*** This bug is a duplicate of bug 1829620 *** https://bugs.launchpad.net/bugs/1829620
Thanks for testing, Jackneill. To explain, the "dis_ucode_ldr" option disables loading of microcode updates by Linux. Microcode updates are are binary blobs (no source code is available) which modify operation of a CPU until the next reboot. They are supplied by CPU manufacturers / vendors to mainboard manufacturers / vendors and are now more commonly shared with operating systems, too. Linux supports loading them into the CPU during early boot. Unfortunately, with the latest microcode update (which was released by the same time as the kernel updates you reported about on 19.04 and 18.04 LTS), your CPU seems to not behave reliably, causing a high percentage of your boots into Ubuntu to fail. This root cause is confirmed by using the dis_ucode_ldr kernel boot parameter, which, as you report, ensures your system boots up fine every time. I will now mark this bug report as a duplicate of bug #1829620 (I am convinced both Kai-Heng and TJ meant to point to the same bug report) and suggest you keep using "dis_ucode_ldr" temporarily until Intel releases a new microcode update and it becomes available in Ubuntu via https://packages.ubuntu.com/search?keywords=intel-microcode - the status of bug #1829620 should change to "fix released" at that time. Feel free to address me on IRC (#ubuntu) in case of any questions of a support nature, or add to the bug report if you would like to report more details on this issue. ** This bug has been marked a duplicate of bug 1829620 intel-microcode on ASUS makes kernel stuck during loading initramfs on bionic-updates, bionic-security -- 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/1829402 Title: Purple screen hangup during boot Status in linux package in Ubuntu: Confirmed Bug description: Specs: Ubuntu 19.04 fresh install, everything updated Firmware is latest (Bios version 300) Asus vivobook s14 LVM disk encryption Steps to reproduce: - Install ubuntu 19.04/18.10 - Reboot - Purple screen indefinitely Setting kernel cmdline args only to ro nomodeset seems solves it. After some debugging session with #ubuntu with different cmdline args, it seems now the default one works too. I have not edited anything, but now i am unable to reproduce it. ProblemType: Bug DistroRelease: Ubuntu 19.04 Package: linux-image-5.0.0-15-generic 5.0.0-15.16 ProcVersionSignature: Ubuntu 5.0.0-15.16-generic 5.0.6 Uname: Linux 5.0.0-15-generic x86_64 ApportVersion: 2.20.10-0ubuntu27 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: markbartos 1778 F.... pulseaudio Date: Thu May 16 17:15:07 2019 InstallationDate: Installed on 2019-05-16 (0 days ago) InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 13d3:3526 IMC Networks Bus 001 Device 002: ID 13d3:56c1 IMC Networks Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: ASUSTeK COMPUTER INC. VivoBook_ASUSLaptop X430FA_S430FA ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.0.0-15-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=1 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-5.0.0-15-generic N/A linux-backports-modules-5.0.0-15-generic N/A linux-firmware 1.178.1 SourcePackage: linux StagingDrivers: r8822be UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/22/2018 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: X430FA.300 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: X430FA dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX430FA.300:bd11/22/2018:svnASUSTeKCOMPUTERINC.:pnVivoBook_ASUSLaptopX430FA_S430FA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX430FA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.family: VivoBook dmi.product.name: VivoBook_ASUSLaptop X430FA_S430FA dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1829402/+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