-------- Original-Nachricht -------- > Datum: Mon, 12 Nov 2012 20:09:27 +0000 > Von: Pete Batard <p...@akeo.ie> > An: libusbx-devel@lists.sourceforge.net > Betreff: Re: [Libusbx-devel] Crashes
> 1. What is the exact version of libusbx you are using (should be > something like 1.0.14.10586)? 1.0.14.10586 > 2. On which platform? Windows XP. > 3. Have you tested only that platform, or are you seeing the problem on > other platforms? I'll tested it on Linux, too. But the version of libusbx might be a little older: 1.0.14.x > 4. Have you tried other HID keyboards or devices? Did they also produce > a crash, or was it just the Cherry one? I used a Logitech headphone, but nothing special happened. > 5. Does the app crash on exit or during the loop? Well, it crashes before libusb_exit(). > Now, I am seeing the following issue with your code on Windows when > running git latest, past the 32 mark: > > libusbx: error [set_hid_interface] program assertion failed: max USB > interfaces reached for HID device > > So I guess that, at least with regards to HID on Windows, there is > probably something that needs to be fixed (though the likelihood of > someone making 32 concurrent calls to get_device_list is fairly low, so, > while we definitely want to fix it ASAP, I wouldn't see it as high > priority). This is just a simple code for reproducing an error with PyUSB using libusbx as backend. Via PyUSB I check every 2 seconds, if a usb device has been attached or dettached on a specific usb hub. After 32 times, I get the error "No such device (it may have been disconnected)". The developer of PyUSB said, that it may has to do something with memory management in python. > I'm also having a massive déjà vu with regards to issuing a bunch of > get_device_list() in succession, to try to produce an error. I think we > fixed something there not so long ago, but I can't figure out when that > occurred. Pretty sure it was for libusbx, yet the thread where that > happened eludes me... Well, I'm using the latest libusx version... Best regards Stefano ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ libusbx-devel mailing list libusbx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libusbx-devel
