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Date:      Sat, 5 Dec 1998 13:47:34 +0000
From:      Nicolas Souchu <nsouch@teaser.fr>
To:        Mike Smith <mike@smith.net.au>
Cc:        Amancio Hasty <hasty@rah.star-gate.com>, current@FreeBSD.ORG
Subject:   Re: nlpt and severe system slow down
Message-ID:  <19981205134734.08174@breizh.prism.uvsq.fr>
In-Reply-To: <199812032243.OAA00335@dingo.cdrom.com>; from Mike Smith on Thu, Dec 03, 1998 at 02:43:04PM -0800
References:  <199812031346.FAA22883@rah.star-gate.com> <199812032243.OAA00335@dingo.cdrom.com>

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On Thu, Dec 03, 1998 at 02:43:04PM -0800, Mike Smith wrote:
>
>> This is my config for nlpt:
>> 
>> controller      ppbus0
>> controller      ppc0    at isa?  irq 7 vector ppcintr
>> device          nlpt0   at ppbus?       
>> 
>> 
>> If I shutdown my laser jet 4mp while printing, my system comes to crawl for 
>> instance my mouse and keyboard don't respond. The system is not quite dead
>> because I can see that the cursor moves or rather jumps sporadically
>> on my X desktop
>> 
>> Has anyone else seeng this behavior?
>
>Yes; it's better than the old 'lpt' driver which would freeze your 
>system until you turned the printer back on.

Mike, you seem to understand this well, I do not :)

I'll have to if I want to make ppbus drivers run all together.
So I hope Bruce is reading this mail too... I know we discussed about it, I
have the mails here.

So, is there any tutorial about how spls are working? Or which are the
related files in the tree?

>
>Nicolas should probably look at this one...
>

Why does the system freeze like this? Is it permanently interrupted by an
incorrect parallel port line level?

BTW, what's the interrupt 'level' (I should say 'set' maybe) of
dev_null drivers which are not said tty, bio or net in the MACHINE file?

>-- 
>\\  Sometimes you're ahead,       \\  Mike Smith
>\\  sometimes you're behind.      \\  mike@smith.net.au
>\\  The race is long, and in the  \\  msmith@freebsd.org
>\\  end it's only with yourself.  \\  msmith@cdrom.com
>
>
>
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-- 
nsouch@teaser.fr / nsouch@freebsd.org
FreeBSD - Turning PCs into workstations - http://www.FreeBSD.org

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