Date: Sun, 2 Mar 1997 17:54:55 -0500 (EST) From: Drew Derbyshire <ahd@kew.com> To: questions@freebsd.org Subject: serial port console performance issues Message-ID: <199703022254.RAA00722@athena.hh.kew.com>
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On a ISA based 386/33DX machine I just brought up with 2.2-GAMMA (2/25/97 edition), bizarre stuff is happening with the serial console (COM1/sio0) During boot, it initially works fine, and then just about when syslog starts (the first or second message after the dmesg buffer ends), output runs VERY slowly, like one character per second. Attempts to type at the terminal when the boot messages do finish (minutes later) usually result in a silo overflow. I am also seeing reports of 'stray IRQ 7', which continue even after disabling the LPT port, and pulling three of the five cards in the unit (leaving only two modems and the two on-board serial ports, all of which response to their properly configured IRQs) The port runs slowly until shutdown, the final messages (syncing disk) resumes a normal 9600 baud pace. Suggestions? I'm tempted to put in a PR on it ... -ahd-
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