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. > > The bus number doesn't matter; it's allowed to change every time you > reboot. The bus change without a reboot! > > The two traces are almost identical. This is puzzling; I don't see any > significant differences at all. > The problem is that the machine complete freeze, so the dump stops. I get no crash log or anything else. The computer is still dead. Only the LED of the usb flash storage is very fast flashing. > It looks like you will have to use git bisect to find the change that > caused the regression. > That's to dangerous for me, because it is a production machine. - 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
