cpu', '--smt'] failed with exit code 255: Machine is not SMT capable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1761626/+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
