I have been having this problem (intermittently) with Ubuntu Server 15.04 and now with 15.10 on my Intel NUC5CPYH for the last 3 months (since I bought it in fact). It only seems to happen when rebooting (never from a cold boot), and it doesn't always happen. I've attached an image of the console output. As my machine is normally headless it is particularly frustrating!
I use LVM but not for the root/system partition, only for /home. My system/root is at /dev/sda1 and formatted with ext4. I am using latest kernels downloaded from Ubuntu's http://kernel.ubuntu.com/~kernel-ppa/mainline/ (currently 4.2.5) - but as discussed here it doesn't seem to be a kernel issue. ** Attachment added: "Image of the console output" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/613273/+attachment/4509728/+files/IMG_20151017_072019871.jpg -- 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/613273 Title: run-init: nuking initramfs contents: directory not empty Status in initramfs-tools package in Ubuntu: Invalid Status in linux package in Ubuntu: Invalid Status in udev package in Ubuntu: Fix Released Status in initramfs-tools source package in Lucid: Invalid Status in linux source package in Lucid: Invalid Status in udev source package in Lucid: Fix Released Status in initramfs-tools source package in Maverick: Invalid Status in linux source package in Maverick: Invalid Status in udev source package in Maverick: Invalid Status in initramfs-tools source package in Natty: Invalid Status in linux source package in Natty: Invalid Status in udev source package in Natty: Invalid Bug description: In testing alpha-3 build 20100813.2, I found the following kernel oops: [ 0.473264] Kernel panic - not syncing: Attempted to kill init!^M [ 0.473277] Pid: 1, comm: run-init Not tainted 2.6.35-14-virtual #19-Ubuntu^M [ 0.473284] Call Trace:^M [ 0.473294] [<ffffffff815a0109>] panic+0x90/0x111^M [ 0.473303] [<ffffffff81006b1b>] ? __raw_callee_save_xen_irq_enable+0x11/0x26^M [ 0.473312] [<ffffffff8106276d>] forget_original_parent+0x33d/0x350^M [ 0.473318] [<ffffffff81061b94>] ? put_files_struct+0xc4/0xf0^M [ 0.473325] [<ffffffff8106279b>] exit_notify+0x1b/0x190^M [ 0.473330] [<ffffffff810640a5>] do_exit+0x1c5/0x3f0^M [ 0.473336] [<ffffffff81006afd>] ? __raw_callee_save_xen_irq_disable+0x11/0x1e^M [ 0.473343] [<ffffffff810643d7>] sys_exit+0x17/0x20^M [ 0.473349] [<ffffffff8100a0f2>] system_call_fastpath+0x16/0x1b^M This happened only once in my testing so far today (dozens of boots). I'm attaching the console log of failed instance. The instance that reported this bug is same ami/region different instance. ProblemType: Bug DistroRelease: Ubuntu 10.10 Package: linux-image-2.6.35-14-virtual 2.6.35-14.19 Regression: Yes Reproducible: No ProcVersionSignature: User Name 2.6.35-14.19-virtual 2.6.35 Uname: Linux 2.6.35-14-virtual x86_64 AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access /dev/snd/: No such file or directory AplayDevices: Error: [Errno 2] No such file or directory Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory CurrentDmesg: [ 12.900041] eth0: no IPv6 routers present Date: Wed Aug 4 01:19:11 2010 Ec2AMI: ami-09c3bc5b Ec2AMIManifest: ubuntu-images-testing-ap-southeast-1/ubuntu-maverick-daily-amd64-server-20100803.2.manifest.xml Ec2AvailabilityZone: ap-southeast-1b Ec2InstanceType: m1.large Ec2Kernel: aki-11d5aa43 Ec2Ramdisk: unavailable Frequency: Once a week. Lspci: Lsusb: Error: command ['lsusb'] failed with exit code 1: ProcCmdLine: root=LABEL=uec-rootfs ro ProcEnviron: LANG=en_US.UTF-8 SHELL=/bin/bash ProcModules: acpiphp 18752 0 - Live 0xffffffffa0000000 SourcePackage: linux To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/613273/+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