[elrepo] yum-plugin-nvidia breaks systems

[Phil Perry]

On 27/11/2018 19:08, Orion Poplawski wrote:
> On 11/27/18 11:37 AM, Akemi Yagi wrote:
>> On Tue, Nov 27, 2018 at 10:15 AM Orion Poplawski <orion at nwra.com> wrote:
>>>
>>> This morning a laptop without an nVidia card in it installed the following:
>>>
>>> Nov 27 03:42:21 Installed: yum-plugin-nvidia.noarch 1.0.2-1.el7.elrepo
>>> Nov 27 03:46:19 Installed: kmod-nvidia.x86_64 410.78-1.el7_6.elrepo
>>> Nov 27 03:48:22 Installed: nvidia-x11-drv.x86_64 410.78-1.el7_6.elrepo
>>> Nov 27 03:50:43 Installed: nvidia-x11-drv-32bit.x86_64 410.78-1.el7_6.elrepo
>>>
>>> effectively breaking it.  I don't know why they got installed, the system just
>>> did an automatic update via yum-cron.
>>
>> I have no idea why your yum-cron suddenly decided to install those
>> nvidia packages. Do you have any log file to look at? Some package(s)
>> pulled them in???
>>
>> Akemi
> 
> Unfortunately there is no log of the depsolving that went into that
> transaction.  And I cannot reproduce it now by undoing that transaction and
> running and update again - possibly because new updates have arrived in the
> sl-security repo changing the transaction.
> 
> I'll also note that on one system with the nvidia driver already installed, it
> decided to install nvidia-x11-drv-32bit.x86_64 as well.
> 
> I can only think that it decided that it was a better fit for something like
> libEGL.so.1 than mesa-libEGL was.
> 
> 

It's almost certainly nvidia-x11-drv that has caused the issue, and in 
turn pulled in kmod-nvidia and yum-plugin-nvidia as dependencies.

Please could you show the output from:

rpm -q --whatrequires nvidia-x11-drv

I think you are right above. The current nvidia-x11-drv package provides 
a number of components that are also provided on rhel7.6 by libglvnd* 
and mesa-libGL, mesa-libEGL and mesa-libGLES packages.

Yum isn't fussy what package meets a dependency, so long as it is met. 
My guess is yum has chosen nvidia-x11-drv to meet a dependency that 
should have been met by one/some of the packages above.

If you try to 'yum erase nvidia-x11-drv' and look at the packages being 
removed for dependencies, that may give you a clue but initially I would 
be looking at the packages above (don't follow through if it's going to 
uninstall half the system!). The 'rpm' command above should also provide 
you with some clues what pulled it in.

Assuming we are correct above, this should be fixed in the next release 
- sorry for the inconvenience.

Phil