Date: Sun, 14 Jan 2024 08:36:04 -0800 From: bob prohaska <fbsd@www.zefox.net> To: freebsd-arm@freebsd.org Subject: Re: USB-serial adapter suggestions needed Message-ID: <ZaQNdBIwcy%2BjPKFW@www.zefox.net> In-Reply-To: <ZaO88u6zT2oUeT4s@int21h> References: <ZZoOMoM/iwcFqSNi@www.zefox.net> <7D27DF9F-AA9A-4D44-BC28-8CC637D0F550@yahoo.com> <C40967D3-D480-41DD-8054-421EA7AE5EFE@yahoo.com> <ZaO88u6zT2oUeT4s@int21h>
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On Sun, Jan 14, 2024 at 10:52:34AM +0000, void wrote: > Hi Bob, > > The following *may* be useful to you.. > > (rpi4 context) > > I've noticed, both on 13-stable and 14-stable, that, if both > onboard usb2 ports are utilised (eg keyboard & mouse) that > signals keyboard<>mouse interfere with each other. > It's easy to reproduce this problem. It's been a while > since testing that exact context, though. > > When running headless, I needed to make sure the ups cable > (serial) was plugged into the remaining usb3 port (and not usb2 > where a wifi dongle was plugged in) because communication from > the ups would make the wifi page down if both were plugged into the usb2 > side. The wifi would make the usb serial misbehave (caused 'no signal coming > from ups' type of error) too. > > I've had to press the hardware into service so cannot produce detailed error > output for now. At the moment I have two Pi4's, one running FreeBSD-current. That machine has a USB hard disk (boot device) in one USB 3 port, an ft232 usb-serial adapter (probably USB 2) in the other USB 3 port, with a keyboard and mouse pulugged into the two USB 2 ports. I've not noticed any problems with either keyboard or mouse. Of course, all are plugged in all the time, so there's only one enumeration happening, at boot. The Pi4 that I reported the problem with runs 64 bit RasPiOS. It has a single USB 3 hard disk (boot device) and a usb 2 keyboard with an internal hub, the mouse being plugged into the hub. It boots fine with that combo, I haven't tried moving the mouse to the other usb 2 port. When it's convenient to provoke a crash I'll try. I intended the mention of RasPiOS trouble with USB as recognition that USB is imperfect. I didn't mean to suggest that if Linux can't do something FreeBSD shouldn't try. Thanks for writing, bob prohaska
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