On Sun, 12 Jun 2011 16:45:38 +0200 meino.cra...@gmx.de wrote: > john <j...@arcticwolf.myzen.co.uk> [11-06-12 16:36]: > > Gents > > > > Whenever I insert external USB device my machine locks and I have > > to do a hard reset (sys req does not even work). I have tried this > > in a graphical environment and without. Machine boots up fine with > > USB keyboard and mouse but will not boot up with usb storage > > (memory stick > > - tried several) > > > > I have recently upgrade kernel to 2.6.38-r6 when this error started > > (approx). Hav also tried 2.6.38-r7 (which according to bugzilla > > should fix an issue similar to this) the error still happens. > > > > Any suggestions on kernel config options, debugging would be > > appreciated. And how to trap full error message. > > > > Error message alongs these lines > > > > Kernel panic not syncing - fatal exception in iterrupt > > ksoftirqd/1 Not tainted > > > > > > > > > > -- > > -------------- > > -------------- > > John D Maunder > > j...@arcticwolf.myzen.co.uk > > > > Hi John, > > may be this could help to track th eerror more closely: > Recompile the kernel with CONFIG_USB_DEBUG set. > If not already done, enable CONFIG_MAGIC_SYSRQ and > read about the available commands in the according > docs under /usr/src/linux/Documentation/. > This is a overall life saver in many other cases too. > But it may be a security hole also -- you can disable > it in /proc/ later. > If possible change /etc/fstab to mount the partition > to which logging will go with the "sync" option so > every log entry will go directly onto the bare metal > instead of a RAM buffer. > > Reboot into console mode (no X). > cd to the logging directory and > do a tail -f onto the logfile in question > > Insert the "USB stick of death" ;) and > see, whether you can see anything in the > tailed log. > > If not do the magic sysrq dance to sync hds, > remount readonly and finally reboot. > > Take a closer look into the resulting logs. > > Good luck! > > Nevertheless have a nice weekend! > Best regards, > mcc > > >
Thanks mmc, CONFIG_MAGIC_SYSRQ and CONFIG_USB_DEBUG set to y When I plug in USB device SYSREQ does not work. I have tested when system is normal and all ok with SYSREQ so USB device is locking up system completely. I have put sync in mount table but when device is inserted error log is not being produced (in /var/log/messages, etc). I may end up having to take a photo of error log(lol). Or there maybe some other way of catching error which Gentoo gurus may advise. I have tried 3 memory sticks and they all lock system up. These work on another PC using Arch and work on this PC dual booting with Windows. I have a usb hard drive which works ok so it is a memory stick only issue!!!!???? Hmmm. -- -------------- -------------- John D Maunder j...@arcticwolf.myzen.co.uk
