I am using a cheap serial board (without FIFO) to drive a modem at
19.2k baud. Board and driver worked quite well with a 21. Feb (just some
silo overflows from time to time). Since i upgraded to the 31. May
kernel the com port looks up every ~10 minutes during protocol transfer
(term/Kermit). The tty state (pstat -t) in this cases is OCBA 
which means that the driver is waiting for the next tx-ready interrupt 
(at least as far as i understand the tty/com code). Since the UART
status register shows already the tx-ready bit the driver has probably
missed the last interrupt and waits forever. 
If i check this bit in the driver and call comstart accordingly the
lockup disappears but the transfered byte still seems to be lost.
Is there a REAL fix for this problem or  somebody else working on this?


           Dirk Duellmann

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Dirk Duellmann, DESY (-FH1T-), Notkestr. 85, 22603 Hamburg, Germany
phone: +49-40-8998-3461
fax:   +49-40-8994-4385
e-mail:  <dirk@dice2.desy.de>,<duellmann@vax58b@desy.de>,
         <f33due@dhhdesy3.bitnet>
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CAUTION: All connected CMZ files are now released!






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