*** 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
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You received this bug notification because you are a member of Kernel
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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.
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