Is this issue reproducible on the latest mainline kernel, or is it specific to 6.5 HWE & OEM kernels? For example, how is the latest kernel (either 6.11-rc or 6.10.x) from https://kernel.ubuntu.com/mainline/?C=N;O=D behaving?
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2070020 Title: Lenovo dock no longer working after upgrade from 6.5.0-35 to 6.5.0-41 Status in linux package in Ubuntu: Confirmed Status in linux source package in Mantic: Won't Fix Bug description: 1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> About Ubuntu Ubuntu 22.04.4 LTS 2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center 6.5.0-41.41~22.04.2 3) What you expected to happen I have a Lenovo laptop (P15v Gen 3). I have a Lenovo dock attached to that. I have a monitor attached to that via HDMI. I have another monitor attached directly to the laptop's own HDMI port. When I boot my machine with the Lenovo dock attached, it usually works. 4) What happened instead Yesterday, that display didn't work. It just stayed blank and the journal showed the following lines: --- Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(4190400) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(4190400) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(2095200) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(5028480) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(2514240) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(1257120) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(4190400) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(4190400) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(2095200) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(5028480) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(2514240) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(1257120) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(4190400) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(4190400) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(2095200) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(5028480) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(2514240) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(1257120) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) training attempt 4 of 4 failed @ rate(20) x lane(4) @ spread = 10 : fail reason:(6) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) training attempt 4 of 4 failed @ rate(20) x lane(2) @ spread = 10 : fail reason:(6) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(4190400) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) training attempt 4 of 4 failed @ rate(20) x lane(1) @ spread = 10 : fail reason:(6) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) training attempt 4 of 4 failed @ rate(10) x lane(4) @ spread = 10 : fail reason:(6) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(4190400) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) training attempt 4 of 4 failed @ rate(10) x lane(2) @ spread = 10 : fail reason:(6) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(2095200) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) training attempt 4 of 4 failed @ rate(10) x lane(1) @ spread = 10 : fail reason:(6) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(5028480) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) training attempt 4 of 4 failed @ rate(6) x lane(4) @ spread = 10 : fail reason:(6) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(2514240) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) training attempt 4 of 4 failed @ rate(6) x lane(2) @ spread = 10 : fail reason:(6) Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) bandwidth too low after fallback req_bw(5796000) > link_bw(1257120) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] perform_link_training_with_retries: Link(3) training attempt 4 of 4 failed @ rate(6) x lane(1) @ spread = 10 : fail reason:(6) Jun 21 08:52:13 mymachine kernel: [drm] DMUB HPD IRQ callback: link_index=3 Jun 21 08:52:13 mymachine kernel: [drm] enabling link 3 failed: 15 --- Some of these messages reoccur if I unplug and replug the HDMI display or disable and enable it via the display settings. Every time I enable the display, the other display (connected to the laptop's own HDMI port) freezes for about 10 seconds. I switched to another dock in order to rule out hardware failure and I get the same issue. This worked on 6.5.0-35.35~22.04.1. It broke when 6.5.0-41.41~22.04.2 was installed. It worked again when I booted back into 6.5.0-35.35~22.04.1. ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: linux-image-unsigned-6.5.0-41-generic (not installed) ProcVersionSignature: Ubuntu 6.5.0-35.35~22.04.1-generic 6.5.13 Uname: Linux 6.5.0-35-generic x86_64 NonfreeKernelModules: zfs ApportVersion: 2.20.11-0ubuntu82.5 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: KDE Date: Fri Jun 21 10:17:11 2024 InstallationDate: Installed on 2023-07-05 (351 days ago) InstallationMedia: Kubuntu 22.04.2 LTS "Jammy Jellyfish" - Release amd64 (20230223) SourcePackage: linux-hwe-6.5 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2070020/+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
