Public bug reported: [Impact] Plugged the Lenovo USB-C to VGA adapter or Dell DA310 hub to thunderbolt 5 port, the communication through AUX timed out, and there is no video output to the VGA monitor
i915 0000:00:02.0: [drm:drm_dp_dpcd_read [drm_display_helper]] AUX USBC4/DDI TC4/PHY TC4: 0x00000 AUX -> (ret=-110) [Fix] https://lkml.org/lkml/2025/11/27/193 [Test] 1. Find a device with TB5 port 2. Plug a VGA monitor to Lenovo USB-C to VGA adapter[17ef:7217] or Dell DA310[413c:c010] 3. Plug the adapter/hub to the TB5 port 4. The external monitor should work as expected. [Where problems could occur] It handles the fail case and doesn't affect the code path if it already works. No regression. ** Affects: hwe-next Importance: Undecided Status: New ** Affects: linux (Ubuntu) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.14 (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux-oem-6.17 (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux (Ubuntu Noble) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.14 (Ubuntu Noble) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.17 (Ubuntu Noble) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux (Ubuntu Plucky) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.14 (Ubuntu Plucky) Importance: Undecided Status: Invalid ** Affects: linux-oem-6.17 (Ubuntu Plucky) Importance: Undecided Status: Invalid ** Affects: linux (Ubuntu Questing) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.14 (Ubuntu Questing) Importance: Undecided Status: Invalid ** Affects: linux-oem-6.17 (Ubuntu Questing) Importance: Undecided Status: Invalid ** Affects: linux (Ubuntu Resolute) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.14 (Ubuntu Resolute) Importance: Undecided Status: Invalid ** Affects: linux-oem-6.17 (Ubuntu Resolute) Importance: Undecided Status: Invalid ** Tags: jira-somerville-3369 oem-priority somerville ** Also affects: linux (Ubuntu Questing) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Resolute) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Noble) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Plucky) Importance: Undecided Status: New ** Also affects: linux-oem-6.14 (Ubuntu) Importance: Undecided Status: New ** Also affects: linux-oem-6.17 (Ubuntu) Importance: Undecided Status: New ** Tags added: jira-somerville-3369 oem-priority somerville ** Changed in: linux (Ubuntu Noble) Status: New => In Progress ** Changed in: linux (Ubuntu Noble) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux (Ubuntu Plucky) Status: New => In Progress ** Changed in: linux (Ubuntu Plucky) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux (Ubuntu Questing) Status: New => In Progress ** Changed in: linux (Ubuntu Questing) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux (Ubuntu Resolute) Status: New => In Progress ** Changed in: linux (Ubuntu Resolute) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux-oem-6.14 (Ubuntu Noble) Status: New => In Progress ** Changed in: linux-oem-6.14 (Ubuntu Noble) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux-oem-6.14 (Ubuntu Plucky) Status: New => Invalid ** Changed in: linux-oem-6.14 (Ubuntu Questing) Status: New => Invalid ** Changed in: linux-oem-6.14 (Ubuntu Resolute) Status: New => Invalid ** Changed in: linux-oem-6.17 (Ubuntu Noble) Status: New => In Progress ** Changed in: linux-oem-6.17 (Ubuntu Noble) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux-oem-6.17 (Ubuntu Plucky) Status: New => Invalid ** Changed in: linux-oem-6.17 (Ubuntu Questing) Status: New => Invalid ** Changed in: linux-oem-6.17 (Ubuntu Resolute) Status: New => Invalid ** Description changed: [Impact] Plugged the Lenovo USB-C to VGA adapter or Dell DA310 hub to thunderbolt 5 port, the communication through AUX timed out, and there is no video output to the VGA monitor i915 0000:00:02.0: [drm:drm_dp_dpcd_read [drm_display_helper]] AUX USBC4/DDI TC4/PHY TC4: 0x00000 AUX -> (ret=-110) [Fix] https://lkml.org/lkml/2025/11/27/193 [Test] 1. Find a device with TB5 port - 2. Plug a VGA monitor to Lenovo USB-C to VGA adapter or Dell DA310 + 2. Plug a VGA monitor to Lenovo USB-C to VGA adapter[17ef:7217] or Dell DA310[413c:c010] 3. Plug the adapter/hub to the TB5 port 4. The external monitor should work as expected. [Where problems could occur] It handles the fail case and doesn't affect the code path if it already works. No regression. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2133143 Title: Could not output video from type-c to VGA adapter To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2133143/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
