Messages in this thread | | | Date | Mon, 8 Sep 2003 08:28:25 -0700 (PDT) | Subject | Re: USB error numbers | From | "Randy.Dunlap" <> |
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> Where do the various numbers come from in messages such as > USB device not accepting new address=5 (error=-110), and what do they > "mean"? > I'm trying to work out why this happens when I plug in one of several > webcams (into any of several computers) and one webcam occasionally. -
Hm, the USB error numbers are listed/documented in linux/Documentation/usb/error-codes.txt (by name).
Look in include/<asm-arch>/errno.h to match names to values (or include/asm-generic/errno.h).
-110 for x86 is -ETIMEDOUT (USB returns negative error numbers). It can mean that the device just wasn't responding, or it can mean that there is a problem with USB interrupt routing. There is lots of work going on in this area right now, especially related to ACPI interrupt routing.
~Randy
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