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Date:      Sat, 03 Feb 96 17:09:50 -0600
From:      swise@austin.ibm.com (Jean-Steveau Wise)
To:        Julian Elischer <julian@ref.tfs.com>
Cc:        swise@austin.ibm.com (Jean-Steveau Wise), freebsd-bugs@freebsd.org
Subject:   Re: ATAPI 4x cdrom hang 
Message-ID:  <9602032309.AA28383@vikings.austin.ibm.com>
In-Reply-To: (Your message of Fri, 02 Feb 96 22:40:08 PST.) <199602030640.WAA16915@ref.tfs.com> 

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julian@ref.tfs.com says:

| > 
| > 
| > 
| > Hello,
| > 
| > I've got a 133MHZ Intel system (Packard Bell) with a 4x IDE ATAPI
| > cdrom.  FreeBSD 2.1 finds the device and I can read from it (ls -sailR
| > will show everything on the cd mounted).  However, whenever I try to
| > transfer anything off it, the entire system hangs.  I'd be happy to get
| 
| can you describe 'hangs?'
| 
| can you still get into the kernel debugger?
| (have you got the kernel debugger in the kernel? (options KDB))

Ok, I've built in the debugger.  How do I invoke it?  I reproduced the
problem and it didn't hit the debugger, I perhaps the thing's stuck with
interrupts disabled??

| 
| if you can get into the KDB that gives us something to work with..
| does it still ping?
| does <ALT><F8> still beep (assuming you haven't got a login on screen 8..

<ALT><F8> doesn't beep...

Unfortunately, the last time I hung it the root fs got trashed, so I've 
spent some time rebuilding things...

Now I'm back up so I'll continue debugging...

BTW:  It also hangs if I run xcd and play music on the cdrom.  Within 
30 seconds of starting, the system hangs, although the music is still 
coming through the speakers!



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