[10.04 LTS] Freeze when unplugging USB devices (pb with 2.6.32-33)

[rederon]

Hello,
I noticed freeze issues when unplugging USB devices (hard drive ou key).
The problem has been encoutered on 10.04 LTS.
Before, my computer was running on 8.04 LTS without any problem. An even rigth after the upgrade toward 10.04 LTS, there was no problem. It apperared suddenly in may or june 2011. I supposed it was linked to a kernel update.
The kernel level of the 10.04 LTS CD-ROM was 2.6.32-28.
The kernel level when I saw the problem was 2.6.32-33.
I decided to uninstall 2.6.32-33 to comme back to a previous version.
By unistalling just 2.6.32-33 (then running on 2.6.32-32), it solved the issue!
Then I reinstalled 2.6.32-33: The problem appeared again.
Thus I uninstalled 2.6.32-32 a second time, and the problem disappeared.
Then no doubt seems possible for me: The issue is due to "linux-image-2.6.32-33-generic"

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in dianosing the problem. From a terminal window please run:

apport-collect 811408

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[PeterW (peterbat)]

This problem has occurred on two separate systems of mine both running Ubuntu 10.04 LTS and does seem to be associated with a recent kernel update to 2.6.32-32.

[Hervé CROISET (hcros2000)]

Hello,
1) Same diagnostic : freeze issue when unplugging USB Hard Disk using LTS 10.4 / Linux-image-2.6.32-33-generic (last upgrade).

/var/log/message :
Jul 26 21:16:32 tux-laptop kernel: [ 62.674963] sdb: sdb1
Jul 26 21:16:32 tux-laptop kernel: [ 62.705811] sd 6:0:0:0: [sdb] Attached SCSI disk
Jul 26 21:18:37 tux-laptop kernel: imklog 4.2.0, log source = /proc/kmsg started.
Jul 26 21:18:37 tux-laptop rsyslogd: [origin software="rsyslogd" swVersion="4.2.0" x-pid="964" x-info="http://www.rsyslog.com"] (re)start
Jul 26 21:18:37 tux-laptop rsyslogd: rsyslogd's groupid changed to 102
Jul 26 21:18:37 tux-laptop rsyslogd: rsyslogd's userid changed to 101
Jul 26 21:18:37 tux-laptop kernel: [ 0.000000] Initializing cgroup subsys cpuset
Jul 26 21:18:37 tux-laptop kernel: [ 0.000000] Initializing cgroup subsys cpu
     End of the messages...

/var/log/kern.log
     Noindicationc

2) No trouble with previous Linux-image-2.6.32-32_generic.

/var/log/message :

Jul 26 21:19:41 tux-laptop kernel: [ 93.119843] sd 6:0:0:0: [sdb] Attached SCSI disk
Jul 26 21:19:57 tux-laptop kernel: [ 108.486374] usb 2-3: USB disconnect, address 3
Jul 26 21:23:08 tux-laptop kernel: [ 299.876617] Machine check events logged

/var/log/kern.log
Jul 26 21:19:41 tux-laptop kernel: [ 93.088224] sdb: sdb1
Jul 26 21:19:41 tux-laptop kernel: [ 93.119837] sd 6:0:0:0: [sdb] Assuming drive cache: write through
Jul 26 21:19:41 tux-laptop kernel: [ 93.119843] sd 6:0:0:0: [sdb] Attached SCSI disk
Jul 26 21:19:57 tux-laptop kernel: [ 108.486374] usb 2-3: USB disconnect, address 3
Jul 26 21:23:08 tux-laptop kernel: [ 299.876617] Machine check events logged