Public bug reported: I am experiencing a kernel hang when using various external hard drives and my printer (Canon MP610 driver), all of which I connect using USB. The general symptom is that when I connect either of these devices, my system freezes up completely after about 10 minutes. They work just fine prior to that moment.
I can reproduce this within two minutes by connecting a USB flash drive and running "sudo dd if=/dev/sdb1 of=/dev/null bs=4K" I am running Ubuntu 10.10 64-bit on a Dell Studio XPS 16 (Motherboard 1647, Core i5, ATI Radeon HD5730). I've looked through some of my logs (/var/log/messages seemed the most useful) but haven't been able to find any kind of USB related logging nor anything interesting happening prior to the hang. Is there anyway to enable more verbose debugging of the USB subsystem or some other log I should be looking at? I have tested this using various kernels with the following results: 2.6.32-28 (Lucid) - WORKS 2.6.35-22 (Maverick) - HANGS 2.6.35-24 (Maverick) - HANGS 2.6.35-25 (Maverick) - HANGS 2.6.36-020636.201010210905 (mainline from kernel-ppa) - HANGS So this appears to be a regression introduced at some point between 2.6.32-28 and 2.6.35-22. ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/721954 Title: Kernel hangs when using USB storage or printer -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs