Re: Separate X Screens - possible on Intel Integrated HD Graphics?

2016-01-17 Thread Michal Suchanek
On 16 January 2016 at 23:18, Ken Taylor  wrote:
> On 01/16/2016 01:31 PM, Boudhayan Gupta wrote:
>>
>> Hi Ken and all,
>>
>>> I appreciate all of the input folks are providing. However, I asked the
>>> simple question if separate X screens could be configured on Intel
>>> integrated graphics.  The discussion seems to have degenerated into "you
>>> don't want to do" what I wish to do and "you should try something else."

The usual pattern is that people ask about multiple screens but do not
really want them. Having multiple screens only limits what you can do
and gives you no meaningful benefits.

>>
>> There are legitimate use cases for this. I suspect Ken wants to do
>> something like running a completely different X session on a second
>> monitor.
>>
>> What you're looking for is Zaphod mode. There *is* a configuration
>> option for this, but I have no idea whether the code paths are bug
>> free or even implemented.
>>
>> An example for using Zaphod mode with nouveau is here at
>> http://nouveau.freedesktop.org/wiki/MultiMonitorDesktop/. The same
>> configuration tweaked for the intel driver should work.
>>
>> -- Boudhayan
>>
> I took the example xorg.conf in the link you provided and made these
> changes:
>
> Changed Driver to "intel" from "nouveau"
> Changed the BusID to "PCI:0:2.0" as obtained from lspci
> Set the actual connectors:
>Option  "ZaphodHeads" "DP-1"
>Option  "ZaphodHeads" "HDMI-A-1"
>

You should probably check with xrandr what outputs you have. The
output names vary between different drivers.

Also you should look at the /var/log/Xorg.0.log for full X server output.

HTH

Michal
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Re: Separate X Screens - possible on Intel Integrated HD Graphics?

2016-01-17 Thread rhkramer
On Sunday, January 17, 2016 08:10:38 AM you wrote:
> The usual pattern is that people ask about multiple screens but do not
> really want them. Having multiple screens only limits what you can do
> and gives you no meaningful benefits.

On my previous system (which I used for about 5 years) I used multiple screens 
(driven by an NVidia card) to great benefit.  My current system (started using 
about 6 months ago) has a 32" monitor so I no longer feel the need for 
multiple screens.

On some of the industrial (process control) systems I've been responsible for, 
we put up to 4 monitors (with different displays) driven by one computer in 
front of a single operator.

I have to admit that the Linux / X window (and successor) terminology 
confurses me--when I say multiple screens, I mean multiple monitors driven by 
a single PC and different content on each, and, ideally (but not always the 
case) the ability to move content between displays and copy and paste to and 
from each.

To say that nobody can get any meaningful benefits from multiple screens (or 
from anything else) implies a degree of omniscience (sp?) that I'm not sure 
you have.

I probably should have written this and filed it in my drafts folder, but 
sometimes I don't do what is best for myself.  ;-)
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Re: Separate X Screens - possible on Intel Integrated HD Graphics?

2016-01-17 Thread Ken Taylor

On 01/17/2016 10:05 AM, rhkra...@gmail.com wrote:

On Sunday, January 17, 2016 08:10:38 AM you wrote:

The usual pattern is that people ask about multiple screens but do not
really want them. Having multiple screens only limits what you can do
and gives you no meaningful benefits.

On my previous system (which I used for about 5 years) I used multiple screens
(driven by an NVidia card) to great benefit.  My current system (started using
about 6 months ago) has a 32" monitor so I no longer feel the need for
multiple screens.

On some of the industrial (process control) systems I've been responsible for,
we put up to 4 monitors (with different displays) driven by one computer in
front of a single operator.

I have to admit that the Linux / X window (and successor) terminology
confurses me--when I say multiple screens, I mean multiple monitors driven by
a single PC and different content on each, and, ideally (but not always the
case) the ability to move content between displays and copy and paste to and
from each.

