On Wed, 29 Jun 2011, Alan Stern wrote: > On Wed, 29 Jun 2011, Arkadiusz Miskiewicz wrote: > > > On Wednesday 29 of June 2011, Alan Stern wrote: > > > On Wed, 29 Jun 2011, Arkadiusz Miskiewicz wrote: > > > > Hi, > > > > > > > > Something broke between rc3 and rc5. Thinkpad t400, logitech usb mouse. > > > > After resume from ram usb device no longer works. Somewhere around rc3 it > > > > was working fine. > > > > > > Obviously you can try bisection to find the problem. But if you don't > > > want to go through that, you could post the dmesg from a kernel that > > > has CONFIG_USB_DEBUG enabled. > > > > CONFIG_USB_DEBUG will be faster but I'll bisect if no one figures out what's > > wrong. > > Actually bisection might end up being quicker. This looks like a > pretty tricky problem. Maybe you should start a bisection while I look > at this stuff; you'll probably reach an answer before I do! > > > Note that I tried to unplug & plugin usb mouse after all this dmesg but > > nothing new appeared in dmesg - kernel didn't notice that I did that. The log suggests that something went wrong somewhere around here: [ 73.811538] usb 2-4: unregistering interface 2-4:1.7 [ 73.811594] cdc_ether 2-4:1.7: wwan0: unregister 'cdc_ether' usb-0000:00:1d.7-4, Mobile Broadband Network Device [ 73.823457] done. [ 73.823470] video LNXVIDEO:00: Restoring backlight state [ 74.056070] usb usb3: suspend_rh (auto-stop) (I don't have any idea what that "done" refers to.) There should have been additional messages about unregistering interfaces 2-4:1.8, 2-4:1.9, and 2-4:1.10. So perhaps the cdc_ether unregistration got hung up. Can you get a stack trace for the khubd thread at this point? Also, you can try unloading cdc-ether before starting the suspend to see if that makes any difference. 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
