在 Dell Wd19 系列媒體插槽座上連接雙 Qhd 顯示器時,安裝 Ubuntu 的 Latitude 9420 無法切換顯示模式
Summary: 連接至具備雙 QHD 顯示器的 Dell WD19 系列媒體插槽座時,顯示器模式未切換的相關資訊。
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Symptoms
在 Dell WD19 系列媒體插槽座上連接至雙 QHD (2560x1440) @60Hz顯示器時,安裝 Ubuntu 20.04 的 Latitude 9420 無法間歇性切換顯示模式。
Cause
QHD (2560x1440) @60hz影像訊號使用 5.6 Gbps 的頻寬。2 QHD 影像訊號超過 HBR2 的 8.6 Gbps 頻寬。Linux 僅支援 HBR2。
Resolution
此功能按照設計運作,因應措施是將重新整理速率切換為 30 hz。
如需 Linux 設定的 WD19 系列媒體插槽座使用者手冊中提供更多資訊: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 9420Products
Dell Dock WD19, Dell Performance Dock - WD19DC, Dell Performance Dock – WD19DCS, Dell Dock – WD19S, Dell Thunderbolt Dock - WD19TB, Dell Thunderbolt Dock – WD19TBS, Latitude 9420Article Properties
Article Number: 000187274
Article Type: Solution
Last Modified: 24 Apr 2025
Version: 6
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