I'm afraid to report that I experienced a hang on boot today, using the
drm-tip kernel ("5.7.0-994.202005192206"). This time the hang occurred
before the LUKS password prompt to unlock the root filesystem. There
was a message printed to the screen, which I will attach shortly.
I was able to reboot with SysRq SUSB sequence and the laptop booted fine
next time.
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https://bugs.launchpad.net/bugs/1877889
Title:
Intermittent hangs on boot Ubuntu 20.04 on Lenovo E595
Status in linux package in Ubuntu:
Confirmed
Bug description:
Hello,
I see occasional hangs on boot. The hangs occur after entering the LUKS
decryption password for the root filesystem, and before the login screen is
displayed. The "/boot" filesystem is not encrypted, so the initramfs is
loading fine etc. The hangs are intermittent. Sometimes I don't see a hang
for 10+ boots in a row, and sometimes I'll get a hang 5 times in a row.
When the hang occurs the boot splash screen is visible (not the login
screen). The system is still responsive to SysRq keys, so I can
somewhat safely issue S+U+S+B sequence to try booting again without
corrupting much.
I have tried removing the "quiet splash" kernel parameters that are
enabled by default on Ubuntu desktop to see if any interesting
messages occur that way. So far however I have not experienced a hang
with "quiet splash" removed.
This system is a Lenovo E595 (Ryzen 3500U) with the latest BIOS from
Lenovo installed (v1.16), running Ubuntu 20.04 desktop. I am
submitting this bug using `ubuntu-bug linux-image-generic`, but I
don't know for sure if this is a kernel issue or something else.
I suspect my bug might be the same as this one already reported (
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1873594 ), but
I'm filing my own anyway as a means to capture more details of my
system.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-generic 5.4.0.29.34
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: paul 2507 F.... pulseaudio
/dev/snd/controlC0: paul 2507 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun May 10 20:09:53 2020
MachineType: LENOVO 20NFCTO1WW
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-29-generic
root=UUID=f466d4ea-c251-4721-b071-bd70c82f00e1 ro rootflags=subvol=@ splash
quiet vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.4.0-29-generic N/A
linux-backports-modules-5.4.0-29-generic N/A
linux-firmware 1.187
SourcePackage: linux
UpgradeStatus: Upgraded to focal on 2020-04-24 (15 days ago)
dmi.bios.date: 03/30/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: R11ET36W (1.16 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20NFCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvrR11ET36W(1.16):bd03/30/2020:svnLENOVO:pn20NFCTO1WW:pvrThinkPadE595:rvnLENOVO:rn20NFCTO1WW:rvrNotDefined:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad E595
dmi.product.name: 20NFCTO1WW
dmi.product.sku: LENOVO_MT_20NF_BU_Think_FM_ThinkPad E595
dmi.product.version: ThinkPad E595
dmi.sys.vendor: LENOVO
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