On Fri, Apr 01, 2011 at 04:52:19PM -0400, John T. Cox wrote: > We have encountered an issue where USB printers stop working. When this happens > a number of secondary things occur: init does not function properly, the system > cannot be be shutdown or rebooted from the command line, lsusb hangs, and some > items specific to our systems. > > In my research I have found references to this issue going back at least 3 > years. > > I am going to skip some of the suggested information because this problem has > been reported on all major Linux distributions and many kernel versions over > the past several years. Also, lsusb will hang after the problem occurs. What I > have not seen before, is how to reproduce the issue. The problem has been > reported on USB keyboards or mice but, I have seen it on many USB printers, > some external drives and a video camera. We have mostly Intel and Dell USB > controller chipsets but it has been reported on others. > > How to reproduce: > Take a system with a USB attached printer (I think all of ours are > multi-function ones, my testing was on a Brother 8220). > 1. Unplug the USB cable or power off > 2. Plug it back in or power the printer back on. > 3. Repeat step 1. > You should know have a kernel Ooops in USB-Core. > > I have provided the demsg and strace lsusb info below. I would REALLY like to > see this issue get fixed as soon as possible. It is rather critical for us. If > you cannot reproduce this, need more information or whatever it takes, please > let me know and I will be happy to provide whatever I can if it will help get > this issue resoled. > > > relevant dmesg: > > CPU: 0 > EIP: 0060:[<f89b99ff>] Tainted: G U VLI > EFLAGS: 00010246 (2.6.16.60-0.54.5-default #1) This is a _very_ old kernel version. Can you still duplicate this on a modern kernel release? If you are stuck at this kernel version due to a support contract, please contact your vendor for a fix for this. And yes, I have seen reports of this on older kernels, but it is not reproducable on the 2.6.32 kernel at the least. thanks, greg k-h -- 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
