** Description changed:

  [Impact]
+ Plug-in thunderbolt external monitor, and then plug-in thunderbolt external 
Hard drive on the external monitor, it sometimes can't detect the TBT storage.
  
  [Fix]
+ Retry tb_drom_read_n() when failed fixes this issue.
  
  [Test]
+ Verified on Dell platform with ASUS PA27AC Thunderbolt 3, and HP P800 TBT 
storage.
  
  [Regression Potential]
+ Low, it only add 100ms delay and retry once.

** Also affects: linux-oem-osp1 (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: linux-oem-osp1 (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: linux-oem-5.6 (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** No longer affects: linux (Ubuntu Bionic)

** No longer affects: linux-oem-5.6 (Ubuntu Bionic)

** No longer affects: linux-oem-osp1 (Ubuntu Focal)

** Changed in: linux-oem-osp1 (Ubuntu)
       Status: New => Invalid

** Changed in: linux-oem-osp1 (Ubuntu Bionic)
       Status: New => In Progress

** Changed in: linux-oem-osp1 (Ubuntu Bionic)
     Assignee: (unassigned) => AceLan Kao (acelankao)

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https://bugs.launchpad.net/bugs/1895606

Title:
  Thunderbolt3 daisy chain sometimes doesn't work

Status in linux package in Ubuntu:
  In Progress
Status in linux-oem-5.6 package in Ubuntu:
  Invalid
Status in linux-oem-osp1 package in Ubuntu:
  Invalid
Status in linux-oem-osp1 source package in Bionic:
  In Progress
Status in linux source package in Focal:
  In Progress
Status in linux-oem-5.6 source package in Focal:
  In Progress
Status in linux source package in Groovy:
  In Progress

Bug description:
  [Impact]
  Plug-in thunderbolt external monitor, and then plug-in thunderbolt external 
Hard drive on the external monitor, it sometimes can't detect the TBT storage.

  [Fix]
  Retry tb_drom_read_n() when failed fixes this issue.

  [Test]
  Verified on Dell platform with ASUS PA27AC Thunderbolt 3, and HP P800 TBT 
storage.

  [Regression Potential]
  Low, it only add 100ms delay and retry once.

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https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1895606/+subscriptions

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