Re: two graphics cards and two monitors

[Eric S Fraga]

On Thursday, 16 Nov 2017 at 08:45, Don Armstrong wrote:

[...]

> I *think* you should be able to use Reverse PRIME if you do the
> following:
>
> xrandr --setprovideroutputsource 1 0;
>
> and then xrandr --query; should show the other source.

Not sure what Reverse PRIME means but, in any case, your suggestion
worked perfectly!  I can now access all three screens perfectly.  

DVI-I-1 connected primary 1920x1200+0+0
DP-1 connected 3840x1600+1920+0
HDMI-1-1 connected 1280x1024+5760+0

Now getting a bit of a tennis neck, mind you... :-)

Thanks for all your help.

-- 
Eric S Fraga via Emacs 27.0.50


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Re: two graphics cards and two monitors

[Eric S Fraga]

On Thursday, 16 Nov 2017 at 08:45, Don Armstrong wrote:

[...]

> I *think* you should be able to use Reverse PRIME if you do the
> following:
[+]
>
> xrandr --setprovideroutputsource 1 0;
>
> and then xrandr --query; should show the other source.

I'll give this a try next week (travelling again unfortunately) and will
report back.  Many thanks!

-- 
Eric S Fraga via Emacs 27.0.50


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Re: two graphics cards and two monitors

[Don Armstrong]

On Wed, 15 Nov 2017, Eric S Fraga wrote:
> I have done the above: removed xorg.conf and placed a copy of the log
> file at:
> 
> http://www.ucl.ac.uk/~ucecesf/tmp/xorglog.txt

Perfect.

> The output of xrandr is:
> 
> $ xrandr --listproviders
> Providers: number : 2
> Provider 0: id: 0xc3 cap: 0x7, Source Output, Sink Output, Source Offload 
> crtcs: 4 outputs: 2 associated providers: 0 name:nouveau
> Provider 1: id: 0x64 cap: 0x7, Source Output, Sink Output, Source Offload 
> crtcs: 2 outputs: 3 associated providers: 0 name:nouveau

Awesome; X is seeing and reporting both cards, and then have Source/Sink
output support.

> but only two monitors are found/configured.

I *think* you should be able to use Reverse PRIME if you do the
following:

xrandr --setprovideroutputsource 1 0;

and then xrandr --query; should show the other source.

[The last time I did this setup, I was using multiple displays to do the
multiple monitor setup.]

> > In theory, you should also be using KML, which should configure all
> > of the outputs fairly early in boot as well.
> 
> Any pointers on how to do this would be welcome.

Assuming you aren't setting any kernel options, it should be the default now.


-- 
Don Armstrong  https://www.donarmstrong.com

Nearly all men can stand adversity, but if you really want to test his
character, give him power.
 -- Abraham Lincoln

Re: two graphics cards and two monitors

[Eric S Fraga]

On Wednesday, 15 Nov 2017 at 05:15, Felix Miata wrote:
> Eric S Fraga composed on 2017-11-03 14:22 (UTC):
>
>> I am trying to get a similar system configure with Debian testing/buster
>> and not getting anywhere beyond having two monitors on a single card
>> recognised. 

Hello Felix,

thanks for your response.  I will try some of your suggestions
later.  Some are not possible or I wish to put off trying due to (a)
logistics (distance between display and computer, cabling restrictions)
and (b) requiring IT support to access hardware...

Some specific responses:

> Is this a first try (has this ever worked before trying with Buster)?

This particular configuration has never been tried before as it's a new
computer so the Quadro K620 graphics card is new.  However, my previous
system which this replaces had two Dell 24" monitors attached to the
graphics card that came with that previous computer along with the
GeForce 210 connected via HDMI to my 60" display.  But that system used
the nvidia proprietary driver, not nouveau.

I am trying to resist using the nvidia driver but that will very likely
be my next port of call...

> To be clear, both are PCIe cards, neither is onboard or integrated in the CPU
> package?

Separate cards.

> 4-Can you get output on two displays if you remove the Quadro (IOW, will the
> GeForce work at all)?

As noted above, the GeForce has worked just fine before but with nvidia
driver, not nouveau.  There are two displays attached to the Quadro and
only one to the GeForce.

