Arch Linux

chicha

Member

From: France

Registered: 2007-04-20

Posts: 271

Error at boot : mount Cannot find /proc/bus/usb in /etc/fstab or mtab

Hello !

A few days ago I modified my fstab following this howto, to make USB work with Virtualbox.

Basically I added an entry similar to this one in my /etc/fstab :

none            /proc/bus/usb    usbfs    devgid=85,devmode=664     0    0

I have now switched to Qemu and I do not need this setting anymore.
I commented it out.

Since then I have the following error at boot time after the step "Mounting Local Filesystems" :
mount : cannot find /proc/bus/usb in /etc/mtab or /etc/fstab.

Of course there is no reference to /proc/bus/usb in my fstab :

# 
# /etc/fstab: static file system information
#
# <file system>        <dir>         <type>    <options>          <dump> <pass>
none                   /dev/pts      devpts    defaults            0      0
none                   /dev/shm      tmpfs     defaults            0      0
#none    /proc/bus/usb    usbfs    devgid=1004,devmode=666    0    0

/dev/cdrom             /mnt/cd   iso9660   ro,user,noauto,unhide   0      0
/dev/dvd               /mnt/dvd  udf       ro,user,noauto,unhide   0      0
#/dev/fd0               /mnt/fl   vfat      user,noauto             0      0

# /dev/hdb5
UUID=46d6f20d-0020-4099-a792-bb9b1e74f4a6    none    swap    sw            0    0
# /dev/hdb1
UUID=62eec8ae-3c18-4225-b48b-57bc0497896f    /    ext3    defaults,noatime,user_xattr,errors=remount-ro    0    1

/dev/vg2/var    /var    ext3    defaults,noatime,errors=remount-ro    0    2
/dev/vg2/tmp    /tmp    ext3    defaults,noatime,errors=remount-ro    0    2
/dev/vg2/home    /home    ext3    defaults,noatime,user_xattr,errors=remount-ro    0    2

/dev/vg1/data    /media/data    ext3    defaults,noauto,user,errors=remount-ro    0    2
/dev/vg1/backup    /media/backup    ext3    defaults,noauto,errors=remount-ro    0    2

/dev/hda5    /media/_boot    ext3    defaults,noauto,errors=remount-ro    0    2

Having a look at /etc/rc.sysinit, I found out this  :

stat_busy "Mounting Local Filesystems"
/bin/mount -n -o remount,rw /
/bin/rm -f /etc/mtab*
# make sure / gets written to /etc/mtab
/bin/mount -o remount,rw /
# re-mount /proc , /sys  and usbfs so they can be written to /etc/mtab
umount /proc/bus/usb
if [ -e /proc/mounts ]; then
    grep -e "/proc " -e "/sys " -e "/dev " /proc/mounts >> /etc/mtab
fi
if grep -qw usbfs /proc/filesystems; then
    # Some people use custom permissions for their usbfs
    if grep -qw /proc/bus/usb /etc/fstab; then
        mount /proc/bus/usb
    else
        mount -t usbfs none /proc/bus/usb
    fi
fi

For me the error comes from "umount /proc/bus/usb" which should be replaced by "umount /proc/bus/usb 2> /dev/null" or something equivalent.

Do you have the same error ? Do you think rc.sysinit is responsible for this ?
Can you help removing this error message at boot ?

Thank you very much !

solstice

Member

Registered: 2006-10-27

Posts: 237

Website

Re: Error at boot : mount Cannot find /proc/bus/usb in /etc/fstab or mtab

it's clear the error come from rc.sysinit
but because of that line
mount /proc/bus/usb
it tries to mount the usbfs because it thinks (because of grep -qw /proc/bus/usb /etc/fstab) that you have a line in your fstab to mount /proc/bus/usb

to fix this.
delete the line with /proc/bus/usb in your fstab

or
change the line
if grep -qw /proc/bus/usb /etc/fstab; then
to
if grep -v ^# /etc/fstab |grep -qw /proc/bus/usb ;then

it's a bug
and should be filled with that last fix.

Last edited by solstice (2008-02-03 00:17:17)

chicha

Member

From: France

Registered: 2007-04-20

Posts: 271

Re: Error at boot : mount Cannot find /proc/bus/usb in /etc/fstab or mtab

Thanks solstice !

I am going to fill a bug.

chicha

Member

From: France

Registered: 2007-04-20

Posts: 271

Re: Error at boot : mount Cannot find /proc/bus/usb in /etc/fstab or mtab

http://bugs.archlinux.org/task/9496