Greg K-H replied to me: >> Some device has a working driver for Porteus's 64-bit kernel but a >> crashing driver for Porteus's 32-bit kernel, and the crash is so hard >> that it doesn't even start flashing two keyboard lights. Also this >> being text mode (when I type udevadm not startx), the crash is so hard >> that it doesn't print an oops. > > Use a serial console, that way you can see the oops happen there. Perhaps I should mention that I had tail -f /var/log/messages >/mnt/sdb1/what 2>&1 & running in the background before running udevd and udevadm trigger. The log included udev stuff until the crash, but did not include the oops. I think I own two USB-to-serial adapters and a serial reverse cable. I'll have to hunt for them and bring them to my employer. Do you think the oops will get out over a USB-to-serial adapter before the kernel crashes hard? (Several years ago I saved virtual serial output to a real file under VMware and diagnosed an oops, but the NEC VF-6 is a real notebook with some device that a VMware virtual PC doesn't have.) -- To unsubscribe from this list: send the line "unsubscribe linux-hotplug" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html