Ubuntu
linux-signed-oem-5.14 package

[i915] Intermittent freezing and LSPCON init failed kernel messages

Bug #1973098 reported by Kamikaze
44
This bug affects 6 people
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Confirmed
Undecided
Unassigned
linux-signed-oem-5.14 (Ubuntu)
Confirmed
Undecided
Unassigned

Bug Description

Hardware: Lenovo ThinkPad model 20ST0055AU

Boot messages show:
[ 6.397804] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[ 6.397901] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor 0

During normal operation there will intermittently be a freeze for a second or two and then more of these messages display in the kernel logs:

[ 505.487006] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[ 505.487072] [drm:lspcon_resume [i915]] *ERROR* LSPCON init failed on port D
[ 506.747930] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[ 506.748018] [drm:lspcon_resume [i915]] *ERROR* LSPCON init failed on port D

The system will then become operational again.

The system is still usable, but it is annoying.

I've switched onto this OEM kernel from the generic kernel (5.13), as I had other problems with 5.13 regarding external displays not coming back after idle timeouts.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.14.0-1036-oem 5.14.0-1036.40
ProcVersionSignature: Ubuntu 5.14.0-1036.40-oem 5.14.21
Uname: Linux 5.14.0-1036-oem x86_64
ApportVersion: 2.20.11-0ubuntu27.23
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Thu May 12 10:29:31 2022
InstallationDate: Installed on 2021-05-05 (371 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
SourcePackage: linux-signed-oem-5.14
UpgradeStatus: No upgrade log present (probably fresh install)

See original description
Revision history for this message
Kamikaze (mick-saunders) wrote :
description: updated
Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in linux-signed-oem-5.14 (Ubuntu):
status: New → Confirmed
Revision history for this message
Paweł Pańczyk (vicat) wrote :

Having the same problem on Ubuntu 22.04 with 5.15 kernel running on Dell Precision 7730.

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Now also reported in kernel 5.15.0-50.56-generic (bug 1992563)

tags: added: jammy regression-update
Changed in linux (Ubuntu):
status: New → Confirmed
Revision history for this message
Brandon W. King (brandon-w-king) wrote :

I too am having this problem:

5.15.0-52-generic #58~20.04.1-Ubuntu

System-manufacturer : LENOVO
System-product-name : 20SUS5W300
System-version : ThinkPad P15 Gen 1
Bios-release-date : 07/04/2022
Bios-version : N30ET47W (1.30 )

Revision history for this message
Albert Schotschneider (schotschneider) wrote :

I am having the same problem here.

5.15.0-52-generic #58~20.04.1-Ubuntu

I do have the same system as @Brandon W. King, also same BIOS version.

Daniel van Vugt (vanvugt)
summary: - Intermittent freezing and LSPCON init failed kernel messages
+ [i915] Intermittent freezing and LSPCON init failed kernel messages
tags: added: i915
Revision history for this message
Alessandro Zini (aleeraser) wrote (last edit ):

I am having the same issue (since months) and have a very similar setup as @brandon-w-king

5.15.0-60-generic #66~20.04.1-Ubuntu

System-manufacturer : LENOVO
System-product-name : 20SUS27T00
System-version : ThinkPad P15 Gen 1
Bios-release-date : 12/14/2022
Bios-version : N30ET49W (1.32 )

Revision history for this message
Christoffer (roev) wrote :

Same issue here on

System-manufacturer : LENOVO
System-product-name : 20SUS51107
System-version : ThinkPad P15 Gen 1
Bios-release-date : 12/14/2022
Bios-version : N30ET49W (1.32)

with
5.15.0-67-generic #74-22.04.1-Ubuntu
and
5.19.0-35-generic #36~22.04.1-Ubuntu

Revision history for this message
Dan (dan-voyant) wrote :

Same issue here (very similar to above)

System-manufacturer : LENOVO
System-product-name : 20SUS51107
System-version : ThinkPad T15g Gen 1
Bios-release-date : 12/14/2022
Bios-version : N30ET49W (1.32)

5.19.0-38-generic #39~22.04.1-Ubuntu

Revision history for this message
Marcus Uneson (marcus-uneson) wrote :

Same issue here, very similar to the above:

System-manufacturer : LENOVO
System-product-name : 20STCTO1WW
System-version : ThinkPad P15 Gen 1
Bios-release-date : 10/07/2022
Bios-version : N30ET48W (1.31 )

5.19.0-41-generic

Revision history for this message
Günter Bertels (gbertels) wrote :

I have the same issues with Kernel 5.19.0-46-generic

System-manufacturer : LENOVO
System-version : ThinkPad P15 Gen 1
Operating System: Ubuntu 22.04.2 LTS

Revision history for this message
john (jobir123) wrote :

Same problem on 6.2.0-26-generic under 23.04.

System-manufacturer : LENOVO
System-product-name : 20URS05D00
System-version : ThinkPad T15g Gen 1
Bios-version : N30ET49W (1.32 )

Switching BIOS to discrete only mode fixes the issue for me but not ideal.

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