1. U disk should be good , because it works with my driver together for most
time, but sometimes it lost from linux OS , result in
libusb_interrupt_or_bulk_transfer.
I doubt that libusb init and proccessing mode of
libusb_interrupt_or_bulk_transfer.
thanks !
发件人： Xiaofan Chen
发送时间： 2012-05-02 14:49
收件人： fushuaibing
抄送： libusbx-devel
主题： Re: Re: [Libusbx-devel] issue: libusb_interrupt_or_bulk_transfer result in
device disappear
On Wed, May 2, 2012 at 2:40 PM, 付帅兵 <fushuaib...@centerm.com.cn> wrote:
> 1.The Linux distro is ubuntu9.10 and the kernel is 2.6.24.
> 2.the kernel is not debug , so the relevant output of "dmesg" is only "usb
> 1-6: USB disconnect, address 13".
So the device got kicked out by the kernel and most likely
the device is buggy.
> 3. for Most of U disk the user mode driver is ok, but for a few U disk
> which is made by Unknow manufacturer, it is not ok.
So they are buggy and you can not do anything about it.
> libusb_interrupt_or_bulk_transfer return ERROR and it got lost on
> the bus . I am very confused
This is because the device is kicked out by the kernel, so it has
nothing to do with libusb.
On the other hand, you can try the latest Ubuntu (12.04
was just released) and see if that helps a bit.
--
Xiaofan
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