Hi Lukas,
*On computers with dual video cards (or with external video output), as
well as with multiple video cards*
In regard to the above, I think what you intend to say is: "On computers
with video-out capability, as well as with multiple video cards...", or
something like that. As it reads now, "dual video cards" and "multiple
video cards" are a way of saying the same thing; the "dual" implies two
cards, where the "multiple" implies more-than-one card. I hope that makes
it clearer.
In all, I am skeptical that blocking a release based off of video-out
working is worth having. If one monitor works, be that the integrated
monitor in a laptop, or a single display connected to a desktop, I think
that's enough to have a basic user experience and have the ability to
submit a bug report. However, I do see your point when you say that you
believe that a mature system like Fedora should have multiple-display
capability; I agree with this. From my past experience, I know that
graphics driver issues (noveau, nVidia, etc) can render the entire graphics
ability unable to work in some fashion, and being that Fedora is not the
direct maintainer of these drivers, I wonder how long it would take to get
a fix should this occur in the wild.
I can appreciate the more conservative of the two criteria; my
interpretation of what you have written there is that any computer with one
video card that has video-out capability must work. Between the two, I
would pick this one. Having to test all of the different outputs on a
system with more than one video card would be extremely tedious and I
believe a corner case.
Geoff Marr
IRC: coremodule
On Tue, Mar 30, 2021 at 10:08 AM Lukas Ruzicka <lruzicka(a)redhat.com> wrote:
Thanks for your view.
On Tue, Mar 30, 2021 at 3:45 PM Richard Ryniker <ryniker(a)ryniker.org>
wrote:
>
> desktops to work with multiple displays on erery architecture. It is
> desirable, yes, but this sounds like a QA attempt to control development.
>
No, this is not a QA attempt to control development. This is a reaction to
a bug proposal that
aspires to become a blocker for Fedora 34 Final (see
https://bugzilla.redhat.com/show_bug.cgi?id=1942175).
Actually, behaviour like that does not violate any criteria, so
theoretically there is no way how this could
block the release, but we somehow feel (at least I do) that such behaviour
is a nasty thing and should not
happen on a mature system which I believe Fedora is.
>
> Your criterion should be limited to hardware that works in single display
> configurations.
>
> I think two displays is a reasonable limitation. Even with that, test
> coverage will be extremely sparse - there are just too many devices to
> make tests of different combinations practical. (If we cannot test it,
> we should not claim a release meets a criterion.)
>
I agree, therefore my conservative criterion only suggests dual video
cards (I hope
I have understood the term correctly and dual video cards are cards that
enable two monitors)
or an external monitor output (like a laptop would have).
You probably would agree that one external device (in case of a laptop) or
two monitors (in case of a desktop)
is a reasonable expectation where people need to connect projectors,
external monitors, etc.
>
> If I can install three graphics adapters in a machine, and each supports
> four displays, would you require that I can run 12 displays on each
> desktop? Lovely if it works, but too rare a use case to be a blocker, or
> even to test on a regular basis.
>
That is why I have put the draft here to collect views and suggestions, so
if you believe you could help
with the exact wording to exclude the above situation, please go ahead.
Thanks, Lukas
>
> Slots capable of driving a graphics adapter are very limited, but what
> about USB devices? With a few hubs, I could connect scores of displays,
> and your criterion asserts they will work.
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--
Lukáš Růžička
FEDORA QE, RHCE
Red Hat
<
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