Thanks again,
eric

-- 
: Eric S Fraga
: in Emacs 27.0.50 + Gnus v5.13 + evil-git-5d040cd
: BBDB version 3.1.2 (2017-01-30 14:47:26+00:00)


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Re: two graphics cards and two monitors

[Felix Miata]

Eric S Fraga composed on 2017-11-03 14:22 (UTC):

> I am trying to get a similar system configure with Debian testing/buster
> and not getting anywhere beyond having two monitors on a single card
> recognised. 

Is this a first try (has this ever worked before trying with Buster)?

> I have three monitors, two on first card and 1 on second
> card.  Only the ones of the first card are getting managed by
> Xorg.  Although the second card and associated monitor are found by
> Xorg, I cannot seem to get Xorg to configure and actually use this third
> monitor.

> Details follow:

> $ dpkg --list '*nouveau*'
> libdrm-nouveau2:amd642.4.84-2 
> xserver-xorg-video-nouveau   1:1.0.15-2   

> $ lspci | grep VGA
> 03:00.0 VGA compatible controller: NVIDIA Corporation GM107GL [Quadro K620] 
> (rev a2)
> 04:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 210] 
> (rev a2)

To be clear, both are PCIe cards, neither is onboard or integrated in the CPU
package?

> $ uname -a
> Linux xxx 4.13.0-1-amd64 #1 SMP Debian 4.13.4-2 (2017-10-15) x86_64 GNU/Linux

> Selected lines from Xorg.0.log:

> [  3877.659] (--) NOUVEAU(0): Chipset: "NVIDIA NV117"
> [  3877.659] (II) NOUVEAU(0): Creating default Display subsection in Screen 
> section
> [...]
> [  3877.693] (II) NOUVEAU(0): Output DVI-I-1 using monitor section rotated
> [...]
> [  3877.768] (II) NOUVEAU(0): Monitor name: DELL U2412M
> [...]
> [  3877.783] (II) NOUVEAU(0): Monitor name: DELL U3818DW
> [...]
> [  3877.783] (II) NOUVEAU(0): Output DVI-I-1 connected
> [  3877.783] (II) NOUVEAU(0): Output DP-1 connected
> [...]
> [  3877.783] (--) NOUVEAU(G0): Chipset: "NVIDIA NVA8"
> [...]
> [  3877.795] (II) NOUVEAU(G0): Output DVI-I-1-2 using monitor section rotated
> [  3877.851] (II) NOUVEAU(G0): Output HDMI-1-1 has no monitor section
> [  3877.862] (II) NOUVEAU(G0): Output VGA-1-1 has no monitor section
> [...]
> [  3878.010] (II) NOUVEAU(G0): Monitor name: SHARP HDMI

> but then nothing is connected to this monitor or this monitor is not
> connected to anything...  The strange thing is that the output says that
> output DVI-I-1-2 will use the "rotated" monitor section which has
> already been assigned to the DVI-I-1 output.

> I can post Xorg.0.log as well as my current xorg.conf if anybody is
> interested.  Without an xorg-conf at all, I get the same effective
> behaviour: two monitors working but third one ignored.

> Any suggestions welcome.

Things I would try:

1-Purge xserver-xorg-video-nouveau (IOW, does default modesetting driver find
three connected displays?).

2-Check if a Knoppix boot generates similar failure.

3-Swap the two cards between PCIe slots.

4-Can you get output on two displays if you remove the Quadro (IOW, will the
GeForce work at all)?

5-Try a DVI cable type with the GeForce/Sharp if the Sharp has a DVI port.

6-Try the GeForce with a DVI-to-HDMI adapter and HDMI cable.

7-Try a different HDMI port on the Sharp if it has more than one.

