Hello,
I achieved to make running Debian9 on my Lenovo T560.
But..
the motherboard was exchanged this morning because it was defect (the same SSD is used again), then the BIOS was updated to the latest version, and now it dont boot anymore (it dont goes into Grub).
This is perhaps again a question of legacy/UEFI boot. If somebody can help and inform of its BIOS setup, I will have a look again there.
THANKS a lot.

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Guess you could see if a live usb would boot.

Can look at any bios entry for how it detects hard drive.

Motherboard may or may not be OK.

Try booting to grub to try safe mode I think by pressing space bar.

What happens when you boot?

Thanks. The remarks/questions & answer are

Guess you could see if a live usb would boot.
yes. see the old dmesg status when it worked and the new dmesg from live boot in the attachment. same bios version. I see all data on the SSD. The SSD is recognized as boot with GPARTED and see the screen copy in the attachment for that.

Can look at any bios entry for how it detects hard drive.
A photo is posted and the USB live and the SSD are detected

Motherboard may or may not be OK.
..

Try booting to grub to try safe mode I think by pressing space bar.
it dont goes into Grub ab all. it stay at a situation where the SSD is recognized. see picture in previous post.

What happens when you boot?
the BIOS standard message comes up and it tray to boot the SSD. It dont boot it but display the message it is recognized by the BIOS in the picture of the previous post. The whole drive can be seen and all data can be seen with the Debian8 live booted via USB.

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Attached Files

	dmesg.log (53.7 KB, 2 views)
	dmesgT560liveDeb8boot.txt (52.9 KB, 3 views)

What is that NVMe0 at the bottom???? Hummm.

I asked 2h ago in a lenovo forum: perhaps the BIOS was not updated correctly after the mainboard was updated etc. ?

What is this bios issue? Did you do it already? Is there any bios setting that reports devices like drives or ssd's?
Don't start with the bios update, that is the last choice.

From a brief look at your problem I mentioned if NvMe0 isn't the ssd.

To the questions in the previous post:

What is this bios issue?
when the service person from LENOVO came and exchanged the mainboard, the mainboard was not with the newest BIOS. After the new motherboard was mounted, the service person flashed with an USB stick (if I remember, for sure it was not done with an ISO on CD) the motherboard with the newest BIOS version. When I boot the notebook with a Debian8 live USB, I can see the BIOS version indicated in DMESG is the same than the BIOS of the "old defect" motherboard (I have an DMESG file from the defect mainboard).

Did you do it already?
With the "old defect" motherboard, I made a BIOS update with an ISO on CD (from the LENOVO page). It worked fine. After that BIOS update I made End February I could boot the PC. Only the new motherboard with the updated BIOS dont boot my SSD.

Is there any bios setting that reports devices like drives or ssd's?
The view of the BIOS settings is in a previous post. We can see an ATA HDD0 Samsung (which is in fact the SSD)

From a brief look at your problem I mentioned if NvMe0 isn't the ssd.
I had a look at LENOVO page where they speak about that "drive". https://forums.lenovo.com/t5/ThinkPa...t/td-p/3295287 This is perhaps a partition recognized by the BIOS. I moved that NvMe0 as first in the boot priority but it did not boot.

The question which came in my head is: perhaps I should re-install Debian9 again? during the installation, perhaps few key parameters are overtaken by the UEFI setup of Debian9 on the SSD. Or perhaps there is a Debian9 UEFI setup to run again in order to have a correct link between the BIOS, the MBR and the Grub bootloader. But: it should be a remote setup because the notebook dont boot from the SSD.

And: https://wiki.debian.org/GrubEFIReinstall a repair is perhaps necessary after each BIOS update and/or motherboard change.

In the Debian8 USB boot session, I made..
download the deb package from http://www.rodsbooks.com/refind/getting.html
install it
So, now the notebook boot into "rEFInd" before it goes into my Debian9 (update/upgrade works; all partitions and files accessible). Now, I should find a method to get rid of rEFInd and boot directly into grub & Debian9 as previously (whatever, booting first in rEFInd is not a massive issue; just not necessary for the usual use).
Topic CLOSED (I open another thread later to get rid out of rEFInd).

Thanks to jefro for the help.