On Thu, 2 Jan 2014, Sarah Sharp wrote: > On Sun, Dec 29, 2013 at 06:28:20AM -0800, Eric Decker wrote: > > When I boot using a live USB (the kernel in this case is > > vmlinuz-3.11.0.12-generic), I see a couple of messages and then the kernel > > finishes (that is it doesn't hang). *Although the number of reattaches > > seems suspect.* By "reattaches", do you mean that the ELAN touchscreen disconnects from the USB bus and then reconnects? > > Now when I boot with Ubuntu 13.10 as installed (kernel > > vmlinuz-3.11.0.14-generic), I see the ELAN connecting and disconnecting > > over and over again on the usb bus. It looks similar to what Drew > > originally reported except I'm not seeing error -71. It just keeps on > > happening and this seems to prevent the kernel from finishing the boot > > process. > > > > > > I just tried to duplicate the behaviour. I basically started over with a > > fresh copy of Ubuntu 13.10 from my liveUSB. It has kernel > > 13.11.0-14-generic and it goes from usb device 4 up through 13 which is > > basically what the -12 kernel did. This was with a fresh install and > > before I started messing with additional packages. > > > > > > Well I just finished doing everything that I thought I did before. (I > > just finished installing Bumblebee for the nvidia controller) And it is > > behaving itself. So probably going to chaulk this one up to gremlins. > > Thoughts? If you get different behavior at different times using the same software, then most likely it's an intermittent hardware problem. > It sounds like you have electrical issues with the internally connected > touchscreen. I wouldn't be surprised if it starts connecting and > disconnecting again at some random time in the future. I would highly > recommend returning the laptop and getting a new laptop if possible. Especially if the same sort of thing happens when you boot the laptop with a different OS. > Depending on what Alan says, it might be useful to see a USB mon trace, > and the documentation for how to capture that is here: usbmon can be helpful when the disconnection is caused by the OS sending a request that the device doesn't understand and can't handle. However, such things tend to be very reproducible, which means it probably isn't the reason for this problem. 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
