Ubuntu
linux-oem-5.14 package

  1. Focal (20.04)
  2. Bug #1962349
  3. Comment #0

Comment 0 for bug 1962349

Revision history for this message
Mario Limonciello (superm1) wrote :

[Impact]

 * AMD Yellow Carp provides integrated USB4 host controllers
 * When plugging in a Thunderbolt3 or USB4 device, users are unable to authorize it using the GUI due to an error message: "parent not authorized, deferring"

[Test Plan]

 * Plug in USB4 device or TBT3 to AMD Yellow Carp host
 * Ensure that PCI topology has populated
 * Observe that /sys/bus/thunderbolt/devices/DEVICE/authorized is "0"
 * Try to run `boltctl enroll $UUID`

[Where problems could occur]

 * Intel USB4 or TBT3 hosts also use bolt. They could have a problem with the new version of bolt.
 * This is very unlikely however since there is a through test suite, and up until now the entire industry has been using bolt on Intel controllers for a long time.

[Other Info]
 * This bug also occurs on Intel controllers from ICL, TGL or ALD, but in many cases they are automatically authorized to an iommu DMA policy.
 * It is fixed in bolt 0.9.1 or later release.
 * To solve the SRU, will backport 0.9.2 release from Jammy.