Folderol wrote: > On Mon, 22 Sep 2008 13:07:07 +0930 > Matthew Smith <matt@xxxxxxxxxxxxxx> wrote: > >> Quoth Matthew Smith at 2008-09-22 11:07... >>> ALSA is not getting inbound data from the device although it can send >>> OK. The keyboard works as it should under Windows, so I can only guess >>> that there is something wrong with ALSA - either a mis-configuration or >>> a bug - but I don't even know where to start looking. >> Want to know what was stopping it working? Do you? >> >> USB hub. Yep, a nasty little bit of $10 hardware. >> >> The keyboard was connected through a USB hub. When I traced through the >> wiring, found this and plugged directly into the computer, it all >> started working. >> >> Any USB gurus like to tell us why that was? >> >> Cheers >> >> M > > At a guess - some USB hubs only work at USB 1 (or so I've read) Also, some USB hubs may not provide the full spec of power to every port on the hub if you happen to be using all of them. I'm using 5 of the 6 available ports on my little powered Zonet USB2 hub (with transfer rate to prove it!) but if I add my 2.5" external notebook hard drive to the last available port, the drive doesn't get enough juice to power up and make a connection. Directly connected to the computer, it works fine. If it's really a USB1 hub, it may not be providing enough power for everything connected to the hub when you plugged your keyboard into? -- David gnome@xxxxxxxxxxxxx authenticity, honesty, community _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
