It'se me (Carlo Scarfoglio, [EMAIL PROTECTED]) who reported the problem with a
serial dongle that did not communicate with the protected app after kernel
2.1.132.
Now I am running kernel 2.3.36 SMP , Suse 6.1 standard on a dual Celeron Abit
BP6 mobo. The serial dongle is connected to /dev/ttyS3 on an ISA multiport card.
I ran the app through strace on K 2.3.36 and after a write to the serial port
the result was an endless series of read(4, 0x.......,84) that failed wit error
-1. From time to time some characters are returned, but the app probably does
not receive enough data to perform its check. Interestingly, when run under
strace, the app finds and checks OK the dongle, it won't when run alone (no
strace).
But yesterday I found that I can fix the problem by setting "low_latency" to the
port with setserial. This seems to be the cure so far.
Of course, had I received support from the software supplier, I would not have
needed to request help on this mailing list. But they pulled a good excuse:
Linux kernel are changing rapidly and they can't keep up.
If this case can be of any interest to developers, I will perform the tests
suggested by Ted.
Cheers
Carlo Scarfoglio
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