https://bugzilla.kernel.org/show_bug.cgi?id=220906
--- Comment #7 from Andrei ([email protected]) --- I initially thought this was just an AMD driver bug, but after digging through the logs across a few more versions, I think I’ve found a better lead. In 6.17.6, where the regression started for the first time, I'm seeing these bridge resource failures pop up for the first time: pci 0000:02:00.0: bridge window [io size 0x1000]: can't assign; no space pci 0000:02:00.0: bridge window [io size 0x1000]: failed to assign Bridge 02:00.0 is the gateway for the USB4/Thunderbolt 4 controller on this machine. In version 6.17.5, the kernel assigns it just fine and my 4K output works perfectly. Starting with 6.17.6, that assignment fails, which lines up exactly with when the display stops working. Interestingly, the ath12k driver also starts throwing an "invalid ACPI DSM TAS config size" error in this same version. It feels like 6.17.6 changed something fundamental about how ACPI or PCI resource arbitration is handled, and now it's just choking out the I/O space that the Thunderbolt subsystem needs to function. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
