On Tue, 13 Jul 2010, Leandro Melo de Sales wrote: > Hi list, > since I updated to some of new linux kernels versions, I started > to experimenting many problems with my usb devices / hub, which makes > my computer works in a very strange manner. Researching on this > direction on the web, I noticed that many people have the same/similar > problem as mine, where always linux kernel kprints the following > message to the dmesg output using this template: usb X-X: device not > accepting address XX, error -XXX. If you return to the older kernel version, do the problems go away? > Are kernel developers, mainly the usb team, aware of this problem? There's a usb team?? Where do I sign up to join?! :-) More seriously... No, of course not -- how could anybody be aware of your problem before you tell us? > What should I have to do to find a solution for my case? This is > happening with my laptop. I need to know if this could be a hardware > problem, because my laptop is still under guarantee and if it is a > hardware problem, I will contact the seller. > Please, any suggestion/tip will be greatfully accepted. Thank you! If you test several USB devices, and they all work on different computers but fail on your laptop, then probably there's something wrong with the laptop. > Kernel version: > # uname -a > Linux leandro-laptop 2.6.32-23-generic #37-Ubuntu SMP Fri Jun 11 > 08:03:28 UTC 2010 x86_64 GNU/Linux > > Example of dmes output: > > [ 2029.790225] usb 7-1: new full speed USB device using uhci_hcd and address 10 > [ 2044.910100] usb 7-1: device descriptor read/64, error -110 > [ 2060.140082] usb 7-1: device descriptor read/64, error -110 > [ 2060.370101] usb 7-1: new full speed USB device using uhci_hcd and address 11 > [ 2075.492621] usb 7-1: device descriptor read/64, error -110 > [ 2090.720082] usb 7-1: device descriptor read/64, error -110 > [ 2090.950089] usb 7-1: new full speed USB device using uhci_hcd and address 12 > [ 2101.370344] usb 7-1: device not accepting address 12, error -110 > [ 2101.490132] usb 7-1: new full speed USB device using uhci_hcd and address 13 > [ 2111.910085] usb 7-1: device not accepting address 13, error -110 > [ 2111.910123] hub 7-0:1.0: unable to enumerate USB device on port 1 > [ 2112.034915] usb 7-2: new full speed USB device using uhci_hcd and address 14 > [ 2127.150161] usb 7-2: device descriptor read/64, error -110 > [ 2142.380160] usb 7-2: device descriptor read/64, error -110 > [ 2142.610230] usb 7-2: new full speed USB device using uhci_hcd and address 15 > [ 2157.730188] usb 7-2: device descriptor read/64, error -110 It's possible that this is caused by bad interrupt routing. What shows up in /proc/interrupts? You could try booting with "acpi=off" or "pci=noacpi" on the boot command line. Or you could try using a 32-bit kernel instead of a 64-bit kernel. Alan Stern -- 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