8-Report http://www.ucl.ac.uk/~ucecesf/tmp/xorglog.txt and failure on one of the
lists devoted to Xorg hardware issues, such as xorg-de...@lists.x.org or
x...@freedesktop.org.
-- 
"Wisdom is supreme; therefore get wisdom. Whatever else you
get, get wisdom." Proverbs 4:7 (New Living Translation)

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

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

Re: two graphics cards and two monitors

[Eric S Fraga]

On Tuesday, 14 Nov 2017 at 10:31, Don Armstrong wrote:
> On Tue, 14 Nov 2017, Eric S Fraga wrote:
>> On Friday,  3 Nov 2017 at 11:19, Don Armstrong wrote:
>> > What happens if you run xrandr --output DVI-I-1-2 --auto; ?
>
>> 
>> $ xrandr --output DVI-I-1-2 --auto
>> warning: output DVI-I-1-2 not found; ignoring
>
> This looks like xrandr isn't seeing the second card at all. In *theory*,
> nouveau should be able to do multicard with these video cards. However,
> it's possible that your xorg.conf is making that not work properly.
>
> Can you move your xorg.conf away, restart X, put your Xorg.0.log up
> somewhere, and run xrandr --listproviders; once X has started?

I have done the above: removed xorg.conf and placed a copy of the log
file at:

http://www.ucl.ac.uk/~ucecesf/tmp/xorglog.txt

The output of xrandr is:

$ xrandr --listproviders
Providers: number : 2
Provider 0: id: 0xc3 cap: 0x7, Source Output, Sink Output, Source Offload 
crtcs: 4 outputs: 2 associated providers: 0 name:nouveau
Provider 1: id: 0x64 cap: 0x7, Source Output, Sink Output, Source Offload 
crtcs: 2 outputs: 3 associated providers: 0 name:nouveau

but only two monitors are found/configured.

> In theory, you should also be using KML, which should configure all of
> the outputs fairly early in boot as well.

Any pointers on how to do this would be welcome.

Thanks,
eric


-- 
: Eric S Fraga
: in Emacs 27.0.50 + Gnus v5.13 + evil-git-5d040cd
: BBDB version 3.1.2 (2017-01-30 14:47:26+00:00)


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Re: two graphics cards and two monitors

[Don Armstrong]

On Tue, 14 Nov 2017, Eric S Fraga wrote:
> On Friday,  3 Nov 2017 at 11:19, Don Armstrong wrote:
> > What happens if you run xrandr --output DVI-I-1-2 --auto; ?
> 
> $ xrandr --output DVI-I-1-2 --auto
> warning: output DVI-I-1-2 not found; ignoring

This looks like xrandr isn't seeing the second card at all. In *theory*,
nouveau should be able to do multicard with these video cards. However,
it's possible that your xorg.conf is making that not work properly.

Can you move your xorg.conf away, restart X, put your Xorg.0.log up
somewhere, and run xrandr --listproviders; once X has started?

In theory, you should also be using KML, which should configure all of
the outputs fairly early in boot as well.

-- 
Don Armstrong  https://www.donarmstrong.com

There is no mechanical problem so difficult that it cannot be solved
by brute strength and ignorance.
 -- William's Law

Re: two graphics cards and two monitors

[Eric S Fraga]

On Friday,  3 Nov 2017 at 11:19, Don Armstrong wrote:
> On Fri, 03 Nov 2017, Eric S Fraga wrote:
>> I am trying to get a similar system configure with Debian testing/buster
>> and not getting anywhere beyond having two monitors on a single card
>
>> recognised.  I have three monitors, two on first card and 1 on second
>> card.  Only the ones of the first card are getting managed by
>> Xorg.  Although the second card and associated monitor are found by
>> Xorg, I cannot seem to get Xorg to configure and actually use this third
>> monitor.
>
> What does the output of xrandr; look like?

Thanks for your response.  Sorry for delay in getting back to you but I
was away on business trip.

$ xrandr
Screen 0: minimum 320 x 200, current 5760 x 1600, maximum 16384 x 16384
DVI-I-1 connected primary 1920x1200+0+0 (normal left inverted right x axis y 
axis) 518mm x 324mm
   1920x1200 59.95*+
   1920x1080 60.00  
   1600x1200 60.00  
   1680x1050 59.88  
   1280x1024 60.02  
   1280x960  60.00  
   1024x768  60.00  
   800x600   60.32  
   640x480   59.94  
   720x400   70.08  
DP-1 connected 3840x1600+1920+0 (normal left inverted right x axis y axis) 
880mm x 367mm
   3840x1600 59.99*+
   2560x1440 59.95  
   1920x1600 59.95  
   2560x1080 59.98  
   1920x1080 60.0050.0059.94  
   1920x1080i60.0050.0059.94  
   1600x1200 60.00  
   1280x1024 75.0260.02  
   1280x800  59.81  
   1152x864  75.00  
   1280x720  60.0050.0059.94  
   1024x768  75.0360.00  
   800x600   75.0060.32  
   720x576   50.00  
   720x576i  50.00  
   720x480   60.0059.94  
   720x480i  60.0059.94  
   640x480   75.0060.0059.94  
   720x400   70.08  

> What happens if you run xrandr --output DVI-I-1-2 --auto; ?