To say that nobody can get any meaningful benefits from multiple screens (or
from anything else) implies a degree of omniscience (sp?) that I'm not sure
you have.

I probably should have written this and filed it in my drafts folder, but
sometimes I don't do what is best for myself.  ;-)
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Thanks rhkramer,

I appreciate the vote of confidence.  Perhaps "separate X screens" is 
something which only a small percentage of user are multi-tasking enough 
to take advantage of. However, I am one of them. I do appreciate 
assistance and suggestions from other users as to how to accomplish what 
I am working on.  I do not necessarily appreciate being told I do not 
want to do what I want to do.


As to a HUGE monitor... I had thought about that. I could run 4 virtual 
machines each taking up 1/4 of the display.  But I just purchases two 
nice Dell 24" Ultrasharp 19:10 aspect ratio monitors. The left one is 
vertical and the right one horizontal. The vertical one is usually 
divided in half - Thunderbird on the top half and a virtual machine 
connected to my secure email at protonmail.ch on the bottom. I call up 
Firefox when I need it over top of the two or I may switch to another 
workspace first. On the right monitor I often have several things going 
on 3 or 4 workspaces.


Ken
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Re: Separate X Screens - possible on Intel Integrated HD Graphics?

2016-01-17 Thread Liam R. E. Quin
On Fri, 2016-01-15 at 17:46 -0500, Ken Taylor wrote:
> Separate X screens gives me EXACTLY what I am after. That is why I
> asked the question.  Please see this page: 
> http://jsmylinux.no-ip.org/basic-information/dual-monitors/ and have 
> a 
> look towards the bottom titled "Individual Panels".

It seems to me a reasonable thing to want. I used to use a similar
setup years ago on Sun hardware. But as far as I can tell the driver
for the Intel integrated graphics doesn't support multiple X screens in
that way. The NVidia driver does, but (of course) only for an NVidia
graphics card. On the other hand,
https://help.ubuntu.com/community/XineramaHowTo
has a configuration using xinerama and an intel card, so it may depend
on the exact card you have (and I think in that case they're trying to
get to a single desktop with multiple monitors, but disabling xinerama
mode may get you closer to what you want).

It might be easier to buy an NVidia or ATI graphics card (after
checking for support)... which is even possible on some laptops.

Liam

-- 
Liam R. E. Quin 
Words and Pictures from Old Books - http://www.fromoldbooks.org/

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Re: Separate X Screens - possible on Intel Integrated HD Graphics?

2016-01-17 Thread Ken Taylor

On 01/17/2016 06:25 PM, Liam R. E. Quin wrote:

On Fri, 2016-01-15 at 17:46 -0500, Ken Taylor wrote:

Separate X screens gives me EXACTLY what I am after. That is why I
asked the question.  Please see this page:
http://jsmylinux.no-ip.org/basic-information/dual-monitors/ and have
a
look towards the bottom titled "Individual Panels".

It seems to me a reasonable thing to want. I used to use a similar
setup years ago on Sun hardware. But as far as I can tell the driver
for the Intel integrated graphics doesn't support multiple X screens in
that way. The NVidia driver does, but (of course) only for an NVidia
graphics card. On the other hand,
https://help.ubuntu.com/community/XineramaHowTo
has a configuration using xinerama and an intel card, so it may depend
on the exact card you have (and I think in that case they're trying to
get to a single desktop with multiple monitors, but disabling xinerama
mode may get you closer to what you want).

It might be easier to buy an NVidia or ATI graphics card (after
checking for support)... which is even possible on some laptops.

Liam


Thanks Liam,

I will see what I can determine from the link you provided.  From what I 
have read about Xinerama it is intended to put multiple screens back 
together - for example if they are on two discrete video cards - not to 
break one card into two screens.  Still, there is an Intel specific 
xorg.conf example which I will study.


