Public bug reported: [Impact] When a Thunderbolt monitor gets plugged to an AMD laptop for second time, the Thunderbolt monitor remains blank.
[Fix] Reinitialize TMU and perform proper Time Synchronization Handshake every time. [Test] The Thunderbolt monitor still has image after many replugging. [Where problems could occur] This change the flow on disabling TMU, which is responsible for time synchronization, so behavior of Thunderbolt docking might be affected. Per my limited test no issue has been observed. ** Affects: linux (Ubuntu) Importance: Undecided Status: Fix Released ** Affects: linux-oem-6.1 (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux (Ubuntu Jammy) Importance: Undecided Status: Won't Fix ** Affects: linux-oem-6.1 (Ubuntu Jammy) Importance: Low Status: Confirmed ** Affects: linux (Ubuntu Lunar) Importance: Low Status: Confirmed ** Affects: linux-oem-6.1 (Ubuntu Lunar) Importance: Undecided Status: Invalid ** Also affects: linux (Ubuntu Lunar) Importance: Undecided Status: New ** Also affects: linux-oem-6.1 (Ubuntu) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Jammy) Importance: Undecided Status: New ** Also affects: linux-oem-6.1 (Ubuntu Jammy) Importance: Undecided Status: New ** Changed in: linux (Ubuntu) Status: New => Fix Released ** Changed in: linux (Ubuntu Lunar) Status: New => Confirmed ** Changed in: linux (Ubuntu Jammy) Status: New => Won't Fix ** Changed in: linux (Ubuntu Lunar) Importance: Undecided => Low ** Changed in: linux-oem-6.1 (Ubuntu) Status: New => Invalid ** Changed in: linux-oem-6.1 (Ubuntu Lunar) Status: New => Invalid ** Changed in: linux-oem-6.1 (Ubuntu Jammy) Status: New => Confirmed ** Changed in: linux-oem-6.1 (Ubuntu Jammy) Importance: Undecided => Low -- 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/2034491 Title: Fix blank display when Thunderbolt monitor is plugged second time Status in linux package in Ubuntu: Fix Released Status in linux-oem-6.1 package in Ubuntu: Invalid Status in linux source package in Jammy: Won't Fix Status in linux-oem-6.1 source package in Jammy: Confirmed Status in linux source package in Lunar: Confirmed Status in linux-oem-6.1 source package in Lunar: Invalid Bug description: [Impact] When a Thunderbolt monitor gets plugged to an AMD laptop for second time, the Thunderbolt monitor remains blank. [Fix] Reinitialize TMU and perform proper Time Synchronization Handshake every time. [Test] The Thunderbolt monitor still has image after many replugging. [Where problems could occur] This change the flow on disabling TMU, which is responsible for time synchronization, so behavior of Thunderbolt docking might be affected. Per my limited test no issue has been observed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2034491/+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