Daniel Frey <djqfrey <at> gmail.com> writes:
> It appears to be udev. Somewhere along in its stupid detection it > decides to process USB devices before sata ports, thusly randomly > renaming the boot drive to something else in the process. > It took me forever to figure this out, I eventually had a lightbulb > moment and used my phone to record video of it booting, then slowing it > down, as when the kernel panics you can't scroll back up to see WTF > happened. Kernel crash dumps might help [1] > This is an older machine, but I'm not convinced it's the motherboard > doing this. I've checked the boot order in the BIOS. I've also tried > setting and unsetting "BIOS order determines boot disk" in the kernel > config and it made no difference. You might want to 'emerge -1 sys-apps/hwids' > What eventually fixed it was building USB as modules. (Another kludge!) There are numerous 'usb sniffers' that capture data. Some clue might be found using a usb sniffer. > I have no custom udev rules, the only rules I could find were in > /lib/udev/rules.d: I use sys-fs/eudev. ymmv. > Does anyone have any explanation for this daft behaviour or know where I > should look? > I have multiple machines and it's only this one that has this problem, > which happened after a <at> world update long ago. If you have a similar setup on similar hardware, then 'diff' the (dmesg) boot log files for any differences and analyze. hth, James [1] https://wiki.gentoo.org/wiki/Kernel_Crash_Dumps
