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Re: Kernel problem?




On 07/01/2018 21:27, Marc Auslander wrote:
The new kernel implements the "fix" for meltdown.  You could try booting
with the fix turned off - I believe the kernel parameter is pti=off
Rob Hurle <rob1940@xxxxxxxxx> writes:

Hi All,

I'm running Stretch and yesterday I did my normal:

sudo apt-get update
sudo apt-get upgrade

It seemed to install vmlinuz-4.9.0-5-686-pae (and associated config
and image files, etc) in place of 4.9.0-4-686-pae versions. Now the
system won't boot at all. I have reverted to 4.9.0-4-686-pae and all
is well. My questions are:

1. Does anyone else see this?

2. How can I revert without losing my working 4.9.0-4-686-pae system?
Can I just change the soft links for initrd.img and vmlinuz at / to
point to the 4.9.0-4-686-pae versions instead of the 4.9.0-5-686-pae
ones? Will this break something else for a future upgrade?

Any help much appreciated. Thank you.

Cheers, Rob Hurle

-----------------------------
Rob Hurle
e-mail: rob1940@xxxxxxxxx
Mobile: +61 417 293 603 (Australia)
Telephone: (02) 6236 3895
28 Mirrormere Rd, Burra, NSW 2620, Australia


Hi, if the hang is due to memory isolation option, then "nopti" added as a kernel boot parameter will cancel it. If you are on an Intel machine this will leave you exposed to the new class of "Meltdown" attacks. This kind of boot problem seems to happen to a very small number of systems, patches are already queued in the kernel to (hopefully) correct this, but you will have to wait for them to be merged.

Hope it helps.