Public bug reported: [Impact] Plug triple QHD@60HZ monitors on dock and connect dock to machine, the external monitors can't be detected or can't display normally.
[Fix] Intel provides a patch to fix this issue https://gitlab.freedesktop.org/drm/i915/kernel/-/commit/9cb15478916e849d62a6ec44b10c593b9663328c [Test] 1. Install Ubuntu on LNL or ARL platforms 2. Connect 3 monitors on WD19DCS or WD22TB4 or WD25TB4 dock 3. Connect the dock to the machine 4. All 3 external monitors should display correctly [Where problems could occur] This is a workaround for certain intel GPU(Display version 14 ~ 20) to fix a firmware issue. It should not affect other unrelated platforms and most likely won't introduce any regression. ** Affects: hwe-next Importance: Undecided Status: New ** Affects: linux-oem-6.11 (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux-oem-6.14 (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux-oem-6.11 (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-6.11 (Ubuntu Questing) Importance: Undecided Status: Invalid ** Affects: linux-oem-6.14 (Ubuntu Questing) Importance: Undecided Status: Invalid ** Tags: cpl jira-cpl-145 oem-priority ** Also affects: linux-oem-6.14 (Ubuntu) Importance: Undecided Status: New ** Also affects: linux-oem-6.11 (Ubuntu Questing) Importance: Undecided Status: New ** Also affects: linux-oem-6.14 (Ubuntu Questing) Importance: Undecided Status: New ** Also affects: linux-oem-6.11 (Ubuntu Noble) Importance: Undecided Status: New ** Also affects: linux-oem-6.14 (Ubuntu Noble) Importance: Undecided Status: New ** Changed in: linux-oem-6.11 (Ubuntu Questing) Status: New => Invalid ** Changed in: linux-oem-6.14 (Ubuntu Questing) Status: New => Invalid ** Changed in: linux-oem-6.14 (Ubuntu Noble) Status: New => In Progress ** Changed in: linux-oem-6.11 (Ubuntu Noble) Status: New => In Progress ** Changed in: linux-oem-6.11 (Ubuntu Noble) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux-oem-6.14 (Ubuntu Noble) Assignee: (unassigned) => AceLan Kao (acelankao) ** Tags added: cpl jira-cpl-145 oem-priority -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2111960 Title: External monitor on the dock can’t be detected and light on To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2111960/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
