Re: 2.6.25 upgraded to 2.6.36: serial app stops working

[folkert <folkert@vanheusden.com>]

> > I upgraded my linux system to 2.6.36. Now suddenly my serial driver for
> > my MSF receiver stopped working. Two things I noticed: I need to open
> > the serial device (/dev/ttyS0, a regular uart, see below) with O_NDELAY
> > for open() to return at all. Then something funny happens: I read bytes
> > from the device (at 50bps) which runs fine for a while but then suddenly
> > I get a burst of '0x00' bytes - precisely at the point at which the MSF
> > radio device sends a timecode! So I think the device fiddles with one of
> > the pins of the serial port confusing the linux serial driver. This
> > worked fine upto and including 2.6.25 (maybe later too) but with 2.6.36
> > this fails.
> > Anyone an idea what might go wrong here? And how to fix it?
> 
> Any chance you could use 'git bisect' on the kernel tree to see what
> caused the change?  Moving from .25 to .36 is a huge jump, many many
> years of development and loads of things have changed so we need some
> help to narrow the problem down.

Hmmm, I might have missed this message :-)
Anyway a few months ago I retried it and had same problem. BUT: the
other receiver I have, has a serial-to-usb converter in it. So it is an
USB device but maybe a special one? Anyway: it has exact the same
problem. It is possible that maybe they're just broken both.
As you may deduct from my replying-delay, it has no great priority for
me.


Folkert van Heusden

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