On Tue, 17 Jun 2014, Dennis New wrote: > On Thu, 12 Jun 2014 10:20:54 -0400 (EDT), Alan Stern wrote: > > Dennis and Matteo: > > > > I promised to send both of you a patch changing the way ohci-hcd > > handles hardware bugs. Well, it's finally ready for testing. There's > > only a limited amount I can do on my own machine, so now it's up to > > you guys. > > > > The patch was made against an early -rc version of 3.15, but it will > > apply okay to 3.14 and maybe even earlier kernels. > > So, it happened again, after a random few days, this time with dmesg a > bit different: > > [210263.872368] ohci-pci 0000:00:13.0: frame counter not updating; > disabled > [210263.872377] ohci-pci 0000:00:13.0: HC died; cleaning up > [210263.872456] usb 2-4: USB disconnect, device number 4 > [210264.872344] timeout: still 2 active urbs on EP #3 > > The frame counter indeed was not updating. I notice that this time, it > says there are "still 2 active urbs", whereas before it always said 3. > I also noticed that before I would still get "USB disconnect" messages > when I unplugged my device, but not this time. It looks like there was > a more thorough disabling of the usb/ohci system this time. That "timeout:" message came from the snd-usb-audio driver. I don't know if the number of URBs is especially significant, probably not. The lack of "USB disconnect" messages is expected, because as you realized, the OHCI driver was disabled. Anyway, it looks like things are working better than they did before. Your system isn't crashing when the problem occurs, right? This might not be the solution you wanted, but I think it's the best we can do. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
