Re: mounting CD-ROM hangs/freezes entire system

[http://dummy.us.eu.org/robert (Robert)]

 > From: Rob Mahurin <http://www.mad.scientist.com/~robm>
 > Date: Mon, 16 Apr 2001 10:03:58 -0400
 >
 > On Sun, Apr 15, 2001 at 06:23:44PM -0000, Robert wrote:
 > > When I
 > > % mount /cdrom
 > > the entire system hangs/freezes/crashes and I have to hit the reset button
 > > to reboot.
 > 
 > I had something like this happen to me when I tried to mount a floppy
 > that I had ejected without umounting (whoops).  Is it all CDs or only
 > one? ... although the fact that you can mount then under another
 > kernel makes me think that this isn't it.
 > 
 > > Here's the relevant line in the /etc/fstab:
 > > 
 > > /dev/cdrom        /cdrom   iso9660      ro,noauto,user,exec,nosuid 0 2
 > 
 > Looks good to me.
 > 
 > > Below is my kernel configuration that I used to compile the 2.2.18pre21
 > > kernel.  Perhaps there's some unnecesary conflict which is causing the
 > > problem.
 > > 
 > > Thanks for any help.
 > [...]
 > > #
 > > # Kernel hacking
 > > #
 > > # CONFIG_MAGIC_SYSRQ is not set
 > 
 > Say "yes" to this, read /usr/src/linux/Documentation/sysrq.txt and
 > recompile.  You may be able to kill the hung mount process with
 > alt-sysrq-K, and alt-sysrq-{S,U,B} will sync and umount your disks and
 > reboot your system.
 > 
 > You may want to try a non-"pre" kernel; I think there's a 2.2.19 out.
 > 
 > Rob

I reported this as a bug.  Herbert Wu also suggested I try out 2.2.19.  I
downloaded the source, but I haven't compiled it yet.  I probably won't
get to it for another two weeks.