On Fri, 9 Feb 2007, Jon Smirl wrote: > > I received the device in the mail today and tested it. My experience > > echoes yours exactly, except that I didn't actually try to use the device > > after resuming it. I presume you have tried and it doesn't work? > > Device does not work after resume. But it is easy to test it just plug > your PC powered speakers into the green (i think) jack. You can ignore > the 5.1 support.
I was short on time and didn't try to play anything through the device. That's the next thing I'll do. > It only took the distributions about three years to get ALSA set up > correctly to work with 6 channel USB audio. > > I forgot about this, there is low level documentation available. > http://www.linux-usb.org/Philips_PSC805_HID_Reports_1.4.pdf > > > > > Anyway, the story is this. As far as usbcore is concerned, the device > > _appears_ to work fine. It suspends and resumes okay. The device status > > fetch done by finish_port_resume() succeeds. The HID driver resubmits its > > interrupt URB, and the device sends back NAKs. > > > > But the power LED doesn't turn back on. The device behaves precisely the > > What looks like a power LED is not one. It is the mute button and > under software control from the host so it isn't telling us anything. > I originally thought it was a power LED but then figured out that it > wasn't. Are you certain? The mute button is on the top front edge, but the light appears about 2/3 of the way up the front side. (There may be another light right on the mute button as well; I can't remember.) So you're suggesting that perhaps the device resumes with the Mute turned on? That would still be a bug, but not a terribly serious one. > Have you tried any kind of low level USB monitor on it? I did. As far as it indicates, after a resume everything is normal. But of course, that's without trying to play anything. > > same regardless of whether it is connected to an Intel UHCI, a VIA UHCI, > > or an NEC OHCI controller. This really does appear to be a bug in the > > device. Maybe it wants some special command before it will wake up > > fully... but a reset works just as well. > > How do you explain it working on a hub, but not on a host? I haven't tried that yet. Too short on time... > > This looks like a prime candidate for a quirks entry. I will create one > > later on. And I'll mail the device back early next week. > > No hurry, keep it as long as you think it will be useful. Stick some > speakers on it and check it out, it sounds way better than typical > motherboard audio. Not bad for $40. Okay, we'll see what happens. Alan Stern ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
