![从 HP 15-as152nr 笔记本电脑输出 4k@60hz](https://linux22.com/image/1548548/%E4%BB%8E%20HP%2015-as152nr%20%E7%AC%94%E8%AE%B0%E6%9C%AC%E7%94%B5%E8%84%91%E8%BE%93%E5%87%BA%204k%4060hz.png)
我已经以任何方式想到了这一点,我无法弄清楚如何在外部显示器(可以是任何人,实际上不受预算限制)上输出的解决方案4k@60hz
。
笔记本电脑已Ubuntu 16.04.3 LTS
安装最新的英特尔驱动程序:
➜ sudo lshw -c video
*-display
description: VGA compatible controller
produit: Intel Corporation
fabriquant: Intel Corporation
identifiant matériel: 2
information bus: pci@0000:00:02.0
version: 02
bits: 64 bits
horloge: 33MHz
fonctionnalités: pciexpress msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
ressources: irq:126 mémoire:b0000000-b0ffffff mémoire:a0000000-afffffff portE/S:3000(taille=64) mémoire:c0000-dffff
xrandr 输出
➜ xrandr
Screen 0: minimum 320 x 200, current 6400 x 3560, maximum 8192 x 8192
eDP-1 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
3840x2160 60.00*+ 40.00
2048x1536 60.00
1920x1440 60.00
1856x1392 60.01
1792x1344 60.01
1920x1200 59.95
1920x1080 59.93
1600x1200 60.00
1680x1050 59.95 59.88
1600x1024 60.17
1400x1050 59.98
1280x1024 60.02
1440x900 59.89
1280x960 60.00
1360x768 59.80 59.96
1152x864 60.00
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
960x600 60.00
960x540 59.99
800x600 60.00 60.32 56.25
840x525 60.01 59.88
800x512 60.17
700x525 59.98
640x512 60.02
720x450 59.89
640x480 60.00 59.94
680x384 59.80 59.96
576x432 60.06
512x384 60.00
400x300 60.32 56.34
320x240 60.05
HDMI-1 connected 2560x1440+3840+0 (normal left inverted right x axis y axis) 608mm x 345mm panning 2560x1440+3840+0
3840x2160 30.00 + 25.00 24.00 29.97 23.98
2560x1440 59.95*
1920x1080 60.00 50.00 59.94 30.00 24.00 29.97 23.98
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
这些是技术要求,目前我尝试了以下方法:
有一台显示器
Samsung U28E590D
,可在 DP 和 HDMI2 上输出 4k,有一根 HDMI2 电缆,但不起作用尝试使用以下方法处理两个显示器的不同比例
xrandr
:xrandr --output HDMI-1 --scale 1x1 --panning 2560x1440+3840+0 --fb 6400x3560 --right-of eDP-1
无法正常工作(仅获得外部屏幕的一半 - 右边)考虑过买一个 HDMI -> Dp 转换器,但一直没找到能将 HDMI -> DP 转换的,只能将 DP -> HDMI 转换的
尝试将笔记本电脑显示器缩小到全高清分辨率,但一切都太模糊了
外接显示器的分辨率提高了,但上限为@30Hz,太低了,无法每天使用。
考虑过使用 usb-c,但显然如果不是雷电的话,usb-c 就无法输出到显示器,而雷电不是..
所以我开始认为也许笔记本电脑的 HDMI 输出仅输出 HDMI < 2,这导致无法输出 4k@60hz,但找不到有关此情况的任何信息。
哦,最后一件事,显示器产品说明上说显示器仅支持 dp 上的 4k@60,而 HDMI 则支持 30hz,但发现这个亚马逊产品问题(第二个答案,报告如下,相关部分3840 x 2160 @ 60 Hz (HDMI2)
:):
Model Name: U28E590D / U24E590D
-----------------------------------------
Synchronization -> Horizontal Frequency
30 - 135 kHz (DisplayPort)
30 - 90 kHz (HDMI1)
30 - 135 kHz (HDMI2)
Synchronization -> Vertical Frequency
56 - 75 Hz (DisplayPort)
24 - 75 Hz (HDMI1/HDMI2)
Optimum Resolution
3840 x 2160 @ 60 Hz (DisplayPort)
3840 x 2160 @ 30 Hz (HDMI1)
3840 x 2160 @ 60 Hz (HDMI2)
Maximum Resolution
3840 x 2160 @ 60 Hz (DisplayPort)
3840 x 2160 @ 30 Hz (HDMI1)
3840 x 2160 @ 60 Hz (HDMI2)
-----------------------------------------
Notes: Both above models are fully FreeSync certified. The DP 1.2a+ port has Adaptive-Sync support, and can be used with AMD's FreeSync variable refresh rate technology. These models also include HDMI v2.0 ports (HDMI2) which support 4k res. @ 60Hz, while the 1st HDMI port (HDMI1) remains only HDMI v1.4ax1. This provides many different input source options.
*****************************************
Model Name: U28D590D (Older Model)
-----------------------------------------
Synchronization -> Horizontal Frequency
30 ~ 134 kHz (DisplayPort)
30 ~ 90 kHz (HDMI1/2)
Synchronization -> Vertical Frequency
56 ~ 75 Hz (DisplayPort)
24 ~ 75 Hz (HDMI)
Optimum Resolution
3840 x 2160 @ 60Hz (DisplayPort)
3840 x 2160 @ 30Hz (HDMI)
Maximum Resolution
3840 x 2160 @ 60Hz (DisplayPort)
3840 x 2160 @ 30Hz (HDMI)
-----------------------------------------
Notes: Older model supports a single DP v1.2 port and two HDMI v1.4 ports limiting 60Hz 4k connectivity to the DP port only
*****************************************
References:
Source for U28E590D data: http://downloadcenter.samsung.com/content/UM/201510/20151030173012594/BN46-00481B-Eng.pdf
Press Release: https://news.samsung.com/global/samsung-electronics-new-uhd-monitors-deliver-more-powerful-and-enjoyable-viewing-experience
Source for older model U28D590D data: http://downloadcenter.samsung.com/content/UM/201403/20140305101006156/BN46-00410A-Eng.pdf
AMD FreeSync: http://www.amd.com/en-us/innovations/software-technologies/technologies-gaming/freesync
HDMI: http://www.hdmi.org/index.aspx
DisplayPort: http://www.displayport.org/
*****************************************
免责声明:这是亚马逊的答案,不确定它有多可信,但它假设显示器有 2 个 HDMI(确实如此):一个支持 HDMI <2,其他 2+,我都试过了,xrandr 输出上出现同样的事情
欢迎任何反馈,无论是购买另一台显示器还是使用 xrandr 来缩小两个分辨率之间的差距,实际上一个是 3840*2160@60hz,另一个是 2560*1440@60hz。