On Fri, 25 Nov 2011, Johann Klammer wrote: > When using a DVB-T Dongle and an external HDD simultaneously, EHCI > almost always disconnects. > > When tuning, it works for some time, but after a while, probably > triggered by disk activity > the dmesg log fills up with disk errors and failed i2c writes. The > devices disconnect and the mountpoint gets lost. > Attempting a simple 'ls /mnt/rec' fails with 'input/ouput error'. The > kernel log sometimes reports > the khubd task hanging. As soon as the dvb software gets shut down(at > that point DVB doesn't work either), > the devices get rediscovered as low speed devices and work again after > umount/mount and restart of software. > But it's rather slow from there on. This is probably a low-level hardware error. Interference between the two ports of some kind. > usbdump.mon: On request. usbmon output for the whole host controller > during the event. I can mail this, but it's rather large and the mailing > list won't accept the message. Can you put the usbmon trace on a web server like pastebin.com? 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
