在 Dell Wd19 系列坞站上连接双 Qhd 显示器时,安装了 Ubuntu 的 Latitude 9420 无法切换显示模式

Summary: 有关连接到具有双 QHD 显示器的 Dell WD19 系列坞站时显示模式无法切换的信息。

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.

Symptoms

在戴尔 WD19 系列坞站上连接到双 QHD (2560x1440) @60Hz显示器时,安装了 Ubuntu 20.04 的 Latitude 9420 无法间歇性切换显示模式。

Cause

QHD (2560 x 1440) @60hz视频信号使用 5.6 Gbps 的带宽。2 QHD 视频信号超过 HBR2 的 8.6 Gbps 带宽。Linux 仅支持 HBR2。

Resolution

这按照"设计"方式工作,解决方法是将刷新率切换到 30 hz。


有关更多信息,请参阅适用于 Linux 设置的 WD19 系列坞站用户手册:https://dl.dell.com/topicspdf/dell-wd19-130w-dock_users-guide_en-us.pdf

Videos


Affected Products

Dell Dock WD19, Dell Performance Dock - WD19DC, Dell Performance Dock – WD19DCS, Dell Dock – WD19S, Dell Thunderbolt Dock - WD19TB, Dell Thunderbolt Dock – WD19TBS, Latitude 9420

Products

Dell Dock WD19, Dell Performance Dock - WD19DC, Dell Performance Dock – WD19DCS, Dell Dock – WD19S, Dell Thunderbolt Dock - WD19TB, Dell Thunderbolt Dock – WD19TBS, Latitude 9420
Article Properties
Article Number: 000187274
Article Type: Solution
Last Modified: 24 Apr 2025
Version:  6
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.