我刚刚给自己买了一台三星 S27A600UUU。我希望通过 USB-C 将其连接到我的 Lenovo E585，并将其用作笔记本电脑电源线和显示屏线。
电源部分按预期工作，但显示部分不工作。当我将显示器连接到笔记本电脑时，操作系统可以正确识别所连接的显示器，包括正确的分辨率和刷新率。然而，虽然我可以在显示应用程序中配置它，但实际上没有显示任何图像。显示屏声称笔记本电脑没有发送任何信号，相应地只显示黑色。
通过 HDMI 连接笔记本电脑效果很好，但我希望减少该电缆的数量。有人知道这可能是什么原因吗？
输出xrandr -q
Screen 0: minimum 320 x 200, current 2560 x 1440, maximum 16384 x 16384
eDP connected (normal left inverted right x axis y axis)
1920x1080 59.98 + 47.98
1680x1050 59.98
1280x1024 59.98
1440x900 59.98
1280x800 59.98
1280x720 59.98
1024x768 59.98
800x600 59.98
640x480 59.98
HDMI-A-0 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 597mm x 337mm
2560x1440 59.95*
1920x1080 60.00 50.00 59.94
1680x1050 59.88
1600x900 60.00
1280x1024 75.02 60.02
1440x900 59.90
1280x800 59.91
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-1 connected (normal left inverted right x axis y axis)
2560x1440 75.00 + 59.95
1920x1200 75.00
1920x1080 60.00 50.00 59.94
1600x1200 75.00
1680x1050 59.95
1600x900 60.00
1280x1024 75.02 60.02
1440x900 59.89
1280x800 59.81
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
DVI-I-4-4 disconnected (normal left inverted right x axis y axis)
DVI-I-3-3 disconnected (normal left inverted right x axis y axis)
DVI-I-2-2 disconnected (normal left inverted right x axis y axis)
DVI-I-1-1 disconnected (normal left inverted right x axis y axis)
lspci -vv与图形设备相关的输出：
05:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Raven Ridge [Radeon Vega Series / Radeon Vega Mobile Series] (rev c3) (prog-if 00 [VGA controller])
Subsystem: Lenovo Raven Ridge [Radeon Vega Series / Radeon Vega Mobile Series]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort+ <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 44
IOMMU group: 13
Region 0: Memory at b0000000 (64-bit, prefetchable) [size=256M]
Region 2: Memory at c0000000 (64-bit, prefetchable) [size=2M]
Region 4: I/O ports at 1000 [size=256]
Region 5: Memory at c0800000 (32-bit, non-prefetchable) [size=512K]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: amdgpu
Kernel modules: amdgpu
我也看到了这个关于askubuntu的问题，但这似乎与 nvidia 显卡有关。我确实尝试添加amdgpu.exp_hw_support=1到GRUB_CMDLINE_LINUX_DEFAULT，但这并没有改变任何东西。