Re: DVD/CD reading issues with -CURRENT from 2004-06-27

> From: Justin Hibbits <jrh29_at_po.cwru.edu>
> Date: Sat, 10 Jul 2004 20:05:15 -0400
> Sender: owner-freebsd-current_at_freebsd.org
> 
> Hi,
> 
> I updated to -CURRENT a couple weeks ago, for various reasons, from 
> 5.2.1, but now DVD and CD reading is flaking out.  When trying to play 
> DVDs with mplayer, they stop after a random amount of time, probably 
> after reading a complete buffer.  With 'dd', trying to create iso 
> images of CDs, it stops after a random amount of data is copied.  
> Attached is the backtrace of a 'dd' run.
> 
> Specs of the system:
> 
> 5.2-CURRENT as of 2004-06-27
> Athlon XP 1800+
> ASUS A7V266-E/A motherboard (VIA KT-266 chipset)
> 
> The 2 drives I tested are:
> iomega Zip-CD CD-RW drive (acd0)
> Toshiba DVD-ROM (acd1)
> 
> Any more info required, just ask.
> 
> Additional, I'm not on the list, so if you could CC me, that'd be 
> great, otherwise, I'll just check the archives.

I reported this a couple of weeks ago. I had not used the drive heavily
for a while, so I don't know exactly when the problem started. I have
discovered that accessing the drive again (another mplayer) will release
the drive. I suspect that an interrupt may be getting lost, but I'm far
from sure.

Next time it freezes, try using another program to tickle the drive and
see if it frees up.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman_at_es.net			Phone: +1 510 486-8634