我撤回前几天对拓展坞的推荐😅

之前的推荐

https://www.v2ex.com/t/985464

遇到的问题

我原来用 intel MBP 16 ，连这个拓展坞从 Monterey 用到 Sonoma 一直没问题。

买了个 M1 MAX MBP ，发现只要开启 BetterTouchTool ，系统会时不时不执行触控板的点击操作。（ Monterey 12.7-12.7.1 ）

检查到最后，发现原因是大功率充电器（大于 65W ）插在 satechi 这个 9 合 1 扩展坞上连接 M1 MAX 的 MacBook 时，拓展坞只有 USB2.0 的速度、并且反复高频断开然后重新连接。

但是在之前的 intel MBP 上相同的连接方式不会有任何问题。我怀疑是这个拓展坞和 M1 的 Mac 不兼容？

这个逻辑链条太跳脱了，我检查了五六个小时才终于搞清楚……😅

这下我只能再买个贝尔金的拓展坞了。

测试过程中用到的其它变量

• 绿联拓展坞：插电源线无此问题，给 Mac 充电功率为「充电器功率-15W 」
• 绿联拓展坞 2 号，带千兆网口的：插电源线连 Mac 无此问题，给 Mac 充电功率为「充电器功率-15W 」
• 贝尔金老的那款带千兆网口的 6 合 1 拓展坞，:插电源线连 Mac 无此问题，给 Mac 充电功率为 60W
• 苹果原装 94W 、140W 充电器，Anker 65W 单口充电器、Aohi 100W 双口充电器：只要连接 satechi 拓展坞时的充电功率到了 65W 这个节点（拓展坞扣掉一点，连到电脑上时的充电功率会低一些），就都有此问题
• M1 MAX 的 MacBook 每个 C 口都有此问题。

检测 USB 设备连接的方法

使用 Hammerspoon 加载这段代码，然后进 Hammerspoon 的 console 看实时 log ，就能看到 USB 设备连接断开的情况：

usbConnectsTimer = hs.timer.new(3, function()
    usbConnectsTimer:stop()
    print("> usb connect for devices: " .. usbConnectsDevs)
    usbConnects = 0
    usbConnectsDevs = nil
  end)
 
  usbDisconnectsTimer = hs.timer.new(3, function()
    usbDisconnectsTimer:stop()
    print("> usb disconnect for devices: " .. usbDisconnectsDevs)
    usbDisconnects = 0
    usbDisconnectsDevs = nil
  end)
 
  usbConnects = 0
  usbDisconnects = 0
  usbDCWatcher = {}
 
  usbMonitor = hs.usb.watcher.new(function(info)
    -- iNotify(log,"USB Monitor: " .. info['eventType'] .. " " .. info['vendorName'] .. " " .. info['productName'])
    local event = info['eventType']
    local vendor = info['vendorName']
    local product = info['productName']
    print("USB Monitor: " .. event .. " " .. vendor .. " " .. product)
    if event == "added" then
      if usbDebugAllConns then
        usbConnectsTimer:setNextTrigger(3)
        usbConnects = usbConnects + 1
        if usbConnectsDevs ~= nil then usbConnectsDevs = usbConnectsDevs .. ", " .. vendor .. " " .. product else usbConnectsDevs = vendor .. " " .. product end
      end
      if usbDebugReconns then
        currTime = hs.timer.secondsSinceEpoch()
        for i, v in pairs(usbDCWatcher) do
          if currTime-v>30 then usbDCWatcher[i] = nil end
        end
        if usbDCWatcher[vendor .. " " .. product] ~= nil then
          print("USB Device reconnect occured: " .. vendor .. " " .. product)
        end
      end
    elseif event == "removed" then
      if usbDebugAllConns then
        usbDisconnectsTimer:setNextTrigger(3)
        usbDisconnects = usbDisconnects + 1
        if usbDisconnectsDevs ~= nil then usbDisconnectsDevs = usbDisconnectsDevs .. ", " .. vendor .. " " .. product else usbDisconnectsDevs = vendor .. " " .. product end
      end
      if usbDebugReconns then usbDCWatcher[vendor .. " " ..product]=hs.timer.secondsSinceEpoch() end
    else print("Unknown USB event in usb watcher") end
  end):start()
 
  function getUsbDevices()
    local devs = hs.usb.attachedDevices()
    local cnt = 0
    local res = {}
    local vendor
    for i,v in pairs(devs) do
      cnt = cnt + 1
      if v['vendorName'] ~= nil then vendor = v['vendorName'] else vendor = "(no vendor)" end
      if v['productName'] ~= nil then product = v['productName'] else product = "(no productname)" end
      table.insert(res,vendor .. " " .. product)
    end
    table.sort(res)
    print("\n" .. table.concat(res,"\n"))
    print(cnt .. " devices attached")
  end

外设重连、断开的 log 展示

2023-10-28 21:48:58: USB Monitor: removed VIA Labs, Inc.          USB2.0 Hub             
2023-10-28 21:48:58: USB Monitor: removed VIA Labs, Inc.          USB Billboard Device   
2023-10-28 21:48:58: USB Monitor: removed VIA Labs, Inc.          USB2.0 Hub             
2023-10-28 21:48:58: USB Monitor: added VIA Labs, Inc.          USB2.0 Hub             
2023-10-28 21:49:00: USB Monitor: removed VIA Labs, Inc.          USB2.0 Hub             
2023-10-28 21:49:00: USB Monitor: added VIA Labs, Inc.          USB2.0 Hub             
2023-10-28 21:49:01: USB Monitor: added VIA Labs, Inc.          USB Billboard Device   
2023-10-28 21:49:01: USB Monitor: added VIA Labs, Inc.          USB2.0 Hub             
2023-10-28 21:49:02: USB Monitor: removed VIA Labs, Inc.          USB Billboard Device   
2023-10-28 21:49:02: USB Monitor: removed VIA Labs, Inc.          USB2.0 Hub             
2023-10-28 21:49:02: USB Monitor: added VIA Labs, Inc.          USB2.0 Hub             
2023-10-28 21:49:02: USB Monitor: added VIA Labs, Inc.          USB Billboard Device   
2023-10-28 21:49:03: USB Monitor: added VIA Labs, Inc.          USB2.0 Hub             
2023-10-28 21:49:03: USB Monitor: added VIA Labs, Inc.          USB Billboard Device   
2023-10-28 21:49:03: USB Monitor: removed VIA Labs, Inc.          USB2.0 Hub             
2023-10-28 21:49:03: USB Monitor: removed VIA Labs, Inc.          USB Billboard Device   
2023-10-28 21:49:03: USB Monitor: removed VIA Labs, Inc.          USB2.0 Hub         

往下无限add remove循环。

在 intel Mac 上连这个拓展坞的 log 就这样直接结束：

2023-10-29 14:18:19: USB Monitor: added VIA Labs, Inc.          USB3.0 Hub             
2023-10-29 14:18:19: USB Monitor: added VIA Labs, Inc.          USB2.0 Hub             
2023-10-29 14:18:20: USB Monitor: added VIA Labs, Inc.          USB3.0 Hub             
2023-10-29 14:18:20: USB Monitor: added VIA Labs, Inc.          USB2.0 Hub             
2023-10-29 14:18:20: USB Monitor: added Realtek USB 10/100/1000 LAN
2023-10-29 14:18:22: USB Monitor: added VIA Labs, Inc.          USB Billboard Device