[cups.general] cups hanging when initializing backend

[Hatto von Hatzfeld]

Hatto von Hatzfeld wrote:

>>>> On Oct 27 05:44 Hatto von Hatzfeld wrote (shortened):
>>>>> My cups server quite often (not always) fails to initialize the
>>>>> printer connected to /dev/lp0 ("Backend did not respond within 30
>>>>> seconds!").
>>>> ...
>>>>> DeviceURI parallel:/dev/lp0
>>>> ...
>>>>> OS: SuSE 9.2

[...]

> What is wrong?

In order to help others I want to tell my solution:

At first doing a

~> pstree | grep cups

I got to see:

     ??cupsd???cupsd???serial

which means that the probe on the serial port was hanging (and not the
parallel port as I assumed) - and it never stopped hanging until shutdown,
so cups did not even start its normal work. This happened with my cups 1.1,
while I have been told that this issue has been changed in 1.2.

My simple solution for cups 1.1 is to disable the serial backend (which I do
not need), doing a

~> chmod a-x /usr/lib/cups/backend/serial

I hope that this does not have any side effects...

Ciao,
Hatto

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