On 29/01/2019 10:24, S. Vergani wrote:
> Dear John,
> 
> sorry I forgot to add the this part of your message
> 
>>> This bit of magic, from a recent post, is said to stop that link
>>> getting camouflaged:
>>>
>>> <begin pgp signed message to disable safelinks/>
> 
> was not clear to me.
> 
> Many thanks,
> Stefano
> 
> 
> 
> 
> On 2019-01-29 10:14, S. Vergani wrote:
>> On 2019-01-28 18:40, John Pilkington wrote:
>>> On 28/01/2019 14:10, S. Vergani wrote:
>>>> Dear all,
>>>>
>>>> I am running scientific linux on a ThinkPad t440p. During the past 
>>>> 1.5 years, I have been experiencing the same apparently unsolvable 
>>>> problem with SL 7.5. Every time I closed the pc without locking it 
>>>> or I tried to restart it, the pc froze and the only thing to do was 
>>>> to force shut down. I have been using GNOME classic but with any 
>>>> other desktop as well (I tried them all) the problem persisted.
>>>>
>>>> I upgraded yesterday to SL 7.6 and finally the issue disappeared. 
>>>> This morning I started again the session and SL was back to 7.5. 
>>>> When I start the session (I have windows 7 dual-boot) I can choose 
>>>> only between some versions of SL 7.5 and windows. The aesthetics is 
>>>> then exactly as it was with SL 7.5, but when I check which version I 
>>>> am running it shows SL 7.6. The old issue came back and again it 
>>>> freezes every time.
>>>>
>>>> Could someone help me with the matter? To summarize, the selections 
>>>> during boot phase, the aesthetics, and the old issues of SL 7.5 are 
>>>> back, but I upgraded to SL 7.6 and when I ask for the OS the output is
>>>>
>>>> NAME="Scientific Linux"
>>>> VERSION="7.6 (Nitrogen)"
>>>> ID="scientific"
>>>> ID_LIKE="rhel centos fedora"
>>>> VERSION_ID="7.6"
>>>> PRETTY_NAME="Scientific Linux 7.6 (Nitrogen)"
>>>> ANSI_COLOR="0;31"
>>>> CPE_NAME="cpe:/o:scientificlinux:scientificlinux:7.6:GA"
>>>> HOME_URL="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.scientificlinux.org__&d=DwICAg&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=Aqd5_VH4PlFI7GAYLgL25bt5Og8RNo4gM-d9z9NJh7A&s=QXGDFZ1WCt4tUiw6xnohs8oDWnt_8gJoHiC7vW6ikH8&e=" 
>>>> BUG_REPORT_URL="mailto:[log in to unmask]"
>>>>
>>>> REDHAT_BUGZILLA_PRODUCT="Scientific Linux 7"
>>>> REDHAT_BUGZILLA_PRODUCT_VERSION=7.6
>>>> REDHAT_SUPPORT_PRODUCT="Scientific Linux"
>>>> REDHAT_SUPPORT_PRODUCT_VERSION="7.6"
>>>>
>>>> Many thanks,
>>>> Stefano
>>>
>>> Hi:  In the past people have found that their systems had not properly
>>> upgraded.  I don't know  whether the underlying problems have been
>>> fixed now, but this thread might help:
>>>
>>> https://listserv.fnal.gov/scripts/wa.exe?A2=ind1805&L=SCIENTIFIC-LINUX-USERS&P=13374 
>>>
>>>
>>> This bit of magic, from a recent post, is said to stop that link
>>> getting camouflaged:
>>>
>>> <begin pgp signed message to disable safelinks/>
>>>
>>> The 'overnight' freezes problem really needs logs, or at least some
>>> indication of what processes had been active.  Firefox videos,
>>> perhaps?
>>>
>>> John P
>>
>>
>> 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
> 
Hello Stefano:  I'm not sure if you tried the sequence that I linked in 
my reply:

yum remove yum-conf-sl7x
yum install yum-conf-sl7x
yum clean all
yum update

The link was to the list archives on 15 May last year, and you can view 
the whole thread for the background.  The 'magic' line was intended to 
stop the mailing list scrambling the URL, and it looks as if it worked. 
See the most recent posts in the archive for that.  I must admit that 
the URL with its 'scripts/wa.exe' does look a little unlikely, but you 
can get to the archive via the SL website if you wish.

Otherwise I can only hope that someone else can help.

Good luck,

John