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Description of problem:
Help window in the Kernel & Performance spoke doesn't show any useful information. "URL cannot be shown" is printed.

Version-Release number of selected component (if applicable):
anaconda-21.48.22.131-1.el7
anaconda-user-help-7.5.3-1.el7

How reproducible:
always

Steps to Reproduce:
1. start graphical installation
2. proceed to the "KERNEL & PERFORMANCE" spoke
3. click "Help!"

Actual results:
"URL cannot be shown" is displayed

Expected results:
Help page with relevant information is displayed

Created attachment 1396010 [details]
screenshot

This is a combination of two things:
1) there is no help content for the new spoke - there was simply no time to put it in place
2) bug 1443179, which prevents yelp from opening HTML pages

So basically the help system finds there is no help content for the spoke and correctly falls back to HTML help placeholder, which yelp can apparently no longer open.

The main fix is to create help content for the Kernel & performance spoke.

And then also possibly to convert the placeholder to docbook, so that it is actually displayed correctly when needed (for example hypothetical third party addons that add spokes).

We ended up not shipping this spoke in the end, so help not working in it is moot. Closing this issue.