$ xrandr --output DVI-I-1-2 --auto
warning: output DVI-I-1-2 not found; ignoring

>> I can post Xorg.0.log as well as my current xorg.conf if anybody is
>> interested. Without an xorg-conf at all, I get the same effective
>> behaviour: two monitors working but third one ignored.
>
> Also, is there any reason why you're defining a monitor section in your
> xorg.conf? [If your displays are just rotated, you'd be better off
> issuing xrandr commands to run the rotation immediately upon login or
> similar, IMO. Or using autorandr or similar.]

Yes, but without it (and with it as well but I was hoping...), the extra
monitor is not found at all.

thanks,
eric

-- 
: Eric S Fraga
: in Emacs 27.0.50 + Gnus v5.13 + evil-git-5d040cd
: BBDB version 3.1.2 (2017-01-30 14:47:26+00:00)


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Re: two graphics cards and two monitors

[Don Armstrong]

On Fri, 03 Nov 2017, Eric S Fraga wrote:
> I am trying to get a similar system configure with Debian testing/buster
> and not getting anywhere beyond having two monitors on a single card
> recognised.  I have three monitors, two on first card and 1 on second
> card.  Only the ones of the first card are getting managed by
> Xorg.  Although the second card and associated monitor are found by
> Xorg, I cannot seem to get Xorg to configure and actually use this third
> monitor.

What does the output of xrandr; look like?

What happens if you run xrandr --output DVI-I-1-2 --auto; ?

> I can post Xorg.0.log as well as my current xorg.conf if anybody is
> interested. Without an xorg-conf at all, I get the same effective
> behaviour: two monitors working but third one ignored.

Also, is there any reason why you're defining a monitor section in your
xorg.conf? [If your displays are just rotated, you'd be better off
issuing xrandr commands to run the rotation immediately upon login or
similar, IMO. Or using autorandr or similar.]

-- 
Don Armstrong  https://www.donarmstrong.com

Le temps est un grand maître, dit-on; le malheur est qu'il soit un
maître inhumain qui tue ses élèves.
Time is a great teacher, but unfortunately it kills all its pupils.
 -- Hector Berlioz

Re: two graphics cards and two monitors

[Eric S Fraga]

On Sunday,  1 Jan 2017 at 22:03, jurek wrote:
> How to use two graphics cards and two monitors on nouveau driver.I
> have Nvidia gtx 650 ti boost and Nvidia gt 240 card.

Did you get anywhere with this?

I am trying to get a similar system configure with Debian testing/buster
and not getting anywhere beyond having two monitors on a single card
recognised.  I have three monitors, two on first card and 1 on second
card.  Only the ones of the first card are getting managed by
Xorg.  Although the second card and associated monitor are found by
Xorg, I cannot seem to get Xorg to configure and actually use this third
monitor.

Details follow:

$ dpkg --list '*nouveau*'
libdrm-nouveau2:amd642.4.84-2 
xserver-xorg-video-nouveau   1:1.0.15-2   

$ lspci | grep VGA
03:00.0 VGA compatible controller: NVIDIA Corporation GM107GL [Quadro K620] 
(rev a2)
04:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 210] (rev 
a2)

$ uname -a
Linux xxx 4.13.0-1-amd64 #1 SMP Debian 4.13.4-2 (2017-10-15) x86_64 GNU/Linux

Selected lines from Xorg.0.log:

