Hi, Stefano.

Don't pay too much attention to the SL version number in the grub2 boot menu. These labels are set when the kernel is installed or updated, and don't necessarily reflect the SL version you're currently running. If you updated the kernel to the latest version (3.10.0-957.1.3.el7) before upgrading from 7.5 to 7.6, there would not have been any further kernel upgrade during the 7.6 upgrade, so no update to the grub2 menu. All you're choosing from the boot menu is a particular version of the kernel, and kernel versions are more or less independent of the SL release number (or at least the minor version number). Any "3.10.*.el7" kernel version should work with any SL 7.* release.

The more important indicator is the value in the file /etc/yum/vars/slreleasever. If it's 7.6 or 7x, then yum will grab the latest SL 7.6 updates and you should be fine. If it's gone back to 7.5 for any reason, then you may have a problem requiring another attempt at upgrading to 7.6. But even so, it's highly unlikely that all the RPM package that got installed during the 7.6 upgrade got downgraded to the 7.5 versions, as yum doesn't usually downgrade unless explicitly told to.

Gilles

On 2019-01-29 04:14, S. Vergani wrote:
Dear John,

thank you very much for your help. I tried the "magic spelling" the post suggested, but nothing happened. This is such a weird issue, the first day SL 7.6 was completely different and when I shut down I somehow downgraded back to 7.5 even if now it still says I am running SL 7.6 but in boot phase I can choose only SL 7.5.

Regarding the overnight freezes, I have been fighting against it forever. It happens in every situation, simply every time I clik "restart" or I close the pc without locking it, it freezes forever. This started when I upgraded from SL 7.4 to 7.5. Before that, it was perfect. Apparently, the issue was solved upgrading to SL 7.6 but now this second issue kicked in.

Do you have any other suggestion?

Many thanks,

Stefano

--
Gilles R. Detillieux              E-mail: <[email protected]>
Spinal Cord Research Centre       WWW:    
https://urldefense.proofpoint.com/v2/url?u=http-3A__www.scrc.umanitoba.ca_&d=DwICaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=VQLV05LiafOuJFbkavFFar-ev4hCGSmK2JuAGht7gyM&s=xnraw06faga3ULLTUCWOeKtz6fxNZ9P1q4oOyLeskg8&e=
Dept. of Physiology and Pathophysiology, Faculty of Health Sciences,
Univ. of Manitoba  Winnipeg, MB  R3E 0J9  (Canada)

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