Messages in this thread | | | Date | Sun, 22 Nov 1998 23:51:38 -0600 (CST) | From | Bibek Sahu <> | Subject | VIOLENT 2.1.129 serial bug on Alpha. |
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Violent as in when it hits, it takes out everything down to Init, and the only way out is to hit the reset button.
Steps that I think it followed:
1.) Compile serial as a module, let kmod handle it. 2.) Disconnect everything from ttyS0. 3.) Run getty on /dev/ttyS0 (in /etc/inittab) 4.) Open /dev/ttyS0 with something, say minicom. 5.) Try to remove unused modules (e.g., rmmod -a) 6.) Try to start / stop any program. 7.) Crash. HARD!
On my machine, 'rmmod -a; rmmod -a' is run automatically every 5 minutes by cron. I have a dumb terminal (vt240) for the serial port, but it's currently disconnected. There is a UPS tied to ttyS1.
Serial was loaded automatically at boot because of mingetty (or was that just getty? The machine's downstairs; I can't verify right now). I started minicom on the wrong port the first time, accidentally. I exited mincom. Everything looked ok. The module attempted to unload, and spit out a warning because it failed to unregister stuff. I tried to log in on another VC. I got several kernel Oopses after hitting 'enter' and couldn't even switch VCs anymore. The last Oops listed was with 'init'.
I'll try to get a trace tomorrow, unless someone beats me to it.
Machine is a Microway Screamer SX: DEC Alpha 21164PC, 533MHz 64MB RAM 4GB HD, IDE
Any / all other details available upon request. I'll see about doing a trace tomorrow.
Thanks! Good Luck! Happy Hunting! Happy Thanksgiving! :-) - Bob
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