Graphics driver for AMD Radeon RX Vega 8 (Ryzen 4000)

my laptop with Ubuntu 18.04 can't identify the GPU. it's an integrated GPU in AMD Ryzen 7 5800H

the laptop detailed information is below

lshw shows the following infomation

 *-display UNCLAIMED description: VGA compatible controller product: Advanced Micro Devices, Inc. [AMD/ATI] vendor: Advanced Micro Devices, Inc. [AMD/ATI] physical id: 0 bus info: pci@0000:03:00.0 version: c5 width: 64 bits clock: 33MHz capabilities: vga_controller bus_master cap_list configuration: latency=0 resources: iomemory:fc0-fbf iomemory:fc0-fbf memory:fce0000000-fcefffffff memory:fcf0000000-fcf01fffff ioport:1000(size=256) memory:d0400000-d047ffff

Can anyone help me out with proper driver information?

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