Re: 2.4.0-prerelease IDE CD-ROM problem

Re: 2.4.0-prerelease IDE CD-ROM problem

[Wayne.Brown]

OK, mystery (partially) solved.  I have the Gnome CD Player applet running in my
panel.  (Yeah, I know, if I'm running Gnome, I deserve whatever I get.  :-)
Anyway, the CD player can be added to the panel in two forms: a launcher that
just launches the application window, and an applet that has controls which
allow a CD to be played directly from the panel without opening a window.  I
recently switched from the first to the second variety.  It turns out that this
applet apparently grabs the device as soon as a CD is inserted (to identify the
CD and, if necessary, go out on the Internet to find it in the CDDB database).
It doesn't prevent a data CD from being mounted or unmounted, but in the most
recent kernels, it _does_ prevent the CD drive tray from being unlocked after
it's unmounted  The only way to open the drive is to hit the "Eject" control on
the applet itself.  When I tried this yesterday, it hung and required a reboot
every time.  However, the new (Jan 4) version of prelease-diff fixed this so
that the eject control works.  Without this applet running, the CD drive behaves
normally.

BTW, this isn't just a ThinkPad issue; my homebuilt Pentium MMX tower exhibits
the same behavior.


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2.4.0-prerelease IDE CD-ROM problem

[Wayne.Brown]

If I mount and unmount a CD on my ThinkPad 600X under 2.4.0-prerelease, the
drive never unlocks and I can't eject the CD.  It doesn't matter whether I read
any data from it or not before the umount command.  Subsequent attempts to
access the drive in any way -- mount, dd, etc. -- hang and the processes can't
be killed, even with kill -9.  I have to reboot to get out of it.  The rest of
the system continues to work normally, except that within a few minutes, I start
getting temporary hangs (about 5 seconds duration) every couple of minutes.  The
keyboard locks, the screen freezes, then a few seconds later everything
unfreezes and it works OK for another few minutes.

Playing an audio CD doesn't trigger this problem; only mounting and unmounting
does.  Since I haven't been using my CD drive much lately, I'm not certain
exactly when this problem started.  It happens under both the "original"
2.4.0-prerelease and one patched with the latest prerelease-diff.  I'm pretty
certain it didn't happen under 2.4.0-test12, but I can't remember if I used the
CD under any of the test13-pre versions or not.  My system is pretty much
standard Slackware 7.1, except for the 2.4.0 kernel and upgrades to modutils,
binutils, etc. to bring everything into sync with what's specified in
Documentation/Changes.  The compiler is egcs-2.91.66.

Wayne


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