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  1. Core ReactOS
  2. CORE-16319

Bad PCI bridge: UNEXPECTED_KERNEL_MODE_TRAP bugcheck on real hardware Xbox

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    Description

      The boot process ends with UNEXPECTED_KERNEL_MODE_TRAP (bugcheck 0x7F) with both old and new USB stack drivers (I don't know if it's relevant, but cc extravert34 to look at it). Both debug logs attached.

      It turns out the PCI-to-PCI bridge is broken and reports all PCI bus 0 devices as its children. This leads to recursion in the device tree.

      Attachments

        1. 0.4.15-dev-2574-g18e95f5a4e-patched.log
          67 kB
          Stas'M
        2. 0.4.15-dev-2574-g18e95f5a4e-patched-devaction.log
          8.79 MB
          Stas'M
        3. 0.4.15-dev-2574-g18e95f5a4e-patched-pci-fdo-pcibus-debug.log
          2.74 MB
          Stas'M
        4. bugcheck_analysys_nousb.log
          25 kB
          Stas'M
        5. bugcheck_analysys_usb.log
          37 kB
          Stas'M
        6. xbox_new_usb.log
          66 kB
          Stas'M
        7. xbox_old_usb.log
          55 kB
          Stas'M

        Issue Links

          blocks

          Bug - A problem which impairs or prevents the functions of the product. CORE-16329 Boot from BRFR-partitioned disk with FATX filesystem on Xbox - INACCESSIBLE_BOOT_DEVICE bugcheck

          • Major - Major loss of function.
          • Resolved
          relates to

          Bug - A problem which impairs or prevents the functions of the product. CORE-17600 AGP bridge does not have Xbox GPU as children device on real hardware

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Activity

            People

              binarymaster Stas'M
              binarymaster Stas'M
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              Dates

                Created:
                Updated:
                Resolved: