Exercise 21.2: Mounting Options,kernelcrash

Hi Berni,

1.- What hardware are you working with? I mean brand and model, please. So we could look to somethings in the BIOS, like the following:

i.- CPU / Split Lock Detection / change it to disabled (if your BIOS has that parameter).
ii.- Security / Secure Boot / change it to disabled.

2.- You are working on a bare metal laptop, not in a VM, right?

3.- You can do the modification of the linux line boot "on the fly" for just testing purposes, which will work once, and if it works you can do it permanently.

i.- To test it once:

a.- In the GRUB boot menu, select the kernel and press the 'e' key to edit it.

b.- Find the line that begins with 'linux'. It usually ends with parameters like 'quiet' or 'ro'.

c.- At the end of that same line, add a space and type: split_lock_detect=warn

d.- Press Ctrl+X or F10 to boot with this parameter.

4.- If that works -i.e. prevents the kernel crash, you can put it in the grub configuration as follows:

i.- Edit the configuration file: sudo nano /etc/default/grub

ii.- Find the line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" (the parameters may vary).

iii.- Add the parameter within the quotation marks: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash split_lock_detect=warn"

iv.- Save the file and update the boot menu with: sudo update-grub

v.- Reboot and try the lab.

Regards,
Luis.