USB hotplugging does not work on all machines anymore

[Markus Huber]

k5knt at cox.net wrote:

> I tried the same thing with a problem I'm having. The command should be:
> 
> /sbin/rmmod ehci-hcd

This did half the trick for me!

My USB storage can be mounted now, so I have my backup disk available
again (which is great!). I still do not know why the notebook
automatically recognises it.

Unfortunatelly my scanner is still not yet working, with the ehci
drivers the scanner gets recognized but the whole thing freezes, with
the ohci driver the scanner is not recognized at all.

So, after doing /sbin/rmmod ehci-hcd I can access the USB harddisk, but
not the scanner. But even after removing the ehci module, the disk is
not recognized when I first try to start the scanner.

Weird. I'll have to try my scanner on my notebook. It seems to me that
not every piece of hardware (motherboard) is affected.

For my USB harddisk the reading when it works is:

# tail -f /var/log/messages
Mar 15 21:20:08 localhost kernel: Attached scsi disk sda at scsi1,
channel 0, id 0, lun 0
Mar 15 21:20:08 localhost scsi.agent[5552]: disk at
/devices/pci0000:00/0000:00:03.0/usb2/2-2/2-2:1.0/host1/target1:0:0/1:0:0:0
Mar 15 21:20:09 localhost fstab-sync[5596]: added mount point
/media/usbdisk for /dev/sda1
Mar 15 21:20:12 localhost pam_timestamp_check: pam_timestamp: `/' owner
UID != 0Mar 15 21:20:15 localhost kernel: kjournald starting.  Commit
interval 5 secondsMar 15 21:20:15 localhost kernel: EXT3-fs warning:
maximal mount count reached, running e2fsck is recommended
Mar 15 21:20:15 localhost kernel: EXT3 FS on sda1, internal journal
Mar 15 21:20:15 localhost kernel: EXT3-fs: recovery complete.
Mar 15 21:20:15 localhost kernel: EXT3-fs: mounted filesystem with
ordered data mode.
Mar 15 21:20:15 localhost kernel: SELinux: initialized (dev sda1, type
ext3), uses xattr

-- 
Regards
Markus Huber