USB devices dissapear: HAL shuts down on it's own

[Mikkel L. Ellertson]

Steven P. Ulrick wrote:
> Hello, Everyone
> I am finally going to try to do something about this problem that I
> have had at least with the last few releases of Fedora Core/Fedora.
> I have four USB devices hooked up to this machine:
> 1. Samsung ML-1250 Laser Printer (USB1)
> 2. Iomega CD-RW External Burner (USB2)
> 3. Epson Perfection 2400 Scanner (USB2)
> 4. Logitech USB Keyboard (USB2) (This problem does not affect this
> keyboard.)
> 
> In brief, the first three devices sometimes "dissappear."  The way that
> I used to find this out is that I would attempt to use one, and it
> would not work.  So, I would then, as root, run "lsusb"  The result
> would be that "lsusb" would hang and become a zombie process.  The only
> way to get rid of it, of course, is to reboot.
> Any attempts at accessing these devices after they have "dissappeared"
> results in at least one zombie process that I have to reboot to get rid
> of.
> So, it goes something like this:
> 1. I wanted to burn a CD.
> 2. Run "lsusb" to see if my USB devices had dissappeared.
> 
> 3a. If they have not, the output is something like this:
> [root at afolkey2 ~]# lsusb
> Bus 002 Device 004: ID 04b8:011b Seiko Epson Corp. Perfection 2400 Photo
> Bus 002 Device 003: ID 059b:005c Iomega Corp.
> Bus 002 Device 001: ID 0000:0000
> Bus 007 Device 001: ID 0000:0000
> Bus 006 Device 001: ID 0000:0000
> Bus 005 Device 002: ID 046d:c315 Logitech, Inc. Classic New Touch Keyboard
> Bus 005 Device 001: ID 0000:0000
> Bus 001 Device 001: ID 0000:0000
> Bus 004 Device 001: ID 0000:0000
> Bus 003 Device 003: ID 04e8:300e Samsung Electronics Co., Ltd
> Bus 003 Device 001: ID 0000:0000
> 
> 3b. If "lsusb" hangs, then I am forced to reboot to be able to use the
> device.
> 
> 
> I have learned a little bit more about this issue in the past few weeks.
> The following things are true is my USB devices dissapear:
> 1. "/etc/init.d/haldaemon status" returns "stopped" as the status.
> 2. "khubd", "scsi_eh_0", "scsi_eh_1", "scsi_eh_2", "ksuspend_usbd",
> "usb-storage" all become zombie processes, forcing me to reboot.
> 
> I have searched through several log files in /var/log and was not able
> to find anything that seemed relevant.  That doesn't mean that it isn't
> there, it just means that I could not find it.
> 
> Right now, all of my USB devices seem to be functioning as expected.  I
> somewhat expect this issue to come up again soon because ever since the
> most recent kernel update, this problem has gotten a lot worse.
> As soon as this happens again, I will be able to show you the output of
> "top" that shows the zombie/"D" status of the above mentioned processes.
> 
> OS Version: Fedora 8
> Install type: "Hard Drive", Fresh Install (not an upgraded)
> All official updates applied.  I only enable the official Fedora repos
> when I "yum update"  The only time that I use other repos is for stuff
> that I absolutely cannot get through the official Fedora repos.
> 
> Thank you in advance for all help that you are able to give me,
> Steven P. Ulrick
> 
You may want to run "lsusb -v" and look at the power numbers. 
Especially the numbers on the scanner and the CD-RW drive. It may be 
that you are drawing too much power for the USB socket or HUB, and 
the reboot is resetting the hubs.

Mikkel
-- 

   Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!

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