Zaphod mode support?

Zaphod mode support?

[Rasto Sramek]

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Hello *, 

sorry in case this has been raised many times. Zaphod mode support (In
my understanding one card, one xserver, multiple screens) seems to not 
work in intel drivers anymore. Is that so? 

If yes, are there any plans to re-introduce it? (Or does anyone know of
a way to get this functionality from xrandr?) Up to now I used ati and
nvidia cards and I lack this functionality in intel drivers.
What annoys me most is the inability to change workspaces independently
on the two screens. I can't believe I'm the only one. 

Thanks and best regards, 
Rasto Sramek

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Re: Zaphod mode support?

[Andrew Lutomirski]

On Wed, Oct 6, 2010 at 10:03 AM, Rasto Sramek <rsramek@inf.ethz.ch> wrote:
> Hello *,
>
> sorry in case this has been raised many times. Zaphod mode support (In
> my understanding one card, one xserver, multiple screens) seems to not
> work in intel drivers anymore. Is that so?

AFAICT Zaphod mode is one device but multiple X servers (presumably
used independently by different people).  I think very few drivers
support it these days.

>
> If yes, are there any plans to re-introduce it? (Or does anyone know of
> a way to get this functionality from xrandr?) Up to now I used ati and
> nvidia cards and I lack this functionality in intel drivers.
> What annoys me most is the inability to change workspaces independently
> on the two screens. I can't believe I'm the only one.

The modern approach is one "screen" divided among multiple monitors
using RandR.  I'm not sure what fglrx and nvidia do.

In any case, switching workspaces the way you want would be a feature
of the window manager or compositing manager, not the driver.  If you
use compiz + GNOME, try installing ccsm.  Then look in Desktop Wall /
Viewport Switching and change the "Multimonitor behavior" setting.
(If you're on Fedora and you enable compiz through desktop-effects,
you'll need to modify /usr/bin/compiz-gtk like this:

function runCompiz() {
        gtk-window-decorator &
        if ( [ -e /usr/lib/compizconfig/backends/libgconf.so ] || [ -e
/usr/lib64/compizconfig/backends/libgconf.so ] )
        then
                exec compiz --ignore-desktop-hints ccp $@
        else
                #exec compiz --ignore-desktop-hints glib gconf gnomecompat $@
                exec compiz --ignore-desktop-hints ccp gnomecompat $@
        fi
}

due to a long-standing bug).

If you use metacity or kwin, you'll have to figure it out yourself :)

--Andy

>
> Thanks and best regards,
> Rasto Sramek
>
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Re: Zaphod mode support?

[Rasto Sramek]

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> AFAICT Zaphod mode is one device but multiple X servers (presumably
> used independently by different people).  I think very few drivers
> support it these days.
Well, whatever it is called, I am referring to the configuration when I
have a single X server but multiple screens, like screen0 and screen1. 

> The modern approach is one "screen" divided among multiple monitors
> using RandR.  I'm not sure what fglrx and nvidia do.
Anything can of course use RandR, however at least nvidia drivers
support multiple screens. Afaik intel used to support it as well.
With nvidia one simply declares 2 monitors, and 2 screens. 
> 
> In any case, switching workspaces the way you want would be a feature
> of the window manager or compositing manager, not the driver.  If you
> use compiz + GNOME, try installing ccsm.  Then look in Desktop Wall /
> Viewport Switching and change the "Multimonitor behavior" setting.
> (If you're on Fedora and you enable compiz through desktop-effects,
> you'll need to modify /usr/bin/compiz-gtk like this:

I use fluxbox which needs screen0 and screen1. I know that awesome is
aware of xrandr and can simulate separate screen behavior but I do not
know of other WMs that can do so. The reason I prefer having 
multiple screens is that it is in my view a simple and correct behavior 
which has worked for years. 

Thanks for the quick response!
Best regards, 
Rasto

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Re: Zaphod mode support?

[Andrew Lutomirski]

On Wed, Oct 6, 2010 at 10:50 AM, Rasto Sramek <rsramek@inf.ethz.ch> wrote:
>> AFAICT Zaphod mode is one device but multiple X servers (presumably
>> used independently by different people).  I think very few drivers
>> support it these days.
> Well, whatever it is called, I am referring to the configuration when I
> have a single X server but multiple screens, like screen0 and screen1.
>
>> The modern approach is one "screen" divided among multiple monitors
>> using RandR.  I'm not sure what fglrx and nvidia do.
> Anything can of course use RandR, however at least nvidia drivers
> support multiple screens. Afaik intel used to support it as well.
> With nvidia one simply declares 2 monitors, and 2 screens.
>>
>> In any case, switching workspaces the way you want would be a feature
>> of the window manager or compositing manager, not the driver.  If you
>> use compiz + GNOME, try installing ccsm.  Then look in Desktop Wall /
>> Viewport Switching and change the "Multimonitor behavior" setting.
>> (If you're on Fedora and you enable compiz through desktop-effects,
>> you'll need to modify /usr/bin/compiz-gtk like this:
>
> I use fluxbox which needs screen0 and screen1. I know that awesome is
> aware of xrandr and can simulate separate screen behavior but I do not
> know of other WMs that can do so. The reason I prefer having
> multiple screens is that it is in my view a simple and correct behavior
> which has worked for years.
>

I think any modern WM should support xrandr.  Also, that way you can
drag windows from one screen to the other.

Or you could Google around for Xinerama -- that might help.

--Andy

Re: Zaphod mode support?

[Rasto Sramek]

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On Wed, Oct 06, 2010 at 10:54:53AM -0400, Andrew Lutomirski wrote:
> On Wed, Oct 6, 2010 at 10:50 AM, Rasto Sramek <rsramek@inf.ethz.ch> wrote:
> >> AFAICT Zaphod mode is one device but multiple X servers (presumably
> >> used independently by different people).  I think very few drivers
> >> support it these days.
> > Well, whatever it is called, I am referring to the configuration when I
> > have a single X server but multiple screens, like screen0 and screen1.
> >
> >> The modern approach is one "screen" divided among multiple monitors
> >> using RandR.  I'm not sure what fglrx and nvidia do.
> > Anything can of course use RandR, however at least nvidia drivers
> > support multiple screens. Afaik intel used to support it as well.
> > With nvidia one simply declares 2 monitors, and 2 screens.
> >>
> >> In any case, switching workspaces the way you want would be a feature
> >> of the window manager or compositing manager, not the driver.  If you
> >> use compiz + GNOME, try installing ccsm.  Then look in Desktop Wall /
> >> Viewport Switching and change the "Multimonitor behavior" setting.
> >> (If you're on Fedora and you enable compiz through desktop-effects,
> >> you'll need to modify /usr/bin/compiz-gtk like this:
> >
> > I use fluxbox which needs screen0 and screen1. I know that awesome is
> > aware of xrandr and can simulate separate screen behavior but I do not
> > know of other WMs that can do so. The reason I prefer having
> > multiple screens is that it is in my view a simple and correct behavior
> > which has worked for years.
> >
> 
> I think any modern WM should support xrandr.  Also, that way you can
> drag windows from one screen to the other.
> 
> Or you could Google around for Xinerama -- that might help.
> 
> --Andy

Thanks, but accoding to my searching around, the only non-tiling WM that
supports this is Enlightment. Even compiz plugin suggested by you only
works in multihead mode, which I cannot get with interl driver. 

How would xinerama help me I don't really know. Xinerama is a different
way of causing the problem I want to avoid. 

All the best,
Rasto

(Sorry Andrew for wrong reply-to)

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