I have some additional info which might help. First of all, with all the kernel updates up until know the problem persists. However, it appears that it is not specific to the USB external disk. It also occurs every now and then if I use a 12in1 cardreader to read my photos from a flashcard.
Another thing I found out by accident is the following. The PCMCIA card has 2 USB 2.0 ports. If I use one for the external HD and one for the 12in1 cardreader and I get the soft lockup. If I then pull out the cardreader, Linux suddenly continues. This is 100% everytime the problem occurs. So for now my workarround is to use the external disk and if something happens I take out the cardreader and if everything is up and running put the cardreader in again. Below is another listing which was taken after the system recovered from the soft lockup when I pulled out the cardreader. [17180389.132000] EXT3-fs warning: maximal mount count reached, running e2fsck is recommended [17180389.264000] EXT3 FS on sde1, internal journal [17180389.264000] EXT3-fs: mounted filesystem with ordered data mode. [17180435.052000] BUG: soft lockup detected on CPU#0! [17180435.052000] <c01491cf> softlockup_tick+0x9f/0xf0 <c012bee1> update_process_times+0x31/0x80 [17180435.052000] <c01070ac> timer_interrupt+0x7c/0xb0 <c0149323> handle_IRQ_event+0x33/0x60 [17180435.052000] <c01493ed> __do_IRQ+0x9d/0x110 <c0105c89> do_IRQ+0x19/0x30 [17180435.052000] <c010408a> common_interrupt+0x1a/0x20 <c0149307> handle_IRQ_event+0x17/0x60 [17180435.052000] <c01493ed> __do_IRQ+0x9d/0x110 <c0105c89> do_IRQ+0x19/0x30 [17180435.052000] <c010408a> common_interrupt+0x1a/0x20 <c014007b> disk_store+0x10b/0x12e [17180435.052000] <c012782f> __do_softirq+0x5f/0xe0 <c01278e5> do_softirq+0x35/0x40 [17180435.052000] <c0105c8e> do_IRQ+0x1e/0x30 <c010408a> common_interrupt+0x1a/0x20 [17180435.052000] <f8cd6902> nvram_read+0x72/0xd0 [nvram] <c0138f47> lock_hrtimer_base+0x27/0x60 [17180435.052000] <c013901d> hrtimer_try_to_cancel+0x2d/0x50 <c013904e> hrtimer_cancel+0xe/0x20 [17180435.052000] <c02da593> do_nanosleep+0x53/0x70 <c0139199> hrtimer_nanosleep+0x49/0x120 [17180435.052000] <c02daeb0> lock_kernel+0x20/0x40 <c016af6c> vfs_read+0xbc/0x180 [17180435.052000] <f8cd6890> nvram_read+0x0/0xd0 [nvram] <c016b4e1> sys_read+0x41/0x70 [17180435.052000] <c0102fbb> sysenter_past_esp+0x54/0x79 [17180472.272000] usb 6-2: USB disconnect, address 2 Hope this helps. Bye the way, I first thought of installing the kernel debug version but then I read the description and that it is of no use to boot from it. If I can help in any other way by providing more info by activating extended logging or whatever, please explain what I need to do. -- random soft lockup with external usb harddisk https://bugs.launchpad.net/bugs/78433 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
