Kernel does not support read-back from parallel port. You need to recompile the kernel with an option to avoid this problem. Without recompiling, this problem always occurs if your kernel version is 2.0 or later. Here is the option that should be specified.

?”Category” -> “option name”

In case of kernel2.2.,
”Character devices” -> “Support IEEE1284 status readback”

In case of kernel2.4.,
”Parallel port support” -> “IEEE1284 transfer modes”

Article: KB020169 Language: English Product Range: Dot Matrix

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