Controlled one-variable boot test with pci=nocrs removed. Linux confirmed that it used ACPI _CRS host-bridge windows and exposed large MMIO ranges, but the untouched Wavlink still experienced an initial AER/link-down failure. During automatic re-enumeration, JHL7440 xHCI appeared first and AQC113 appeared approximately 158 ms later; bridge 67:01.0 was already disabled, its required 5 MiB window could not be assigned, every AQC113 BAR failed, and Atlantic returned error -5. This demonstrates that pci=nocrs is not a sufficient cause of the late resource-allocation failure.
** Attachment added: "2026-09-15-with-crs-no-pci-nocrs-test.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2167202/+attachment/6000464/+files/2026-09-15-with-crs-no-pci-nocrs-test.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2167202 Title: thunderbolt/pci JHL7440/AQC113 fails to recover after tunnel disconnect; BAR allocation fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2167202/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
