On Mon, 23 Oct 2006, Marcello Botrugno wrote: > Hi all, > I am not sure this is the the right place for my question ... but this > is the problem. > I have an application for printing labels on CD/DVD discs. For this task > I use a device composed by a mechanical arm for getting discs from a bin > and putting it in an inkjet printer (the device has a CD writer too). > The CD Writer and the Arm-printer) are independent devices and are > connected to an USB hub. > The Arm device is a Class Printer device and I send it commands using > usb_bulk_write() and read its status using usb_bulk_read(). > My application works fine on FC2 with the kernel 2.6.10-1.771 (the last > available for FC2) but I need to move to FC5 (kernel 2.6.18-1-2200) for > best support of SATA discs. I have recompiled the application on FC5 but > when I arrive at the point where I send the data for printing, the > device stalls and all successive calls to usb_bulk_write() fail with > -110 and some time -2. > I already had this problem in the past, but with kernel 2.6.10-1.771 it > seemed resolved, now it reappears again. I should like to solve this > problem but I don't know if the problem is in libusb, in the kernel or > in the device. I suppose in the kernel because installing kernel > 2.6.10-1.771 on the same workstation and using the same device it works. > > Could you give me any suggestion ? > Do you think it is possible to use the usbcore of kernel 2.6.10-1.771 in > kernel 2.6.18-1-2200 or I should get some log message and submit to this > mailing list ? In this case can you tell me the best way for getting > this logs ?
You can try using the usbmon facility to check the communication between the computer and the device. Instructions are in the kernel source file Documentation/usb/usbmon.txt. Alan Stern ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
