Red Hat Bugzilla – Bug 111285
Lock up when unmounting USB disk-on-key.
Last modified: 2007-11-30 17:10:34 EST
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4.1) Gecko/20031114 Description of problem: I can mount my USB disk-on-key and move files to and from the device fine. If I run unmount on the device, the machine locks hard with no imput taken from the mouse or keyboard. X even stops updating. I can ping the machine and if I try to ssh to the box, the connection is made but that is all. The only recourse is to power the machine off. Here is the message log from the device being added: Dec 1 10:27:16 cobra kernel: hub.c: new USB device 00:1d.3-2, assigned address 2 Dec 1 10:27:16 cobra kernel: usb.c: USB device 2 (vend/prod 0x5dc/0x80) is not claimed by any active driver. Dec 1 10:27:19 cobra kernel: Initializing USB Mass Storage driver... Dec 1 10:27:19 cobra kernel: usb.c: registered new driver usb-storage Dec 1 10:27:19 cobra kernel: scsi3 : SCSI emulation for USB Mass Storage devices Dec 1 10:27:19 cobra kernel: Vendor: LEXAR Model: DIGITAL FILM Rev: /W1. Dec 1 10:27:19 cobra kernel: Type: Direct-Access ANSI SCSI revision: 02 Dec 1 10:27:19 cobra kernel: Attached scsi removable disk sda at scsi3, channel 0, id 0, lun 0 Dec 1 10:27:20 cobra kernel: SCSI device sda: 125952 512-byte hdwr sectors (64 MB) Dec 1 10:27:20 cobra kernel: sda: Write Protect is off Dec 1 10:27:20 cobra kernel: sda: sda1 Dec 1 10:27:20 cobra kernel: USB Mass Storage support registered. There is nothing in the log from where I unmounted it. Version-Release number of selected component (if applicable): kernel-2.4.22-1.2115.nptl How reproducible: Always Steps to Reproduce: 1. Attach disk-on-key to usb port 2. mount /dev/sda1 /mnt/diskonkey 3. umount /dev/sda1 Actual Results: The machine locked up. Expected Results: The device would have unmounted and the machine kept running. Additional info:
Please do this: - Switch to text with <Alt>F1. - Log in as root - echo 8 > /proc/sys/kernel/printk - echo 1 > /proc/sys/kernel/sysrq - Reproduce the problem Let me know if anything interesting was printed. If an oops happens, its top is most valuable and it usually scrolls away. But on a pingable machine, <Shift>PgUp should work.
Just to confirm this has happened to me, repeatedly, until I started trying to debug it using your suggestion, at which point it vanished without a trace, and works flawlessly everytime... Sorry. kernel: Vendor: Generic Model: STORAGE DEVICE Rev: 0113 kernel: Type: Direct-Access ANSI SCSI revision: 02
Thanks for the bug report. However, Red Hat no longer maintains this version of the product. Please upgrade to the latest version and open a new bug if the problem persists. The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases, and if you believe this bug is interesting to them, please report the problem in the bug tracker at: http://bugzilla.fedora.us/