john <j...@arcticwolf.myzen.co.uk> [11-06-12 20:52]: > 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 >
Hi John, if sysreq does not work after inserting the usbstick then the kernel stops working completly (the sysreq-code of the kernel is not entered), which seems to be that something happening on very low level (the problem not the sysreq-code of course... ;) Just another shot into the dark: Do you have modularized all usb-related stuff? This also may help to let the usb-sticks work correctly. Ah! Another thing: Insert the related modules into /etc/conf.d/modules so that they get loaded in a very early phase of the bootprocess. With modules loaded and with no usb-sticks as root inspect the according modules with modinfo -p <modulename> to see, whether there a additional parameters you may pass to the modules to get an extra of informations or - better - to fix the issue. Modify under "Kernel hacking" in the kernel config the "Default message log level" to see more. Furthermore there is a switch "Kernel debugging" with sub-options. May be turning on these may also help to get closer to all evil ;) Last thing: If there is nothing valueable stored on the usbsticks: Try to reformat the usbsticks. Instead of putting a FAT32-fs on the bare device, create a regular partition and create a Linux-fs (reiserfs, ext2/3/4 or like that) on that partition. This may not be good idea in general, but - if it works - this would give a hint, where to search next. Good luck! Best regards, mcc
