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Date:      Thu, 10 Apr 1997 18:14:42 -0700 (PDT)
From:      Doug White <dwhite@gdi.uoregon.edu>
To:        Harry Reed <doon@eeyore.lv-hrc.nevada.edu>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Help with 2.2.1-Release crashes
Message-ID:  <Pine.BSF.3.96.970410181339.7002C-100000@localhost>
In-Reply-To: <199704101849.LAA13336@eeyore.lv-hrc.nevada.edu>

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On Thu, 10 Apr 1997, Harry Reed wrote:

> 	Top Data 5x86-120 w/32 MB RAM
> 	Adaptec 2842 VLB SCSI controller
> 	1 Fujitsu M2364(?) 1GB SCSI disk
> 	1 Micropolis 2110? 1GB SCSI disk
> 	Archive Viper 250-MB SCSI tape drive
> 	Diamond Stealth 64 VLB S3 video card
> 	US Robotics intenal modem
> 	Logitec Busmouse

Check..

> Under FreeBSD 2.1.0, 2.1.5 (w/XF86 3.1.2) absolutely no problems. Entire
> machine worked perfectly. Would stay up for weeks on end.
> 
> Installed (upgraded to) 2.2.1-Release (w/XF86 3..2) without any problems.
> Recompiled kernel with my old configuration file without any problems.
> Re-booted machine, again, no problems.
> 
> Started doing things. No problem for 2 or so hours. Then while
> doing multiple compiles the system hung. No warning, no console error
> messages, just hung. Mouse wouldn't respond, ctrl-backspace did
> nothing, ctrl-alt-del did nothing. System completely dead. Did a reset.
> Rebooted w/o problem. Same thing, after a few minutes of light/medium 
> SCSI activity the machine would crash. Upgraded to 2.2-970401-RELENG
> same problem. If I let the machine run with minimal SCSI activity (i.e.
> running Xlock) the machine will stay up for days w/o incident. When I go
> anduse the disks then the crashes occur. 

Try setting the flag 0x1 on npx0.  This disables an operation that causes
some machines to lock up.

Doug White                              | University of Oregon  
Internet:  dwhite@resnet.uoregon.edu    | Residence Networking Assistant
http://gladstone.uoregon.edu/~dwhite    | Computer Science Major




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