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Umount hang in Fedora

by Azrael / March 28, 2004 3:21 AM PST

Hello,

I have Fedora Core 1 installed on my system (updates and all). I have recently noticed a problem with umount.
It first occured when I was burning a lot of CD's: after I had finished one CD, I would take it out of my CD-writer and place it in my DVD-ROM drive to check it's contents.

Fedora has a sort of "autorun" feature that mounts the CD when you close the drive and opens up a konqueror window to display the disks contents. After a quick check of the contents, I would umount the cd-rom and eject the cd.

I had just finished checking a CD, and when I umounted the drive from the command line, my PC froze. The mouse pointer would not move and I couldn't use ctrl+alt+F1 or anything to get to another console to see what the problem was.

After a reboot, everything was fine, but the problem keeps occurring every so often. I'll just umount a CD, and the computer will freeze. I thought it might be something to do with the DVD-drive, but yesterday the same thing happened umounting a floppy disk.

Can anybody shed some light on this matter? I've had a look using google, but I can't find anything similar to this.

Thank you

Peter Green.

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Re:Umount hang in Fedora
by David Utidjian / March 28, 2004 8:26 PM PST
In reply to: Umount hang in Fedora

Weird. I haven't seen this problem with FC1 on any of about 12 systems I have it installed on.

Try editing the /etc/xinetd.d/sgi_fam file.
Add a line directly above the line that says:

type = RPC UNLISTED

add

disable = yes

so that the file now has the top two lines within the "{}" read:

disable = yes
type = RPC UNLISTED

The restart xinetd with:

service xinetd restart

Does the problem go away?

The above change to sgi_fam will stop the system from automounting CDs. sgi_fam has been rather buggy in that on some systems it tends to refuse to umount a disk even when nothing is really using it (except sgi_fam). You can turn it back on again if you like by just changing the "yes" to a "no" on the disable line you added and restarting xinetd.

-DU-...etc...

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Re:Re:Umount hang in Fedora
by chuckieu / March 29, 2004 3:55 AM PST

David, I've been having a similar problem since moving from RH9 to FC1. What mine does is refuse to eject. It
says the drive is in use. The only way to eject is logout
and when I log back in, the drive is clear. I saved the
info you gave, but I'm not sure it applies. The Fedora Core Bible doesn't mention this particular problem.
chuck

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Re:Re:Re:Umount hang in Fedora
by David Utidjian / March 29, 2004 12:03 PM PST

I think your problem may be more like mine than Azraels.

When your system fails to eject a CD, try (as root):

service xinetd restart

If you can eject right after that, then it is the sgi_fam bug. It is not a very elegant way to work around the problem but it is easier than logging out.

I found this bug myself (as have many others) and also found it listed at:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=106936
Which is an interesting read in itself. Seems that there is no agreement yet on exactly what the problem is... but everyone seems to report that restarting xinetd clears it, at least, temporarily.

Never heard of the "Fedora Core Bible". Is it a good book?

-DU-...etc...

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Re:Re:Re:Re:Umount hang in Fedora
by chuckieu / March 30, 2004 3:18 AM PST

Thanks, David. Saved page and will try solution. As to Bible, actual name is "Red Hat Linux and Fedora Unleashed". It is the same as "Red Hat Linux Bible" with
Fedora Core updates. Had both books at same time to compare. From Sams Publishing. 1047 pages. Excellent
resource(comes with FC1 disks(2.4.22-1.2115.nptl).
chuck

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Also............
by chuckieu / March 30, 2004 3:27 AM PST

Read info at link.Don't think unchecking Automount will help. Will try that also, but it seems to become a problem after mounting. This is me thinking, not from info.
FC3?-I haven't even seen FC2. chuck

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Re:Also............
by David Utidjian / March 30, 2004 7:45 AM PST
In reply to: Also............

Well... like I said. It isn't just a matter of not automounting it is a matter of NOT autoUmounting when you rightclick --> eject. The workaround I posted works for me.

Yeah I can't quite figure out what they mean by FC3. That won't show up till late summer -- late fall 2004. Perhaps they mean test3 for FC2 (shrug).

-DU-...etc...

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