Public bug reported: [Impact] When TBT monitor is connected to AMD platform, system resume will hit stack corruption or BUG_ON() macro.
[Fix] Revert the offending commit and handle MST properly. [Test] The system can resume normally and no more kernel splat. [Where problems could occur] The new logic is restriced to MST hub, so normal DP/HDMI usage should be unaffected. ** Affects: linux (Ubuntu) Importance: Medium Status: Confirmed ** Affects: linux-oem-5.17 (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux (Ubuntu Jammy) Importance: Medium Status: Confirmed ** Affects: linux-oem-5.17 (Ubuntu Jammy) Importance: Medium Status: Confirmed ** Affects: linux (Ubuntu Kinetic) Importance: Medium Status: Confirmed ** Affects: linux-oem-5.17 (Ubuntu Kinetic) Importance: Undecided Status: Invalid ** Also affects: linux (Ubuntu Kinetic) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Jammy) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Kinetic) Status: New => Confirmed ** Changed in: linux (Ubuntu Jammy) Status: New => Confirmed ** Changed in: linux (Ubuntu Jammy) Importance: Undecided => Medium ** Changed in: linux (Ubuntu Kinetic) Importance: Undecided => Medium ** Also affects: linux-oem-5.17 (Ubuntu) Importance: Undecided Status: New ** Changed in: linux-oem-5.17 (Ubuntu Kinetic) Status: New => Invalid ** Changed in: linux-oem-5.17 (Ubuntu Jammy) Status: New => Confirmed ** Changed in: linux-oem-5.17 (Ubuntu Jammy) Importance: Undecided => Medium -- 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/1990920 Title: Fix resume on AMD platforms when TBT monitor is plugged Status in linux package in Ubuntu: Confirmed Status in linux-oem-5.17 package in Ubuntu: Invalid Status in linux source package in Jammy: Confirmed Status in linux-oem-5.17 source package in Jammy: Confirmed Status in linux source package in Kinetic: Confirmed Status in linux-oem-5.17 source package in Kinetic: Invalid Bug description: [Impact] When TBT monitor is connected to AMD platform, system resume will hit stack corruption or BUG_ON() macro. [Fix] Revert the offending commit and handle MST properly. [Test] The system can resume normally and no more kernel splat. [Where problems could occur] The new logic is restriced to MST hub, so normal DP/HDMI usage should be unaffected. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1990920/+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