Hi, I have a few STBs (Intel Atom CE41xx) each equipped with a Netgear WNA1100 USB dongle. The dongle is running in AP mode using ath9k_htc from compat-wireless 3.3.2-n. On some of these STBs, I get recurring "USB disconnect/new usb device" cycles on the port to which the dongle is connected, even though the STB is *not* physically touched: hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0002 ehci_hcd 0000:01:0d.0: GetStatus port:1 status c00100a 6 ACK POWER sig=se0 PEC CSC hub 1-0:1.0: port 1, status 0100, change 0003, 12 Mb/s usb 1-1: USB disconnect, device number 2 Then kernel logs lots of ehci_hcd messages like this: ehci_hcd 0000:01:0d.0: detected XactErr len 0/64 retry 1 ehci_hcd 0000:01:0d.0: detected XactErr len 0/16384 retry 1 and eventually the dongle gets recognized again, until the "disconnect/recognized again" cycle happens again (usually it's a matter of seconds or minutes between each cycle). A particularly annoying consequence is that after one or more of these cycles (most often 2 or 3), I get into this situation: ath9k_htc 1-1:1.0: ath9k_htc: Target is unresponsive Failed to initialize the device ath9k_htc: probe of 1-1:1.0 failed with error -22 drivers/usb/core/inode.c: creating file '004' hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0002 And only a hard reboot or plugging out / plugging in the dongle can get the dongle back to a usable state. This is exactly like what is described in this thread: http://comments.gmane.org/gmane.linux.kernel.wireless.general/87802 (FWIW, I also have the exact same behaviour as what is described in that post of this same thread: http://permalink.gmane.org/gmane.linux.kernel.wireless.general/87865; I am also working around this by bringing up the interface as soon as the modules are loaded. Now what I am wondering (before further investigating) is if ath9k_htc (or the device's firmware) is only receiving this USB disconnect event or if in any way if could have been what triggers it. I have not seen yet any other device than the wifi dongle showing this issue on the same STBs. Any clues? Thanks, Loris Linux 2.6.39 #1 SMP PREEMPT i686 GNU/Linux usb 1-1: New USB device found, idVendor=0846, idProduct=9030 usb 1-1: New USB device strings: Mfr=16, Product=32, SerialNumber=48 usb 1-1: Product: WNA1100 usb 1-1: Manufacturer: NETGEAR WNA usb 1-1: SerialNumber: 12345 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
