On Fri, Nov 09, 2012 at 07:34:18AM +0000, Dom wrote: > On 09/11/12 00:46, Tony Baldwin wrote: > >On Thu, Nov 08, 2012 at 07:27:59PM -0500, Tony Baldwin wrote: > >>I've been having occasional lock ups. > >>The screen will blank out like X has crashed and I see a tty login, > >>but still see a mouse pointer, but can not type to login, and the > >>mouse pointer will be stuck. > >>Can't get any input to machine with keyboard (like to switch to another > >>tty even), etc., so I reset or do a hard shutdown and reboot. > >> > >>I dig into dmesg, and the only common thread I'm seeing is that it > >>happens when my Samsung Galaxy is plugged into the machine to recharge > >>it. If your computer has crashed, and you hard reset it, then there was probably no chance for any debugging information to be written to the logs. I would possibly suggest attempting to SSH in and see if the machine is responding, but if it's getting triggered by USB, then it's likely to be a kernel issue, which means that won't work. > > > > >Okay, I've looked in /var/log/kern.log > >I think I found relevant stuff just before this latest lock-up. > >I grabbed a whole bunch of it, mentioning CD-ROM, usb mass storage device and Samsung > >(it's a phone, not an optical drive). Looking at that, the USB connection is particularly flaky. "Device not responding to set address", "WARN: short transfer on control ep" and so on. One thing that strikes me here is that it's the XHCI driver complaining. XHCI is the USB 3.0 driver (USB 2 is EHCI and USB 1 is either OHCI or UHCI, depending on your motherboard). USB 3 is fairly new, so a newwer kernel might help. That could be a red herring, though. > > I can't help with the issue, I'm afraid, but I can shed a little > light on this. > > The phone contains an image of its "Driver CD" and presents this to > the USB host as a CD-ROM, as well as presenting itself as a mass > storage device. > > The idea is that you can just plug the phone into your PC, it sees a > CD drive with the drivers disc in and installs them (and, > optionally, any additional software). Then it sees the device > properly. This is usually for Windows users. You might try installing the usb-modeswitch package, which should tell the USB device "I don't need the fake-CD any more".
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