On Tue, May 03, 2011 at 05:56:46AM -0400, Qiannan Cui wrote: > Hi all, > > I am happy to send an email to all of you for the first time. I have found something interesting when I use the lastest usb-2.6 tree. I think it is a bug maybe. The details are as follows, > > 1. Firstly installed the usb-2.6 tree What tree is that? A Red Hat internal tree? What kernel version is it based off of? Also, can you reproduce the problem with a vanilla 2.6.39-rc5 kernel? > 2. Then I attached the ExpressCard USB 3.0 to an ExpressCard slot in the laptop > 3. Then, attached the USB 2.0 mp3 device to the ExpressCard USB 3.0 host port. The system can find the USB 2.0 mp3 device successfully > 4. When I reboot the system, the mp3 can not be found. No matter I run #fdisk -l or #cat /proc/partitions . But if I attached the mp3 to the USB 2.0 port of the laptop, everything is absolutely normal. Did this ever work in a previous kernel? Can you reproduce it on older stable kernels? > 5. Next, I also tried to apply those 6 patches to the tree. But it also failed after applied those 6 patches. > http://marc.info/?l=linux-usb&m=130389890710401&w=2 > http://marc.info/?l=linux-usb&m=130389886810361&w=2 > http://marc.info/?l=linux-usb&m=130389890910407&w=2 > http://marc.info/?l=linux-usb&m=130389890910410&w=2 > http://marc.info/?l=linux-usb&m=130389890810404&w=2 > http://marc.info/?l=linux-usb&m=130389888710386&w=2 Can you please send dmesg with CONFIG_USB_XHCI_HCD_DEBUGGING and CONFIG_USB_DEBUG turned on? I need to see the log file for when you first plug in the mp3 player, and then the full log file for when you reboot. > 6. Then I verified there is also so such problem when attached the mp3 to a PCI-E USB 3 port rather than the USB 3 ExpressCard. Oh, interesting. Can you look in dmesg (after you turn on CONFIG_USB_XHCI_HCD_DEBUGGING) for a line like: NEC firmware version 30.21 Can you also send the lspci -vvv for the ExpressCard and PCIe host? > FYIïI have also replaced the usb 2.0 mp3 to an usb 2.0 disk. It can also work well. Do you mean that the USB 2.0 disk will show up after a reboot? So just the mp3 player is not working? > Hope these all the informations mentioned above would be useful for you. Please also send the lsusb -v for the mp3 player. Sarah Sharp -- 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
