I noticed in journalctl that gnome-shell was core dumping.
yum reinstall gnome-shell fixed my displays problem.
So I am back to my first premise that the 'yum update' did not complete
properly for some reason.
Is there any way I can check the integrity of the packages installed?
What could cause 'yum upgrade' to say 'Nothing to do' and not
install
the latest 305 kernel?
Alan
--
Alan McRae
On 05/06/2021 15:30, Alan McRae via CentOS wrote:> The yum upgrade from 8.3 to 8.4 on my main machine? looked as if it
> was working fine so I went to have a coffee.
>
> When I came back the screens were blank so I don't know what happened.
> On rebooting the screens are still blank.
>
> I have two graphics cards running three displays.
>
> I have a "rescue" system on the same machine that upgraded from
8.3 to
> 8.4 fine. The 3 screens work fine on this.
>
> I am not sure the upgrade completed properly. For example the new kernel:
>
> ?vmlinuz-4.18.0-305.3.1.el8.x86_64
>
> was not present in /boot. Even worse, "yum upgrade" said there
was
> nothing to do and would not install it. I installed the kernel package
> manually.? /etc/redhat-release says CentOS Linux release 8.4.2105
>
>
> My main question is: Where are the config files for the screen(s).
> This used to be something like /etc/X11/xorg.conf.
>
> Since I have a working rescue system my current plan is to
> compare/copy the config files.
>
> Suggestions please as to where I should start. It is difficult to work
> without a GUI. I have ssh access to the machine.
>
> Thanks
>
> Alan
>