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lsusb - 我總是無法開啟裝置。這是正常的嗎？

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lsusb - 我總是無法開啟裝置。這是正常的嗎？

當我寫作時，lsusb -v我總是得到"Couldn't open device, some information will be missing"每輛公車的這是否正常？

PS：我試著從透過 USB 連接的雷射掃描器讀取資料。但我收到“無法打開串行端口”。我想檢查端口lsusb，發現每個 USB 端口上都寫著“無法打開設備”。即使對於我的滑鼠，它也顯示“無法打開”，但它可以工作。

答案1

是的。您正在詢問硬體信息，因此某些資訊可能需要 sudo。看看2個之間的差異...

rinzwind@schijfwereld:~$ lsusb -v | grep device
Couldn't open device, some information will be missing
Couldn't open device, some information will be missing
Couldn't open device, some information will be missing
Couldn't open device, some information will be missing

當使用 sudo 時，它會消失，但您會收到其他通知：

rinzwind@schijfwereld:~$ sudo lsusb -v | grep device
can't get debug descriptor: Resource temporarily unavailable
      Lowest fully-functional device speed is SuperSpeed (5Gbps)
can't get debug descriptor: Resource temporarily unavailable
Device Qualifier (for other device speed):
can't get device qualifier: Resource temporarily unavailable
can't get debug descriptor: Resource temporarily unavailable
can't get device qualifier: Resource temporarily unavailable
can't get debug descriptor: Resource temporarily unavailable

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