From: Elias Oltmanns <oltmanns@uni-bonn.de>
To: linux-hotplug@vger.kernel.org
Subject: Once more udev/hotplug and usb-storage devices
Date: Mon, 25 Apr 2005 21:27:57 +0000 [thread overview]
Message-ID: <87br82sg0y.fsf@denkblock.local> (raw)
--=-=-
Hi all,
unfortunately, I haven't quite worked out a reliable way to reproduce
my problem yet but I definitely haven't experienced this problem
before I switched to udev; but then I've changed quite a lot of other
things at the same time (change from debian/sarge to ubuntu).
On linux-2.6.11.7 with udev, hotplug, dbus-1 and hald but no X running,
I plug in my usb stick. If I'm lucky, nothing unexpected happens and I
can mount /dev/sda1 afterwards. Otherwise, a whole bunch of error
messages is generated and there is no way to access the media. In
fact, udev removes the freshly created device nodes even before I
remove the usb stick. In the latter case, removing and reinserting the
usb stick resolves the problem. However, a stale scsi_eh_0 process
remains and cannot be killed but apparently doesn't affect the
system's stability either. The relevant part of /var/log/syslog is
attached below.
As the explicit mentioning of scsi_eh_0 suggests, I haven't managed to
reproduce this problem if the usb stick has been inserted before. In
fact, I did achieve this but it involved unloading usb_storage, sd_mod
and scsi_mod so I ended up with a stale scsi_eh_0 again. So far, it
only appeared when hald wsa running at the time but I didn't try very
thoroughly without dbus-1 and hald and, as I said before, I can't
reproduce this problem reliably.
All this made me wonder whether it might be a timing problem. Please
tell me, if I can be of any help by giving you further information or
testing something else.
Kind regards,
Elias
-------- /var/log/syslog --------
--=-=-Content-Disposition: inline; filename=messages
Apr 25 20:25:12 denkblock kernel: usb 4-3: new high speed USB device using ehci_hcd and address 3
Apr 25 20:25:14 denkblock kernel: SCSI subsystem initialized
Apr 25 20:25:14 denkblock kernel: Initializing USB Mass Storage driver...
Apr 25 20:25:14 denkblock usb.agent[6537]: usb-storage: loaded successfully
Apr 25 20:25:14 denkblock kernel: scsi0 : SCSI emulation for USB Mass Storage devices
Apr 25 20:25:14 denkblock kernel: usbcore: registered new driver usb-storage
Apr 25 20:25:14 denkblock kernel: USB Mass Storage support registered.
Apr 25 20:25:14 denkblock kernel: usb-storage: device found at 3
Apr 25 20:25:14 denkblock kernel: usb-storage: waiting for device to settle before scanning
Apr 25 20:25:19 denkblock kernel: Vendor: Model: USB DISK 12X Rev: PMAP
Apr 25 20:25:19 denkblock kernel: Type: Direct-Access ANSI SCSI revision: 00
Apr 25 20:25:19 denkblock kernel: usb-storage: device scan complete
Apr 25 20:25:19 denkblock kernel: SCSI device sda: 507904 512-byte hdwr sectors (260 MB)
Apr 25 20:25:19 denkblock kernel: sda: assuming Write Enabled
Apr 25 20:25:19 denkblock kernel: sda: assuming drive cache: write through
Apr 25 20:25:19 denkblock kernel: SCSI device sda: 507904 512-byte hdwr sectors (260 MB)
Apr 25 20:25:19 denkblock kernel: sda: assuming Write Enabled
Apr 25 20:25:19 denkblock kernel: sda: assuming drive cache: write through
Apr 25 20:25:19 denkblock scsi.agent[6660]: sd_mod: loaded sucessfully
Apr 25 20:25:19 denkblock kernel: sda: sda1 sda2
Apr 25 20:25:19 denkblock kernel: Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0
Apr 25 20:25:19 denkblock udev[6697]: configured rule in '/etc/udev/rules.d/udev.rules' at line 27 applied, 'sda' becomes '%k'
Apr 25 20:25:19 denkblock udev[6697]: creating device node '/dev/sda'
Apr 25 20:25:19 denkblock udev[6715]: configured rule in '/etc/udev/rules.d/udev.rules' at line 27 applied, 'sda1' becomes '%k'
Apr 25 20:25:19 denkblock udev[6715]: creating device node '/dev/sda1'
Apr 25 20:25:24 denkblock kernel: usb 4-3: udev timed out on ep0in
