After the update to 20.10 (from 20.04) the laptop freezes regularly. Screen is frozen, mouse cursor frozen and the only chance to recover is to switch off. Since it is hard to tell which part is broken I appended the kernel logs of the last boot. I found two "------------[ cut here ]------------" in the logs which seems to be a bad sign.
I tried different kernels 5.8.0-36, 5.8.0-38, 5.8.0-40 and a 5.10.8 from the kernel team. All freeze.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu50.3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: haug 2161 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 20.10
InstallationDate: Installed on 2019-09-26 (483 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
MachineType: LENOVO 20LS001AGE
Package: linux (not installed)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.8.0-40-generic root=UUID=39812da1-4b85-4eac-bf54-de26c89ea52f ro rootflags=subvol=@ psmouse.elantech_smbus=0 quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.8.0-40.45-generic 5.8.18
RelatedPackageVersions:
linux-restricted-modules-5.8.0-40-generic N/A
linux-backports-modules-5.8.0-40-generic N/A
linux-firmware 1.190.3
Tags: groovy wayland-session
Uname: Linux 5.8.0-40-generic x86_64
UpgradeStatus: Upgraded to groovy on 2021-01-09 (12 days ago)
UserGroups: sudo
WifiSyslog:
_MarkForUpload: True
dmi.bios.date: 08/05/2020
dmi.bios.release: 1.40
dmi.bios.vendor: LENOVO
dmi.bios.version: R0QET63W (1.40 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20LS001AGE
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.40
dmi.modalias: dmi:bvnLENOVO:bvrR0QET63W(1.40):bd08/05/2020:br1.40:efr1.40:svnLENOVO:pn20LS001AGE:pvrThinkPadL480:rvnLENOVO:rn20LS001AGE:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad L480
dmi.product.name: 20LS001AGE
dmi.product.sku: LENOVO_MT_20LS_BU_Think_FM_ThinkPad L480
dmi.product.version: ThinkPad L480
dmi.sys.vendor: LENOVO
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1912646
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.