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So, I tried following these steps, using both the 18.40 and the 18.50 archive from AMD:
- Start YaST2, with the help of menu - Click Software Repositories in the YaST Control Center - Click Add, select "Local directory" and click Next - Enter the path to directory (e. g. /tmp/amdgpu-pro-18.40-673869) and choose a name (AMD for example) for the repository - Click OK - Accept the repository gpg key - Ensure its status is "enabled" and "refresh automatically" is also on
When adding the repository, YaST complains like this:
The file repomd.xml from repository AMDGPU-PRO dir:/home/dario/Downloads/amdgpu-pro-18.50-756340-sle-15 is not digitally signed. The origin and integrity of the file cannot be verified. Using the file anyway puts the integrity of your system at risk. Use it anyway?
And if I say 'Yes', then, when trying to install one of the packages, I see:
Retrieving package amdgpu-core-18.50-756340.noarch (1/2), 7,6 KiB ( 7,6 KiB unpacked) amdgpu-core-18.50-756340.noarch.rpm: Package is not signed! amdgpu-core-18.50-756340.noarch (AMDGPU-PRO): Signature verification failed [6-File is unsigned] Abort, retry, ignore? [a/r/i] (a):
So, basically, there's no "Accept the repository gpg key" phase, and there are complaints about unsigned packages.
I appreciate that this is, most likely, not an issue, and that it's more a problem of AMD's archive than an openSUSE's one.
Nevertheless, I think the guide in this page should mention these issues, as well as recommend/guide the user toward what's best to answer to these questions.