On Tue, 13 Oct 2020 at 00:09, Tim via users <users@lists.fedoraproject.org> wrote:
> Samuel Sieb: > >> That's not the kernel causing the disconnect. This is a message > >> from the kernel saying that the device disconnected and then > >> reconnected. > > ITwrx: > > Right. Like when the cable is going bad, or the device itself is > > failing. > > And the connectors... > > If the connection feels in the slightest bit loose, then it can lose > connection with the tiniest vibration. It doesn't necessarily have to > be on the end of a cable that gets moved (like a mouse), it only has to > momentarily break then reconnect to upset the computer. > > I've had that with a brand new USB hub. I had to bend the tangs in its > USB sockets to make them grip the plugs properly. > > Any long-time used USB connectors are quite likely to be weakened, > whether that's a connector that you keep plugging and unplugging, or > even one that's always got the same thing connected. The electrical > contacts don't have a particularly strong grip inside a USB connection, > and the mechanical bits that hold the plug in place are quite > important. > There were many problems with the old parallel ATA and SCSI ribbon cable connectors that used an incorrect alloy that lost spring tension over time. I encountered one that became so loose it would fall off the drive when the PC was moved so began replacing cables that were "too easy" to plug and unplug. There have also been problems with very thin plating on the contact surfaces exposing a substrate metal that was prone to corrosion. Check the problem socket for debris (dust buildup) that could interfere with the connection or signs of corrosion (usually green). -- George N. White III
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