Mailinglist Archive: yast-devel (100 mails)

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Re: [yast-devel] Replacement proposal for the current display-manager.service
On Monday 26 January 2015 12:58:29 Jiri Srain wrote:
leaving out YaST, what would be the default workflow for user who just
installs a single desktop manager?

I assume you are talking here about the second proposal. This would mean that
we need to set a default display-manager at installation time. This would be
the same as the current situation. If I now remove GDM and replace it with
KDM, then I need to make changes in the sysconfig area to reflect this. But
the LIVE-cd's would come with a default setup, so this would not change.

How should the validation be done? Have will the mapping between the
device manager and unit file work?

What validation ? The unit files that are being delivered from upstream all
set the alias display-manager.service. So this means that if I install the
SDDM display-manager, the sddm.service unit file is placed in the systemd
directories. When I call systemctl enable sddm.service, then this would create
the display-manager.service pointing to the sddm.service.

What happens if I uninstall (just via plain rpm -e) the currently
selected DM?

Then the start of the display-manager will fail. But this is exactly as what
happens now.

I'm not saying that your proposal is wrong, no way. However, I
definitely want to avoid having "if DM is foo, install package bar" in
the YaST code and I'd like package operations via rpm or zypper produce
expected results.

That was just an example. We could also have YaST detect the installed unit
files to see which display-managers are available on the system. Which would
be a big improvement, as that today I can set whatever command or whichever
display-manager in the sysconfig and the script will try to start it (and of
course if it is not there it will simply fail).

If we want to be fool-proof and that we have predictable results when we
install a display-manager package, then we should go for option 1. Again
today I can install GDM, SDDM, KDM, lightdm all at the same time and still
have a failing system as that in sysconfig I have blabla set as the default

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