Ubuntu installer does not recognize SSD

[mancolric]

Following the post https://askubuntu.com/questions/1099...pst-feature-19, I have added the modification
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nvme_core.default_ps_max_latency_us=200"
to the /etc/default/grub file in the SSHD, and updated grub with sudo update-grub.

Now, the Ubuntu OS installed in the SSHD detects the SSD since I boot the computer.

I have tried the following. I have booted from the USB and selected "Try Ubuntu". The live Ubuntu didn't recognize the SSD. Therefore, I slept the computer and awaked it. Then, the live Ubuntu was able to see the SSD, and I installed Ubuntu in the SSD. However, I am unable to modify the grub file of the SSD's installation and, then, I am unable to succesfully boot the SSD partition.

Do you know how can I fix this problem?

[oldfred]

You can edit grub2's boot parameters the same way you edit for the nomodeset boot parameter which is one of the most common required parameters.

At grub menu you can use e for edit, scroll to linux line and replace quiet splash with nomodeset.
How to set NOMODESET and other kernel boot options in grub2 - both BIOS liveCD & grub first boot ( also UEFI with grub)
How to add boot parameters, grub menu after install (also grub when UEFI)
https://wiki.ubuntu.com/Kernel/KernelBootParameters &
https://help.ubuntu.com/community/Grub2
http://ubuntuforums.org/showthread.php?t=1613132

Instructions above should be changed to use sudo -H with any graphical app like gedit.
sudo -H gedit /etc/default/grub
or
sudo nano /etc/default/grub

[mancolric]

Thank you very much, Oldfred, it worked by changing grub booting options.

I am going to mark the post as [Solved] but, before, I am going to summarize all the process so that the post can be helpful to other people in the future.

[mancolric]

Steps to make Ubuntu see the SSD and to install Ubuntu there:

1) Boot from the USB with Ubuntu's live installation.

2) When the grub's menu appears with the options, "Try Ubuntu", "Install Ubuntu", press "e" and you will be able to edit grub's booting options. You will see something similar to this: https://wiki.ubuntu.com/Kernel/KernelBootParameters.

3) Go to the "linux" line and, after

quiet splash

, add the words

nvme_core.default_ps_max_latency_us=200

(see also https://askubuntu.com/questions/1099...pst-feature-19). Then press Ctrl+X to boot with these new option included.

4) The Ubuntu installer should now be able to see the SSD. Proceed to install.

5) Steps 1 to 4 only manage to make the Ubuntu installer to see SSD. The new Ubuntu SSD installation will present the same problem: it will not be able to see the SSD at all and will not be able to boot properly. Thus, when booting the new Ubuntu SSD installation for the first time, press "e" at the grub menu ("Ubuntu", "Advanced options for Ubuntu", etc) and repeat steps 1 to 3.

6) Now the Ubuntu SSD installation should be able to boot properly, but the previous modifications are only provisional. In order to make the booting option

nvme_core.default_ps_max_latency_us=200

permanent, open the grub file

sudo nano /etc/default/grub

make the modification

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nvme_core.default_ps_max_latency_us=200"

save the file, and update the grub

sudo update-grub

7) Enjoy!