HELP: HDMI não funciona - Radeon Vega Mobile Series - HP Elibook 745 G5

[pabloandrei]

Olá pessoal.

Alguém teria alguma "luz", utilizo Ubuntu 18 com lightdm, a porta HDMI não esta funcional.
Utilizei os drives oficiais da Radeon ( https://www.amd.com/en/support/kb/release-notes/rn-prorad-lin-18-40 )

Abaixo segue algumas informações adicionais:

$ uname -r
5.3.0-42-generic

$ lspci -v -s 03:00.0
03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Raven Ridge [Radeon Vega Series / Radeon Vega Mobile Series] (rev d1) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Vega [Radeon Vega 8 Mobile]
   Flags: bus master, fast devsel, latency 0, IRQ 255
   Memory at d0000000 (64-bit, prefetchable) [size=256M]
   Memory at e0000000 (64-bit, prefetchable) [size=2M]
   I/O ports at 2000 [size=256]
   Memory at e0700000 (32-bit, non-prefetchable) [size=512K]
   Capabilities: <access denied>
   Kernel modules: amdgpu

$ lspci -v -s 03:00.7
03:00.7 Non-VGA unclassified device: Advanced Micro Devices, Inc. [AMD] Device 15e6
   Subsystem: Advanced Micro Devices, Inc. [AMD] Device 15e4
   Flags: fast devsel, IRQ 31
   Memory at e0500000 (32-bit, non-prefetchable) [size=1M]
   Memory at e078c000 (32-bit, non-prefetchable) [size=8K]
   Capabilities: <access denied>
   Kernel driver in use: i2c_amd_mp2
   Kernel modules: i2c_amd_mp2_pci