Sensoray 2253 Linux - Manual (Page 7)

Troubleshooting
If the driver fails to load, or if after loading the driver, there are no video
device nodes created, this may indicate a kernel compatibility problem in the
driver. Please send the output from “uname -r” and “dmesg” with the name
and version number of the Linux distribution to [email protected]. If
you have a custom built kernel, please also provide the kernel configuration
file.
The driver file is a kernel module that resides in
/lib/modules/`uname -r`/extra/s2253.ko.
If this file is missing, which can happen if your Linux kernel is updated, please
reinstall the driver, starting at Step 4 in the setup instructions. If you have the
“lsusb” program installed, you can see if the device firmware was loaded.
When Model 2253 is plugged in, it initially has the USB device id 1943:a253
and the red LED (D1) on the 2253TA board is not lit. The driver loads the
firmware file on the 2253 from /lib/firmware/s2253.fw. If this file is
missing, please reinstall the driver, Step 4 in the setup instructions. When the
2253 firmware is loaded, the USB device id should change to 1943:2253 and
the red LED on 2253TA board should be lit.
If the LED fails to light and the lsusb device id 1942:a253 indicates the
firmware hasn't loaded, change to the driver directory “cd driver” and do
“sudo make unload” and “sudo make load”. This will reload the driver with
some debug messages enabled, and “dmesg” should provide some extra
detail about the problem.
The red LED on the 2253TA board will also indicate the status of the
composite video input signal. The LED will blink when the signal is absent or
doesn't match the requested video standard parameter. The LED blinking
feature can be controlled by using a v4l2 control (see API.)
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