Hi Terry, > Well OK. I am surmising that there are conflicts when the three > devices are all shouting.
OK, but they're not playing audio at this point, just there for bus enumeration, current negotiation, etc. > The problem only occurs (and it occurs every time) if I try to connect > the hub through one USB port. Have you seen the list of issues on https://www.raspberrypi.org/documentation/hardware/raspberrypi/usb/README.md It's out of date, I think, but then so much of the Pi documentation is frankly shoddy and incomplete. Because of the OTG hardware limitations, if too many Full- or Low-speed devices are plugged into a single-TT hub, unreliable operation of the devices may occur. > > Try and create a CPU load some other way > > Wouldn't that also be a problem when the Adaptors are plugged directly > into the Pi? No, because they'd be powered differently then so could have different behaviour? > > gzip -9 </dev/urandom >/dev/null > > > > Check `dmesg' output. `dmesg -w' will wait for new output, similar > > to journalctl above. > > Will need the £11 cable to do those things. Don't think so because the USB keyboard will continue to work unless CPU load causes a crash, and if it does then that's good. Cheers, Ralph. -- Next meeting: Bournemouth, Tuesday, 2017-02-07 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:[email protected] / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
