This message is a repost. I did not include the complete original message in my initial reply, and I am doing so now. > On Mon, 11 Mar 2013, Frank Peters wrote: > > > When I boot my x64 Linux system to the console a continuous series > > of "USB disconnect/reconnect" messages appears in the kernel log. > > The disconnect/reconnect messages concern the USB mouse: > > > > usb 1-1.3: USB disconnect, device number N > > usb 1-1.3: new low-speed USB device number N+1 using ehci-pci > > input: Microsoft Microsoft Basic Optical Mouse v2.0 as /devices/pci0000:00/0000:00:1a.0 usb1/1-1/1-1.3/1-1.3:1.0/input/input5 > > hid-generic 0003:045E:00CB.0006: input: USB HID v1.11 Mouse [Microsoft Microsoft Basic Optical Mouse v2.0 ] on usb-0000:00:1a.0-1.3/input0 > > .... > > > > These "USB disconnect/reconnect" messages will repeat roughly every 40 seconds > > with the device number "N" increasing to "N+1" each time. > > > > The interesting thing about this behavior is that I can stop the messages, > > and presumably the disconnects, by starting the General Purpose Mouse (gpm) > > server: > > > > gpm -m /dev/input/mice -t imps2 > > > > If I then terminate the gpm server, the USB disconnect/reconnect messages > > will start to occur once again. > > > > The USB disconnects also stop when I start the graphical X server. > > > > It would seem that if nothing is "grabbing" the USB mouse (i.e. gpm or X) > > then the kernel somehow automatically disconnects it. > > > > My system has the USB built in to the kernel (no modules). > > > > The motherboard I use is Intel DP55KG which has the P55 Express > > chipset to control the USB. > > > > I've seen this behavior on the current kernel-3.8.x and also > > on the previous kernel-3.7. I have not tested anything earlier. > > > > Please CC to frank.peters@xxxxxxxxxxx as I am not subscribed to > > the list. > > [ adding linux-usb@ to CC ] > > Do you have USB autosuspend enabled on that device? > The CONFIG_USB_SUSPEND, which controls USB autosuspend, is not available to me during kernel configuration because I do not enable "Run-time PM core functionality" (PM_RUNTIME). Based on this, I would assume that USB autosuspend is not enabled. Frank Peters -- 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
