Public bug reported: [Impact] The system hangs on blackscreen with thunderbolt monitor while resume from suspend state.
[Fix] The TBT monitor HPD will be triggered during the resume procedure and call the drm_client_modeset_probe() while struct drm_connector connector->dev->master is NULL. It will mess up the pipe topology after resume. AMD submitted a patch to fix this issue. https://lore.kernel.org/all/20240927170103.102180-3-jerry....@amd.com/T/#e868f6b967ec79ae85c5a8a446be9b5d5c97e5427 [Test case] 1. Boot to OS 2. Plug thunderbolt monitor to the system. 3. Enter suspend 4. Press the power button to resume from suspend 5. Should not hang [Where problems could occur] Pretty low chance to introduce any regressions. The patch won't do anything bad to the system while resuming, the probing will be done after resumed. ** Affects: hwe-next Importance: Undecided Status: New ** Affects: linux (Ubuntu) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.11 (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux (Ubuntu Noble) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.11 (Ubuntu Noble) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux (Ubuntu Oracular) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.11 (Ubuntu Oracular) Importance: Undecided Status: Invalid ** Tags: oem-priority originate-from-2064209 stella ** Also affects: linux (Ubuntu Noble) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Oracular) Importance: Undecided Status: New ** Also affects: linux-oem-6.11 (Ubuntu) Importance: Undecided Status: New ** Changed in: linux-oem-6.11 (Ubuntu Oracular) Status: New => Invalid ** Changed in: linux (Ubuntu Noble) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux (Ubuntu Oracular) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux-oem-6.11 (Ubuntu Noble) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux (Ubuntu Noble) Status: New => In Progress ** Changed in: linux (Ubuntu Oracular) Status: New => In Progress ** Changed in: linux-oem-6.11 (Ubuntu Noble) Status: New => In Progress ** Tags added: oem-priority originate-from-2064209 stella -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2083182 Title: The system hangs after resume with thunderbolt monitor(AMD GPU [1002:1900]) To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2083182/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
