Date: Fri, 03 Apr 1998 09:42:14 -0100 From: Malte Lance <malte@webmore.com> To: "Bryan K. Ogawa" <bkogawa@primenet.com> Cc: questions@FreeBSD.ORG Subject: Re: Advice for diagnosing X hangs / kernel hangs? Message-ID: <3.0.32.19980403094213.006d37ac@cyclone.degnet.baynet.de>
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At 13:42 02.04.98 -0800, you wrote: >On Mon, 30 Mar 1998, Malte Lance wrote: > >> At 23:22 29.03.98 -0800, you wrote: >> >On Tue, 24 Mar 1998, Bryan K. Ogawa wrote: >> >> I'm looking for advice on how to diagnose the causes of hangs (no >> >> keyboard, no mouse, music which was playing stops, no disk activity) that >> >> happen to me occassionally under X. >> >Odd. >> >> Are you running a SCSI-system with many devices on the SCSI-bus ? > >Yes. I have 2 connected SCSI cards (AHA2940UW and BT948), 1 with 4 >devices (2 HD, tape drive, CDROM), 1 with 1 device (scanner). > >Does this shed any light on things? Maybe ... i encounter similar problems where my machine suddenly freezes (no log, no error, no nothing ... just sudden-death). I noticed it must be something with the scsi-system (while listening to the old good 'Ludwig van' ;) I changed the terminating device from CDROM to the tape-drive (SONY SDT-7000). Then this freezes did not happen as often as they did when the CDROM was terminating my scsi-bus. I suspect TERM-POWER is causing this trouble but i am not sure. I have played with the term-power config a little: 1. no term-power (same as no active terminator) [bad idea] 2. term-power connected just to the terminator, not the scsi-bus [good idea] 3. term-power connected to the terminator AND the scsi-bus [not so good] Best results gave nr. 2. so far (waiting for the next freeze with this config). My freezes always occur on heavy concurrent diskaccess. My scsi-system: controller, 3 scsi-disks, cdrom, tape, zip. It is not an OS-specific problem since this shit also happens with Win-95. On the next freeze i will take a disk as terminating device. If this will not solve my problems, i will order a new scsi-controller and forget about my adaptec-2940. Maybe you want to play with your scsi-bus-termination. Let me know about your results. Malte Lance malte@webmore.com > >bryan k ogawa <bkogawa@primenet.com> http://www.primenet.com/~bkogawa/ > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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