我有以下设置：
- 运行 Ubuntu 15.04（从 14.10 升级）的联想 T440s
- 华硕 PB278Q（支持 DisplayPort 1.2）
- AmazonBasics mini-DisplayPort 转 DisplayPort 线缆
系统信息：
$ inxi -Fx
System: Host: bipinnate Kernel: 3.19.0-18-generic x86_64 (64 bit gcc: 4.9.2)
Desktop: Unity 7.3.2 (Gtk 3.14.12) Distro: Ubuntu 15.04 vivid
Machine: System: LENOVO product: 20AQCTO1WW v: ThinkPad T440s
Mobo: LENOVO model: 20AQCTO1WW v: SDK0E50510 PRO
Bios: LENOVO v: GJET72WW (2.22 ) date: 02/21/2014
CPU: Dual core Intel Core i7-4600U (-HT-MCP-) cache: 4096 KB
flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 10774
clock speeds: max: 3300 MHz 1: 2761 MHz 2: 2406 MHz 3: 2099 MHz
4: 2053 MHz
Graphics: Card: Intel Haswell-ULT Integrated Graphics Controller
bus-ID: 00:02.0
Display Server: X.Org 1.17.1 drivers: intel (unloaded: fbdev,vesa)
Resolution: [email protected]
GLX Renderer: Mesa DRI Intel Haswell Mobile
GLX Version: 3.0 Mesa 10.5.2 Direct Rendering: Yes
Audio: Card-1 Intel 8 Series HD Audio Controller
driver: snd_hda_intel bus-ID: 00:1b.0
Card-2 Intel Haswell-ULT HD Audio Controller
driver: snd_hda_intel bus-ID: 00:03.0
Sound: Advanced Linux Sound Architecture v: k3.19.0-18-generic
Network: Card-1: Intel Ethernet Connection I218-LM
driver: e1000e v: 2.3.2-k port: 3080 bus-ID: 00:19.0
IF: eth0 state: down mac: 28:d2:44:75:99:2e
Card-2: Intel Wireless 7260
driver: iwlwifi v: in-tree: bus-ID: 03:00.0
IF: wlan0 state: up mac: 7c:7a:91:97:1a:9e
Drives: HDD Total Size: 512.1GB (25.1% used)
ID-1: /dev/sda model: SAMSUNG_MZ7TD256 size: 256.1GB temp: 0C
ID-2: /dev/sdb model: TS256GMTS400 size: 256.1GB temp: 45C
Partition: ID-1: / size: 211G used: 113G (57%) fs: ext4 dev: /dev/sdb2
ID-2: swap-1 size: 8.00GB used: 0.00GB (0%) fs: swap dev: /dev/sdb1
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 49.0C mobo: N/A
Fan Speeds (in rpm): cpu: 0
Info: Processes: 203 Uptime: 5:28 Memory: 1183.5/11900.9MB
Init: systemd runlevel: 5 Gcc sys: 4.9.2
Client: Shell (bash 4.3.301) inxi: 2.2.16
我想在这台笔记本电脑上使用华硕外接显示器。但是，当我插入它时，它似乎没有被检测到。在显示器提示中单击“检测显示器”没有任何反应，最终显示器进入待机状态。
我曾成功使用 VGA 端口在低分辨率下进行演示等，但我需要让 DisplayPort 工作才能驱动此显示器。这是某种驱动程序问题吗？
答案1
sudo apt-get update && sudo apt-get dist-upgrade && sudo shutdown -r now
将电缆插在显示器上，打开终端，输入：
tail -f /var/log/{messages,kernel,dmesg,syslog}
将电缆插入超极本，看看是否得到某种输出。只是看看电缆是否工作。
sudo apt-get install arandr
用于arandr设置输出。