Dear all,
the problem I have is software dependent, but I don't understand why and how.
I have the same problem with *buntu 14.04 but not with Debian 7 and 8. I have
the same problem with different hardware.
The problem:
When booting a laptop that is connected to a projector (=dual monitor),
monitors show different resolutions, and the laptop shows the wrong one.
I know how to fix the resolution with RandR, however this is not what I'm
looking for. I can use RandR only after entering the desktop environment, and
quick adjustments are possible only with a projector I already know and used
before. In my profession I often have to use a projector I don't know, and
which I cannot test before using.
After booting, the monitor of the projector shows the full desktop, but the
laptop only part of it (the upper left corner, to be precise). Best solution
would be that both monitors show the same resolution after booting. Second
best solution would be that the laptop shows the full desktop, because it
would make it easier to adjust the resolution quickly.
Most remarkable:
Debian does it right out of the box, Wheezy as well as Jessie. The problem
with *buntu-based distributions is neither desktop-specific nor hardware
dependent, i.e., the problem appears under Gnome, LXDE and KDE and with
different laptops.
So, my question finally could be boiled down to: what does Debian differently
from Trisquel, and is there a way to make Trisquel behaving the same way as
Debian?
Thanks for any helpful comment.