See same issue using Ubuntu 23.10 on a HP HP ProDesk 400 G3 DM/82A5 and it uses Intel HD Graphics 630. Occasionally I will get a black screen with no ability to activate which then requires a reboot. Sometimes I will need to power off and unplug hdmi cable.
i915 0000:00:02.0: [drm] *ERROR* LSPCON mode hasn't settled 2024-02-27T13:33:30.125032-06:00 HPProDesk400 kernel: [ 3323.472414] i915 0000:00:02.0: [drm] *ERROR* LSPCON mode change timed out 2024-02-27T13:33:30.125049-06:00 HPProDesk400 kernel: [ 3323.472417] i915 0000:00:02.0: [drm] *ERROR* LSPCON mode change failed 2024-02-27T13:33:30.125049-06:00 HPProDesk400 kernel: [ 3323.472418] i915 0000:00:02.0: [drm] *ERROR* LSPCON resume failed 2024-02-27T13:33:30.133026-06:00 HPProDesk400 kernel: [ 3323.481193] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful 2024-02-27T13:33:30.149026-06:00 HPProDesk400 kernel: [ 3323.498313] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-oem-5.14 in Ubuntu. https://bugs.launchpad.net/bugs/1973098 Title: [i915] Intermittent freezing and LSPCON init failed kernel messages Status in linux package in Ubuntu: Confirmed Status in linux-signed-oem-5.14 package in Ubuntu: Confirmed 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1973098/+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
