Hi Hans, Hans de Goede wrote: > Hi, > > On 12/19/2013 10:51 AM, Erik Rull wrote: >> Hi all, >> >> I read already some threads here in the list about the "hot disconnect" and >> the issues that happen. >> >> I'm using the libusbx 1.0.17 and encounter the following stacktrace when >> removing a usb device during a transfer - the timeout is set to 50 (msec) >> >> /lib/libusb-1.0.so.0 [0xb7037f94] >> /lib/libusb-1.0.so.0 [0xb7037ea2] >> /lib/libusb-1.0.so.0:libusb_handle_events_completed() >> /lib/libusb-1.0.so.0:libusb_handle_events_timeout_completed() >> /lib/libusb-1.0.so.0 [0xb7036caa] >> /lib/libusb-1.0.so.0 [0xb703b27a] >> /lib/libc.so.6:ioctl() >> >> this stays for several seconds until I send a SEGV to the process: >> >> /lib/libusb-1.0.so.0 [0xb7037f94] >> /lib/libusb-1.0.so.0 [0xb7037ea2] >> /lib/libusb-1.0.so.0:libusb_handle_events_completed() >> /lib/libusb-1.0.so.0:libusb_handle_events_timeout_completed() >> /lib/libusb-1.0.so.0 [0xb7036caa] >> /lib/libusb-1.0.so.0 [0xb703b27a] >> /lib/libusb-1.0.so.0 [0xb7038ab6] >> /lib/libusb-1.0.so.0 [0xb7031fe0] >> /lib/libusb-1.0.so.0 [0xb7031c9c] >> >> That's it. Additonally I had a SEGV also when removing the USB device, but >> I wasn't able to catch the stack there, sorry. >> >> I know that the handling of the real disconnect may have several failing >> transfers before the disconnect is actually reported. >> But are there possibilities to prevent the process to stall or to SEGV? >> >> Maybe there is an easy workaround for that? > > I'm afraid that with the above info we cannot help you further, > because it is incomplete, can you please: > > 1) do export LIBUSB_DEBUG=4 on a terminal, and start your app from that > some terminal, this should produce a wealth of debugging messages, > please collect them all > > 2) Make sure you build libusb with debuginfo, and next time you post traces > make sure they include symbolic names for all involved addresses > > Thanks & Regards, > > Hans
Thanks for the hints on how to get more information. I will send the output as soon as I got it running again. Best regards, Erik ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ libusbx-devel mailing list libusbx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libusbx-devel
