On Mon, 1 May 2006, David Brownell wrote: > I'd go for just removing all the "is it bus powered" logic, given that > peripheral firmware doesn't seem to handle it reliably enough. A comment > about those firmware bugs would be useful.
Okay. > On Monday 01 May 2006, Alan Stern wrote: > > Now there's a bugzilla report (6448) in which it turns out that an Apacer > > MP3 player crashes when it receives the Get-Device-Status request! > > Yuck. One nice thing about open source is that it's actually possible > to fix bugs like that. Has anyone found out what Apacer plans to do > about that bug of theirs? Reported them to USB-IF, if they're claiming > to be USB 2.0 conformant? :) I haven't reported anything. For that matter, I don't even know whether they do claim to be USB-2.0 conformant. > Note that nothing was checking the GET_DEVICE_STATUS request; that > probably failed, and the host should have logged a fault right instead > of later. >From the usbmon log, you can see that Get-Device-Status got a STALL and so did the following Set-Configuration. I'm assuming that means the firmware crashed, although in fact it might not have been quite so bad. There _was_ an error message in the kernel log, but it was for the failure of the Set-Configuration, not the failure of the Get-Device-Status. I didn't bother to report errors there since they didn't seem particularly important; the code was conservative and assumed the device was bus-powered unless it learned otherwise. 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
