On Wed, Jul 04, 2018 at 07:52:48PM +0200, DOMINIQUE VAYSSAIRAT wrote:
> Hello Word,
>
> Please, does someone have an idea for the problem below :
>
> I built a lfs 7.10 / systemd machine on three stages :
> 1 - on a virtual machine under virtualbox
> 2 - many tries on a physical machine (which is a macbook pro) and using
> several different externals disks (SSD, SD cards) plugged on a USB ports
> 3 - finally i get success with a SSD plugged on a thunderbolt port
>
> First and third tries are OK/
> Second trie end with a kernel panic each time.
> I think that the problem is about USB because on the screen of the kernel
> panic I see that the kernel do not found the / partition.
> I tried with boot=/dev/sda4 , boot=UUID=xxx and finally boot=PARTUUID=xxx
> with the same result
>
> The third trie start correctly, the external disk used has two ports : USB-3
> and Thunderbolt and one can use it in others circumstances alternatively
> (either USB or Thunderbolt)
> When i plug it with thunderbolt ==> OK
> Without any change plugging it with USB ==> kernel panic
> The only-one différence is the cable and connected port.
>
> All the kernel is compiled without module option but only with =y
>
> Regards, Dominique
>
A couple of thoughts:
1. Booting from external USB drives has often been a bit iffy, in
particular kernels have needed a delay before the drive would
appear. No idea if that applies to USB-3.
2. The USB-3 drivers are XHCI in kernel config - make sure you have
ALL the XHCI options enabled, at least until it works.
Also, of course, 7.10 is old and there have been a LOT of kernel
vulnerability fixes since then (or Meltdown on intel CPUs, gcc-8 is
required). So once you have managed to get it booting from external
USB-3 you should probably plan on building a new system.
ĸen
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