2009/5/15 halfmanhalfbug > I have this exact problem with a particular SATA external hard-drive using > kernel 2.6.24 (Hardy) and 2.6.27 (Jaunty). My observation is that plugging > in the device with only one USB connection results in the problem (infinite > resets) but plugging in the device with 2 connections (1 data+power and 1 > power only) results in correct polling and mounting. > I am wondering if the USB 2.0 driver is supposed to sense and allocate > power (or more precisely current)? Incorrect powering would explain why the > problem is only seen with certain hardware combinations and is especially > seen with USB hubs, which split power. >
this is not software related, but hardware related here. these kind of external devs need more power than a single USB connection can provide. I've personnaly an external cdrom drive like that. an "idiot proof" is to run the same dev on another platform. result guaranteed ;-) Arnaud -- ehci_hcd module causes I/O errors in USB 2.0 devices https://bugs.launchpad.net/bugs/88746 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
