linux-kernel - Re: system freeze on cdrom failure

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Date:	Wed, 2 Aug 2006 21:10:23 -0700
From:	"Randy.Dunlap" <rdunlap@...otime.net>
To:	Kyle Davenport <kdavenpo@...cast.net>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: system freeze on cdrom failure

On Wed, 02 Aug 2006 23:01:41 -0500 Kyle Davenport wrote:

> I posted on this before, and I'm confirming that the problem is still 
> happening at 2.6.17.5.    Problem started with 2.6.15*.   Saw it again 
> in 2.6.16.  If I reboot into 2.6.13, I still see some cdrom and/or scsi 
> errors, but the system does not freeze.  This was from running grip on a 
> music cd.  It also happens just reading most burned cd's or dvd's.  
> 
> Aug  1 23:23:00 quickest kernel: cdrom: dropping to single frame dma
> Aug  1 23:23:02 quickest kernel: BUG: unable to handle kernel NULL 
> pointer dereference at virtual address 0000000c
> 
> Problem drive is Toshiba DVD-ROM SD-M1401 (scsi).  I do not see any 
> errors with the same media in a Yamaha CRW2100S (scsi burner).
> 
> Tyan Thunder K7X-Pro (S2469UNG)/ 2x2400 Athlon MP/ 1GB ram / 1TB disk / 
> gcc 3.2
> 
> This is easily repeatable - please ask for more info!

more info, please.
Like a full backtrace.  And can you test 2.6.18-rc3 also?


---
~Randy
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