As to purchasing a discrete card... I would certainly do that for a 
"real" PC or workstation.  In fact I just replaced the obsolete Nvidia 
card which came in my Dell Studio XPS 8000 with a Quadro K420.  It runs 
two 24" monitors separately just fine. The Inspiron 3050s are tiny toys 
- sort of like the Intel NUC. No room for ANY expansion. However, as 
they have two monitor connections... sort of a challenge. And 
considering that most processors Intel makes these days contain 
graphics... I hate to have to pay more for a Xeon just to avoid the 
built in graphics - sort of like having to pay for Windoze on a PC I 
plan to run Linux on :-(


Regards,

Ken
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Re: Separate X Screens - possible on Intel Integrated HD Graphics?

2016-01-17 Thread Keith Packard
Ken Taylor  writes:

> I appreciate the vote of confidence.  Perhaps "separate X screens" is 
> something which only a small percentage of user are multi-tasking enough 
> to take advantage of.

As you know, in X, a "screen" is a pretty central abstraction, with
Windows, Pixmaps and other graphics resources all specified in relation
to a single "screen". You can't mix-n-match resources between screens,
leading to the inability to move windows between them.

Over the years, we've substituted that with a similar notion which
offers functionality more similar to other window systems, the 'one
screen, many monitors' plan as first implemented in PanoramiX (now
Xinerama) and then RandR.

Here's the differences I can think of between the 'one screen, many
monitors' and 'many screens, one monitor each' configurations. If you've
got others, I'd love to hear them.

One screen, many monitors (Xinerama/RandR):

* Move windows among monitors freely
* Add/remove monitors on the fly

Many screens, one monitor each (core X):

* Specify which monitor an application will appear on via the
  command line (or environment variable).

In both:

* Resize monitors on the fly
* Configure the desktop on each monitor separately
* Specify the initial monitor setup in config files.

As far as video driver support, the internal server support for multiple
"screens" on a single graphics device is twisty, and very few people
ever bother to test these setups. It's possible that it will be broken
on your favorite card at some point.

You can probably understand that supporting both of these models is
extra work for all of the developers, and it would be nice if we could
make a single model work for most people.

-- 
-keith


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Re: Separate X Screens - possible on Intel Integrated HD Graphics?

2016-01-17 Thread Michal Suchanek
On 17 January 2016 at 17:49, Ken Taylor  wrote:
> On 01/17/2016 10:05 AM, rhkra...@gmail.com wrote:
>>

> Thanks rhkramer,
>
> I appreciate the vote of confidence.  Perhaps "separate X screens" is
> something which only a small percentage of user are multi-tasking enough to
> take advantage of. However, I am one of them. I do appreciate assistance and
> suggestions from other users as to how to accomplish what I am working on.
> I do not necessarily appreciate being told I do not want to do what I want
> to do.
>
> As to a HUGE monitor... I had thought about that. I could run 4 virtual
> machines each taking up 1/4 of the display.  But I just purchases two nice
> Dell 24" Ultrasharp 19:10 aspect ratio monitors. The left one is vertical
> and the right one horizontal. The vertical one is usually divided in half -
> Thunderbird on the top half and a virtual machine connected to my secure
> email at protonmail.ch on the bottom. I call up Firefox when I need it over
> top of the two or I may switch to another workspace first. On the right
> monitor I often have several things going on 3 or 4 workspaces.

Well, I use multiple monitors with single X screen in pretty much the
same way - except I can put any of the virtual desktops on any of the
monitors.

Since you have one portrait and one landscape monitor moving the
virtual desktops between the two will probably not be flawless. Still
that does not mean you need to configure the X server in such a way it
is impossible - you can just not do it.

As has been pointed out the Zaphod options should give you multiple X
screens but since next to nobody uses these there may be issues. In
fact, the very article you linked lists multiple issues when using
multiple monitors with separate screens.

Thanks

Michal
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Re: Separate X Screens - possible on Intel Integrated HD Graphics?

2016-01-17 Thread Felix Miata
Ken Taylor composed on 2016-01-17 11:49 (UTC-0500):

> Ultrasharp 19:10 aspect ratio

Typo, right? If not, what's the model number?
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/
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