我的联想 Yoga slim 7 配备 AMD ryzen 5 4500u 和 RX vega 6 集成显卡，未检测到任何显示输出。我尝试了 HDMI 和 USB-C。Xrandr 输出：
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080
default connected primary 1920x1080+0+0 0mm x 0mm
1920x1080 77.00*
和：
*-display UNCLAIMED
description: VGA compatible controller
product: Renoir
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:03:00.0
version: c3
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi msix 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:80500000-8057ffff
我正在运行 Ubuntu 20.04 内核版本5.4.0-45-generic，如能得到任何帮助我将非常感谢！