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Forum: Embedded Applications

08-10-2016, 11:31 PM

Replies: 4

udl module, essential? comes from where?

Views: 14,149

Posted By Jim2220

Displaylink as CD reappears after error, might not be cause of error

I believe that the Displaylink CD Drive reconnection occurs AFTER my program
- successfully connects to the 700TSU / Displaylink
- successfully outputs 3 (of 6) small rectangles to the screen
-...

Forum: Embedded Applications

08-06-2016, 05:44 PM

Replies: 4

udl module, essential? comes from where?

Views: 14,149

Posted By Jim2220

IOCTL_USB_DISCONNECT, right or wrong track?

A call to this function of libusb in linux.c

int usb_detach_kernel_driver_np(usb_dev_handle *dev, int interface)
{
struct usb_ioctl command;
int ret;

command.ifno = interface;
...

Forum: Embedded Applications

08-05-2016, 11:18 PM

Replies: 4

udl module, essential? comes from where?

Views: 14,149

Posted By Jim2220

Perhaps udl is not needed?

If I use
sudo modprobe -r udl
my application still runs and can maintain output to the Xenarc after one second ("Displaylink CD" not present and no Mint hotplug sounds).

Does this mean that udl...

Forum: Embedded Applications

08-05-2016, 10:38 PM

Replies: 4

udl module, essential? comes from where?

Views: 14,149

Posted By Jim2220

udl is in the Xenarc

Another clue:
If I boot my desktop PC without the Xenarc then do
lsmod | grep udl
nothing (i.e. no udl module) is there.
sudo modprobe udl
lsmod | grep udl
still nothing is there.

Repeating...

Forum: Embedded Applications

08-05-2016, 05:11 PM

Replies: 4

udl module, essential? comes from where?

Views: 14,149

Posted By Jim2220

udl module, essential? comes from where?

I have written a program to output to a Xenarc 700TSU which contains a Displaylink. My program uses libdlo which uses libusb 1.0.20. After booting Linux Mint 17.2 and starting my application Mint...

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