我刚买了一台三星 LU28R550UQNXZA(28 英寸 4K UHD)显示器,连接到运行 Ubuntu 22.04.1 (X11) 的戴尔 XPS 13 9370。除了支持的最高刷新率为 30Hz 外,其他都正常。
我正在使用 USB-C 转 HDMI/USB-A 适配器,但我很确定它或电缆没有问题,因为将同样的东西连接到 MacBook Pro 可以提供 60Hz 的刷新率。
我尝试过但没有成功:
- 无论是否缩放(100%和200%)都是一样的
- 连接显示器后重新启动
- 尝试了所有 USB-C 端口和不同的适配器(MacBook Pro 也适用)
- 尝试手动添加 60Hz 使用
cvt
和xrandr
我的笔记本电脑规格:
- 中央处理器:英特尔® 酷睿™ i7-8550U
- 显卡:Mesa Intel® UHD Graphics 620 (KBL GT2)
xrandr --verbose
输出(截断):
...
DP-1 connected primary 3840x2160+0+0 (0x6c) normal (normal left inverted right x axis y axis) 632mm x 360mm
Identifier: 0x42
Timestamp: 16459755
Subpixel: unknown
Gamma: 1.0:1.0:1.0
Brightness: 1.0
Clones:
CRTC: 0
CRTCs: 1 0 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
EDID:
00ffffffffffff004c2d171055373930
2c200103803f24782ac8b5ad50449e25
0f5054bfef80714f810081c081809500
a9c0b300010108e80030f2705a80b058
8a0078682100001e000000fd00324b1e
873c000a202020202020000000fc004c
5532385235350a2020202020000000ff
0048434a544230323239390a202001aa
020335f04961120313041f10605f2309
070783010000e305c0006b030c001000
b83c2000200167d85dc401788003e20f
81e3060501023a801871382d40582c45
0078682100001e023a80d072382d4010
2c458078682100001e04740030f2705a
80b0588a0078682100001e565e00a0a0
a029503020350078682100001a000059
_MUTTER_PRESENTATION_OUTPUT: 0
HDCP Content Type: HDCP Type0
supported: HDCP Type0, HDCP Type1
Content Protection: Undesired
supported: Undesired, Desired, Enabled
Colorspace: Default
supported: Default, RGB_Wide_Gamut_Fixed_Point, RGB_Wide_Gamut_Floating_Point, opRGB, DCI-P3_RGB_D65, BT2020_RGB, BT601_YCC, BT709_YCC, XVYCC_601, XVYCC_709, SYCC_601, opYCC_601, BT2020_CYCC, BT2020_YCC
max bpc: 12
range: (6, 12)
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
subconnector: HDMI
supported: Unknown, VGA, DVI-D, HDMI, DP, Wireless, Native
link-status: Good
supported: Good, Bad
CTM: -649236511 0 560760480 0 60196823 0 172408752 0 -136459090 0 28668150 -2147483648 40140107 0 45368128 -2147483648
18007942 1
CONNECTOR_ID: 103
supported: 103
non-desktop: 0
range: (0, 1)
3840x2160 (0x6c) 297.000MHz +HSync +VSync *current
h: width 3840 start 4016 end 4104 total 4400 skew 0 clock 67.50KHz
v: height 2160 start 2168 end 2178 total 2250 clock 30.00Hz
3840x2160 (0x6d) 296.703MHz +HSync +VSync
h: width 3840 start 4016 end 4104 total 4400 skew 0 clock 67.43KHz
v: height 2160 start 2168 end 2178 total 2250 clock 29.97Hz
2560x1440 (0x6e) 241.500MHz +HSync -VSync
h: width 2560 start 2608 end 2640 total 2720 skew 0 clock 88.79KHz
v: height 1440 start 1443 end 1448 total 1481 clock 59.95Hz
1920x1080 (0x6f) 148.500MHz +HSync +VSync
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.50KHz
v: height 1080 start 1084 end 1089 total 1125 clock 60.00Hz
...
答案1
@matigo 说得对。使用 USB-C 转 DisplayPort 电缆可以获得 60Hz 刷新率。