> >Please look up the bConfigurationValue for your device > >in sysfs. I didn't explicitly say that this was done under kernel-4.7.4, otherwise it may have been impossible under 4.8 . On Thu, Sep 22, 2016 at 04:40:50PM +0200, Oliver Neukum wrote: > > OK. Strange. Please do > > dmesg -c > echo 9 > /proc/sysrq-trigger > modprobe cdc_acm > echo "module cdc_acm +mpf" > /sys/kernel/debug/dynamic_debug/control > > [plug your device in] > > and provide the full output of dmesg after that. You don't state if this must be done in a safe 4.7.4 or a crashable 4.8. (if I get that far to retrieve dmesg to a file). Anyway, echo "module cdc_acm +mpf" > /sys/kernel/debug/dynamic_debug/control results in 'No such file or directory' because there is no 'dynamic_debug'. The kernel option DYNAMIC_DEBUG was not set. A new kernel is compiling now.. Groeten, Wim. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