Apr 25 20:25:29 denkblock udev[6716]: configured rule in '/etc/udev/rules.d/udev.rules' at line 27 applied, 'sda2' becomes '%k'
Apr 25 20:25:29 denkblock udev[6716]: creating device node '/dev/sda2'
Apr 25 20:25:29 denkblock kernel: usb 4-3: udev timed out on ep0in
Apr 25 20:26:59 denkblock kernel: usb 4-3: reset high speed USB device using ehci_hcd and address 3
Apr 25 20:27:00 denkblock kernel: usb 4-3: scsi_eh_0 timed out on ep0in
Apr 25 20:27:00 denkblock kernel: usb 4-3: device descriptor read/64, error -110
Apr 25 20:27:06 denkblock kernel: usb 4-3: scsi_eh_0 timed out on ep0in
Apr 25 20:27:06 denkblock kernel: usb 4-3: device descriptor read/64, error -110
Apr 25 20:27:06 denkblock kernel: usb 4-3: reset high speed USB device using ehci_hcd and address 3
Apr 25 20:27:07 denkblock kernel: usb 4-3: scsi_eh_0 timed out on ep0in
Apr 25 20:27:07 denkblock kernel: usb 4-3: device descriptor read/64, error -110
Apr 25 20:27:12 denkblock kernel: usb 4-3: scsi_eh_0 timed out on ep0in
Apr 25 20:27:12 denkblock kernel: usb 4-3: device descriptor read/64, error -110
Apr 25 20:27:12 denkblock udev[6757]: removing device node '/dev/sda2'
Apr 25 20:27:12 denkblock udev[6767]: removing device node '/dev/sda1'
Apr 25 20:27:12 denkblock kernel: scsi: Device offlined - not ready after error recovery: host 0 channel 0 id 0 lun 0
Apr 25 20:27:12 denkblock kernel: SCSI error : <0 0 0 0> return code = 0x50000
Apr 25 20:27:12 denkblock kernel: end_request: I/O error, dev sda, sector 0
Apr 25 20:27:12 denkblock kernel: Buffer I/O error on device sda, logical block 0
Apr 25 20:27:12 denkblock kernel: scsi0 (0:0): rejecting I/O to offline device
Apr 25 20:27:12 denkblock kernel: Buffer I/O error on device sda, logical block 1
Apr 25 20:27:12 denkblock kernel: Buffer I/O error on device sda, logical block 2
Apr 25 20:27:12 denkblock kernel: Buffer I/O error on device sda, logical block 3
Apr 25 20:27:12 denkblock kernel: Buffer I/O error on device sda, logical block 4
Apr 25 20:27:12 denkblock kernel: Buffer I/O error on device sda, logical block 5
Apr 25 20:27:12 denkblock kernel: Buffer I/O error on device sda, logical block 6
Apr 25 20:27:12 denkblock kernel: Buffer I/O error on device sda, logical block 7
Apr 25 20:27:12 denkblock kernel: usb 4-3: USB disconnect, address 3
Apr 25 20:27:12 denkblock kernel: scsi0 (0:0): rejecting I/O to dead device
Apr 25 20:27:12 denkblock kernel: Buffer I/O error on device sda, logical block 0
Apr 25 20:27:12 denkblock kernel: scsi0 (0:0): rejecting I/O to dead device
Apr 25 20:27:12 denkblock kernel: Buffer I/O error on device sda, logical block 64
Apr 25 20:27:12 denkblock kernel: scsi0 (0:0): rejecting I/O to dead device
Apr 25 20:27:12 denkblock udev[6807]: removing device node '/dev/sda'
Apr 25 20:27:12 denkblock kernel: usb 4-3: new high speed USB device using ehci_hcd and address 4
Apr 25 20:27:13 denkblock kernel: usb 4-3: khubd timed out on ep0in
Apr 25 20:27:13 denkblock kernel: usb 4-3: device descriptor read/64, error -110
Apr 25 20:27:18 denkblock kernel: usb 4-3: khubd timed out on ep0in
Apr 25 20:27:18 denkblock kernel: usb 4-3: device descriptor read/64, error -110
Apr 25 20:27:19 denkblock kernel: usb 4-3: new high speed USB device using ehci_hcd and address 5
Apr 25 20:27:20 denkblock kernel: usb 4-3: khubd timed out on ep0in
Apr 25 20:27:20 denkblock kernel: usb 4-3: device descriptor read/64, error -110
Apr 25 20:27:25 denkblock kernel: usb 4-3: khubd timed out on ep0in
Apr 25 20:27:25 denkblock kernel: usb 4-3: device descriptor read/64, error -110
--=-=-
-------- /var/log/syslog --------
--=-=-=--
-------------------------------------------------------
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next reply other threads:[~2005-04-25 21:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-25 21:27 Elias Oltmanns [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-05-02 13:45 Once more udev/hotplug and usb-storage devices E. Oltmanns
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