Re: [SLE] 10.0 external monitor at different resolution

Matthias Hopf schrieb:
On Sep 15, 06 10:26:23 +0200, Siegbert Baude wrote:

A good talk is given with your back to the board and your front to the
audience, therefore you have to look at your laptop display. I know the

Ok, finally we have the use case. I was thinking of a completely
different setup.

Good to know, I will be more precise in the future. :-)

IMHO for talks our solution is pretty ok. In fact, talks were the
driving force behind our decisions. Projectors typically have 1024x768,
and there's almost no laptop with less than 1024x768 on its internal
display.
-> Do a standard configuration with cloned external monitor, and
hand-select the 1024x768 resolution for the talk.

I do that all the time.

Yes, that is a working solution, but not using the native resolution of
your laptop, which is what I was looking for. With modern laptop
displays and resolutions of 1600x1200 and above, scaling is not a good
solution.

panning solution, but it is not good for giving a talk, if you have to
scroll to see the complete content for your screen. So it perfectly does
make sense, but you have to render the contents two times, once for each
resolution, so you can't use the same framebuffer. How you should deal

What you're asking for is application support. To the best of my
knowledge *no* application on linux has support for something like that
right now.
On MacOS this is different, of course.

Interesting, that of course would be an alternative approach. Do I
undertand you correct that you're talking about Xinerama, i.e.
non-cloned display content, where the application is just using two
separate windows for the presentation, one for each screen? This would
be even better as the application could show different versions (one
with comments for the speaker, one without for the audience). A pity
this software doesn't exist yet.

with different aspect ratios of displays is however unclear. Scaling
horizontally seems to be the only way to go then.

I don't give a damn, if the aspect is wrong on my laptop's display
during a talk. I'm also not interested about the quality of the display
of the laptop, as you're standing in front of your laptop, and cannot
visualize single pixels at all due to the distance.

We're different then in this point. I want a crispy display also for the
speaker. Maybe this depends on how often you give your speech and
therefore know the contents already by heart. Next point could be the
size of the room and therefore different distances to the display. Seems
you just want to recognize, which *** is displayed, whereas I would
like to be able to actually read even smaller fonts.

The problem is not sax, but code implementations. At least X.org drivers
simply don't allow it yet. I don't know if some of the proprietary
drivers can do it.

?
Xinerama and multidisplay setups work with all (maybe except intel under
some circumstances) drivers with different resolutions.

Yes, but they don't show cloned display content, which is what is needed
as long as the applications cannot use both displays for the
presentation. So as long as this feature is missing, I would like to
have cloned displays, both in there native resolution, which means the
content has to be rendered twice, once for each display. Windows drivers
for some laptop graphic chips allow this, but I don't know of a single
solution to make this happen with Linux. IMHO, this is due to the x.org
drivers not allowing this.

Ciao
Siegbert

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