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16550A

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Subject: 16550A
Date: Sunday, August 23, 1992 - 12:31 pm

Does anyone else have problems with Linux not correctly "shutting down"
the 16550?  Ever since the kernel has supported a 16550, I have had to
hard reset the computer after running linux, or it seems that the
computer "forgets" that the port that contains the 16550, exists.  When I
soft reboot from linux (after doing a shutdown), the CMOS screen shows
one less serial port (in my case, None), and programs such as OS/2
refuse to install the COM drivers because they don't see the serial
port.  (I have no term program running under Linux at the time)

I had this problem with beta versions OS/2 early on where it would
exhibit the same behavior (and still will if I reboot OS/2 while
running a term program), but a normal shutdown (in the final release of
OS/2) "correctly closes" the port (ie. the computer is aware of the
ports existence when the CMOS screen comes up).

Is there code that needs to be added to Shutdown that would relinquish
control of the port?
Thanks..
-- 
Rob Coleman ][ gt0449a@prism.gatech.edu        ][  "I think I'm going bald!"
Comp. Sci.  ][ Georgia Institute of Technology ][        -Rush/COS
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16550A, Rob Coleman, (Sun Aug 23, 12:31 pm)
speck-geostationary