Public bug reported: [ Impact ]
We found that on Strix Halo platforms, the DELL UP3218K 8K monitor failed to light up. Turned out it needs a quirk to reduce the use spread spectrum clock for this monitor to work. This behavior is confirmed in other OS as well, and they also implement the similar quirk. [ Fix ] The newer DMCUB firmware implements a workaround that can be enabled by amdgpu driver. To make this happen, we'll need: 1. DMCUB firmware at at least 0x09004500[1], which is already in v7.2-rc1. 2. Kernel commit enabling the quirk[2] [ Test Plan ] Boot with new kernel and firmware package. Test display output on the same monitor. The monitor should work. [ Were problems could occur ] This quirk specifically matches that monitor. In theory it won't impact monitors other than that one. [ Additional information ] [1] https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=79fdaa874 [2] https://github.com/torvalds/linux/commit/fe7945d092a1d3c340febc2ab176cee50d0f6c80 ** Affects: linux-firmware-amd-graphics (Ubuntu) Importance: Undecided Assignee: Leo Lin (0xff07) Status: New ** Affects: linux-oem-7.0 (Ubuntu) Importance: Undecided Assignee: Leo Lin (0xff07) Status: New ** Tags: originate-from-2158658 ** Changed in: linux-oem-7.0 (Ubuntu) Assignee: (unassigned) => Leo Lin (0xff07) ** Also affects: linux-firmware-amd-graphics (Ubuntu) Importance: Undecided Status: New ** Changed in: linux-firmware-amd-graphics (Ubuntu) Assignee: (unassigned) => Leo Lin (0xff07) ** Description changed: [ Impact ] We found that on Strix Halo platforms, the DELL UP3218K 8K monitor failed to light up. Turned out it needs a quirk to reduce the use spread spectrum clock for this monitor to work. This behavior is confirmed in other OS as well, and they also implement the similar quirk. - [ Fix ] The newer DMCUB firmware implements a workaround that can be enabled by amdgpu driver. To make this happen, we'll need: - 1. DMCUB firmware at at least 0x09004500[1] + 1. DMCUB firmware at at least 0x09004500[1], which is already in v7.2-rc1. 2. Kernel commit enabling the quirk[2] - [ Test Plan ] - Test display output on the same monitor. The monitor should work. - + Boot with new kernel and firmware package. Test display output on the + same monitor. The monitor should work. [ Were problems could occur ] This quirk specifically matches that monitor. In theory it won't impact monitors other than that one. - [ Additional information ] [1] https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=79fdaa874 [2] https://github.com/torvalds/linux/commit/fe7945d092a1d3c340febc2ab176cee50d0f6c80 ** Tags added: originate-from-2158658 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2158687 Title: [SRU] Fix black screen on DELL UP3218K 8K monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware-amd-graphics/+bug/2158687/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
