我撤回前几天对拓展坞的推荐

之前的推荐

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