| 1 |
john <jdm@×××××××××××××××××××.uk> [11-06-12 16:36]: |
| 2 |
> Gents |
| 3 |
> |
| 4 |
> Whenever I insert external USB device my machine locks and I have to do |
| 5 |
> a hard reset (sys req does not even work). I have tried this in a |
| 6 |
> graphical environment and without. Machine boots up fine with USB |
| 7 |
> keyboard and mouse but will not boot up with usb storage (memory stick |
| 8 |
> - tried several) |
| 9 |
> |
| 10 |
> I have recently upgrade kernel to 2.6.38-r6 when this error started |
| 11 |
> (approx). Hav also tried 2.6.38-r7 (which according to bugzilla |
| 12 |
> should fix an issue similar to this) the error still happens. |
| 13 |
> |
| 14 |
> Any suggestions on kernel config options, debugging would be |
| 15 |
> appreciated. And how to trap full error message. |
| 16 |
> |
| 17 |
> Error message alongs these lines |
| 18 |
> |
| 19 |
> Kernel panic not syncing - fatal exception in iterrupt |
| 20 |
> ksoftirqd/1 Not tainted |
| 21 |
> |
| 22 |
> |
| 23 |
> |
| 24 |
> |
| 25 |
> -- |
| 26 |
> -------------- |
| 27 |
> -------------- |
| 28 |
> John D Maunder |
| 29 |
> jdm@×××××××××××××××××××.uk |
| 30 |
> |
| 31 |
|
| 32 |
Hi John, |
| 33 |
|
| 34 |
may be this could help to track th eerror more closely: |
| 35 |
Recompile the kernel with CONFIG_USB_DEBUG set. |
| 36 |
If not already done, enable CONFIG_MAGIC_SYSRQ and |
| 37 |
read about the available commands in the according |
| 38 |
docs under /usr/src/linux/Documentation/. |
| 39 |
This is a overall life saver in many other cases too. |
| 40 |
But it may be a security hole also -- you can disable |
| 41 |
it in /proc/ later. |
| 42 |
If possible change /etc/fstab to mount the partition |
| 43 |
to which logging will go with the "sync" option so |
| 44 |
every log entry will go directly onto the bare metal |
| 45 |
instead of a RAM buffer. |
| 46 |
|
| 47 |
Reboot into console mode (no X). |
| 48 |
cd to the logging directory and |
| 49 |
do a tail -f onto the logfile in question |
| 50 |
|
| 51 |
Insert the "USB stick of death" ;) and |
| 52 |
see, whether you can see anything in the |
| 53 |
tailed log. |
| 54 |
|
| 55 |
If not do the magic sysrq dance to sync hds, |
| 56 |
remount readonly and finally reboot. |
| 57 |
|
| 58 |
Take a closer look into the resulting logs. |
| 59 |
|
| 60 |
Good luck! |
| 61 |
|
| 62 |
Nevertheless have a nice weekend! |
| 63 |
Best regards, |
| 64 |
mcc |
Archives