Am Montag, den 10.02.2014, 12:09 -0500 schrieb Alan Stern: > On Mon, 10 Feb 2014, Stefani Seibold wrote: > > > Am Montag, den 10.02.2014, 10:56 -0500 schrieb Alan Stern: > > > On Mon, 10 Feb 2014, Stefani Seibold wrote: > > > > > > > Hi, > > > > > > > > the USB storage does not longer work on my DELL PRECISION M6400 with a > > > > plain vanilla 3.13 kernel. > > > > > > > > When i attach a USB storage flash memory the system freeze immediately > > > > or after accessing the flash. It makes not difference mounting via a > > > > GNOME desktop or mounting as root in a text console. > > > > > > > > There is no problem with all previous kernel like 3.12.7, everything is > > > > okay. > > > > > > > > All of the previous vanilla kernels works perfectly since nearly six > > > > years on my workstation. > > > > > > > > What kind of information do you need to figure out the problem and fix > > > > this regression? > > > > > > It would help to see a usbmon trace from 3.13 together with a usbmon > > > trace from an earlier, working kernel. (The instructions are in > > > Documentation/usb/usbmon.txt.) Start the usbmon trace just before you > > > plug in the flash device. > > > > > > Alan Stern > > > > > > > I did and attached the USB trace for 3.13.2 and for 3.12.7. > > > > One interesting thing was that the bus in 3.12.7 was sometimes 6 and > > sometimes 2. > I have more information about the bug. I tested with a USB 3.0 Expresscard and this works with 3.13. I also found an old USB 1.1 HUB in my USB gadget box. When i attach the USB flash storage to the USB 1.1 hub there is also no problem. Since the USB 1.1 Hub is attached to the EHCI we can assume that the bug is not in the phy support nor in the USB storage driver. So i thing the bug must be located in the EHCI HC driver. - Stefani -- 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
