Hi there, I'm trying to finish the new NUT [1] driver for USB/HID UPSs, based on libusb, but I'm facing a last problem: I frequently (seems more with latest kernels / libusb) device disconnexion upon power failure! I got the message: "hub <path>: port X disabled by hub (EMI?) re-enabling..."
And all my attempts to reconnect it (through init() / find_busses() and find_devices(), with various method, hubs, ... ) fails with EPERM and the like (can't get connect info / operation not permitted), although the device is visible / ok. If I relaunch manually newhidups, all works fine. But that lower the high availability principle with UPSs ;-) I'm not sure wether it's a kernel or libusb (or hardware) issue! If nothing is using the device, power failure doesn't generate a disconnexion! newhidups source is available there : http://cvs.alioth.debian.org/cgi-bin/cvsweb.cgi/nut/?cvsroot=nut the interesting files are (the first one most of all): drivers/libusb.c (libusb_open(), called again upon disconnexion) drivers/newhidups.c drivers/libhid.c I'm currently running this on: - Debian Sid - kernel 2.6.11 (-2 deb) - libusb 0.1.10a (-8 deb) Also tested on: - Mandrakelinux 10.1 - kernel 2.6.8 - libusb 0.1.8 Any help welcomed, Arnaud --- Linux / Unix Expert - MGE UPS SYSTEMS - R&D Dpt OpenSource Developer - http://arnaud.quette.free.fr/ Debian Developer - http://people.debian.org/~aquette/ ... and much more ... --- [1] Network UPS Tools : http://eu1.networkupstools.org ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
