** Description changed: [ Impact ] During testing, we found problems with both the 2022 and 2026 Apple Studio displays on AMD platforms. We have a quirk that we are upstreaming that (ideally) should be brought into the OEM kernel. [ Fix ] Backport the following quirk: - drm/amd/display: hide Apple Studio Display secondary tile[1] + - drm/amd/display: Prune per-tile Timing from Apple Studio Display Primary Tile[2] [ Test ] 1. Boot into the kernel with the quirk. 2. Connect the Apple Studio monitor. It should function normally. [ Where the problems could occur ] This quirk matches those displays specifically, so it shouldn't take effects on other displays. That said, this quirk's dependencies make it very unlikely to bring it to 7.0-based kernel. See below. [ Additional information ] Backporting this cleanly depends on a massive file rearrangement - patchset[2], which depends on various other patchsets (e.g. the HDMI FRL - patchset[3]), making the backport unlikely to happen on 7.0-based + patchset[3], which depends on various other patchsets (e.g. the HDMI FRL + patchset[4]), making the backport unlikely to happen on 7.0-based kernels. That said, still open a public bug in case other users bump into this, and we can point them to this. The file arrangement patches will likely land in 7.3, and that'll be a more suitable timing to revisit this. [1] https://lore.kernel.org/amd-gfx/[email protected]/ - [2] https://lore.kernel.org/amd-gfx/[email protected]/ - [3] https://lore.kernel.org/amd-gfx/[email protected]/ + [2] https://lore.kernel.org/amd-gfx/[email protected]/ + [3] https://lore.kernel.org/amd-gfx/[email protected]/ + [4] https://lore.kernel.org/amd-gfx/[email protected]/
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2161298 Title: Quirk in amdgpu driver for the Apple studio displays To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2161298/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
