** 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], which is already in v7.2-rc1. - 2. Kernel commit enabling the quirk[2] + 1. DMCUB firmware at at least 0x09004500[1] + 2. Kernel commit enabling the quirk[2], which is already in v7.2-rc1. [ 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
-- 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
