I started a "Reverse" kernel bisect between v4.10 final and v4.11-rc1. The kernel bisect will require testing of about 7-10 test kernels.
I built the first test kernel, up to the following commit: caa59428971d5ad81d19512365c9ba580d83268c The test kernel can be downloaded from: http://kernel.ubuntu.com/~jsalisbury/lp1809168 Can you test that kernel and report back if it has the bug or not? I will build the next test kernel based on your test results. Thanks in advance -- 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/1809168 Title: FIPS and Ubuntu standard kernels prior to 4.11.0 won't boot; root device not found Status in linux package in Ubuntu: Triaged Status in linux source package in Xenial: Triaged Bug description: [IMPACT] Booting of the Xenial-based FIPS kernel packages failed with disk not found errors on amd64. This was also observed on standard Ubuntu kernels prior to 4.11.0. FIPS ------ 1. linux-image-4.4.0-1002-fips <-- FAIL 2. linux-image-4.4.0-1006-fips <-- FAIL UBUNTU ------------ 1. Bionic kernels all WORK 2. Artful kernels: Ubuntu-4.11.0-1.6 <-- WORKS Ubuntu-4.10.0-26.30 <-- FAILS 3. Xenial kernels: Ubuntu-hwe-4.11.0-12.17_16.04.1 <--- WORKS Ubuntu-hwe-4.10.0-43.47_16.04.1 <--- FAILS Ubuntu-lts-* <--- ALL FAIL Ubuntu-4.4.0-* <--- ALL FAIL We have narrowed down the window to be: 4.11.0-1.6 (custom build) <--- WORKS 4.10.0-43.47~16.04.1 <-- FAILS Also works: https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11/linux-image-4.11.0-041100-generic_4.11.0-041100.201705041534_amd64.deb Symptoms ------------- System cannot find the root disk and drops into an initramfs shell: mdadm script local-block "CREATE group disk not found" "Gave up waiting for root device. Common problems: - Boot args (cat /proc/cmdline) - Check rootdelay=... - Check root= ... - Missing modules (cat /proc/modules; ls/dev) ALERT! UUID=... does not exist. Dropping to a shell! ... (initramfs)_ There does not appear to be any workaround so far. The disks are encrypted SSDs. Attaching commit list between the last known failing Artful kernel and earliest known working kernel (adjacent tags) and other info. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1809168/+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
