On Fri, Mar 8, 2013 at 2:27 PM, Frank Peters <frank.pet...@comcast.net> wrote: > Hello, > > After compiling kernel-3.8 (plain vanilla) I begin to see lots of these > entries in the kernel log: > > usb 1-1.3: USB disconnect, device number 4 > usb 1-1.3: new low-speed USB device number 5 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/input2 > > These entries are repeated, with the device number increasing (+1) > each time. > > The odd thing is that these USB disconnects occur only in console mode. > My system boots up to the console and the messages appear roughly every > 60 seconds. But when I start X, the messages suddenly stop. There may > be only one or two USB disconnects over the next 12-16 hours. The only > difference between console mode and X is that the mouse is only active > under X. > > The system remains stable, but for some reason, the USB mouse will repeatedly > disconnect in console mode, but also rarely in X. > > I have searched for references to the problem but could only find a > possible similar issue with 3.8-rc1 > > https://lkml.org/lkml/2012/12/23/100 > > Has anyone else seen this "USB disconnect" problem with kernel-3.8.x? > > It could be that my motherboard is failing (it's approx. 2 years old) but > then why would the USB disconnects suddenly halt under X. > > USB is built in to the kernel; there are no USB modules loaded. > > Any comments on how I could investigate this further would be appreciated.
I do not know the cause of your problem, but if it's a machine you can afford to reboot a few times, I would try doing a git bisect between that kernel and the previous working one, and e-mailing your results to the person whose name is on the offending commit.
