https://bugzilla.kernel.org/show_bug.cgi?id=201527

--- Comment #10 from Robert Strube (rstr...@gmail.com) ---
Created attachment 279745
  --> https://bugzilla.kernel.org/attachment.cgi?id=279745&action=edit
dmesg log eGPU AMD RX 580 attached ACPI enabled

The attempted initialization of the RX 580 (as an eGPU over TB) happens at
timestamp [   11.118853]

The initialization fails with these messages:

[   16.124778] [drm:atom_op_jump [amdgpu]] *ERROR* atombios stuck in loop for
more than 5secs aborting
[   16.124805] [drm:amdgpu_atom_execute_table_locked [amdgpu]] *ERROR* atombios
stuck executing E650 (len 187, WS 0, PS 4) @ 0xE6FA
[   16.124828] [drm:amdgpu_atom_execute_table_locked [amdgpu]] *ERROR* atombios
stuck executing C53A (len 193, WS 4, PS 4) @ 0xC569
[   16.124851] [drm:amdgpu_atom_execute_table_locked [amdgpu]] *ERROR* atombios
stuck executing C410 (len 114, WS 0, PS 8) @ 0xC47C
[   16.124853] amdgpu 0000:09:00.0: gpu post error!
[   16.124854] amdgpu 0000:09:00.0: Fatal error during GPU init

The AMD developers believe the issue might be caused by PCI BAR resource issues
- specifically some of the PCI to TB bridges not getting the necessary
resources.

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