[  3877.659] (--) NOUVEAU(0): Chipset: "NVIDIA NV117"
[  3877.659] (II) NOUVEAU(0): Creating default Display subsection in Screen 
section
[...]
[  3877.693] (II) NOUVEAU(0): Output DVI-I-1 using monitor section rotated
[...]
[  3877.768] (II) NOUVEAU(0): Monitor name: DELL U2412M
[...]
[  3877.783] (II) NOUVEAU(0): Monitor name: DELL U3818DW
[...]
[  3877.783] (II) NOUVEAU(0): Output DVI-I-1 connected
[  3877.783] (II) NOUVEAU(0): Output DP-1 connected
[...]
[  3877.783] (--) NOUVEAU(G0): Chipset: "NVIDIA NVA8"
[...]
[  3877.795] (II) NOUVEAU(G0): Output DVI-I-1-2 using monitor section rotated
[  3877.851] (II) NOUVEAU(G0): Output HDMI-1-1 has no monitor section
[  3877.862] (II) NOUVEAU(G0): Output VGA-1-1 has no monitor section
[...]
[  3878.010] (II) NOUVEAU(G0): Monitor name: SHARP HDMI

but then nothing is connected to this monitor or this monitor is not
connected to anything...  The strange thing is that the output says that
output DVI-I-1-2 will use the "rotated" monitor section which has
already been assigned to the DVI-I-1 output.

I can post Xorg.0.log as well as my current xorg.conf if anybody is
interested.  Without an xorg-conf at all, I get the same effective
behaviour: two monitors working but third one ignored.

Any suggestions welcome.

Thank you,
-- 
: Eric S Fraga
: in Emacs 27.0.50 + Gnus v5.13 + evil-git-5d040cd
: BBDB version 3.1.2 (2017-01-30 14:47:26+00:00)


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Re: two graphics cards and two monitors

[Ric Moore]

On 01/10/2017 11:19 AM, Teemu Likonen wrote:

Dan Ritter [2017-01-10 10:56:21-05] wrote:


If you are using open drivers, `xrandr` should be able to list the
available outputs and modes and change between them.

If you are using proprietary NVidia drivers, "nvidia-settings" should
be able to work for you.


xrandr should work nicely with proprietary Nvidia drivers too. I've two
different Nvidia Geforce cards (one several years old and one new).
xrandr sees all monitor outputs, so configuring card for two monitors is
just a single xrandr command. I never had the two Nvidia cards connected
simultaneously, though. Just a single card with two monitors.


I am running two identical older nvidia GT-520 cards at once, to drive 
four monitors, using the nvidia driver and nvidia-settings to set the 
placement of the displays and create the xorg.conf file. You might have 
to disable the onboard video chipset though. No need to waste cycles 
dealing with something you won't use. It's swt. :) Ric



--
My father, Victor Moore (Vic) used to say:
"There are two Great Sins in the world...
..the Sin of Ignorance, and the Sin of Stupidity.
Only the former may be overcome." R.I.P. Dad.
http://linuxcounter.net/user/44256.html

Re: two graphics cards and two monitors

[Teemu Likonen]

Dan Ritter [2017-01-10 10:56:21-05] wrote:

> If you are using open drivers, `xrandr` should be able to list the
> available outputs and modes and change between them.
>
> If you are using proprietary NVidia drivers, "nvidia-settings" should
> be able to work for you.

xrandr should work nicely with proprietary Nvidia drivers too. I've two
different Nvidia Geforce cards (one several years old and one new).
xrandr sees all monitor outputs, so configuring card for two monitors is
just a single xrandr command. I never had the two Nvidia cards connected
simultaneously, though. Just a single card with two monitors.

-- 
/// Teemu Likonen   - .-..    //
// PGP: 4E10 55DC 84E9 DFF6 13D7 8557 719D 69D3 2453 9450 ///


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Re: two graphics cards and two monitors

[Dan Ritter]

On Wed, Jan 11, 2017 at 12:43:02AM +0900, Mark Fletcher wrote:
> 
> So a generic graphics card circa 2009, with a nVidia GeForce 9800 GTX+ 
> chipset, with an old D-type connector, a DVI connector, and an HDMI 
> connector -- would you expect it to be able to drive more than one 
> display? Given the manual is long since lost and was in a foreign 
> language anyway, any way to interrogate the card to see its 
> capabilities?
> 
> I used to use the DVI connector to connect to the monitor, then later 
> switched to the HDMI, and didn't have to do anything except plug in the 
> right cable at both ends to do that. So clearly, out of the box the same 
> image is being fed to all ports. Any way to find out if it is capable of 
> being cleverer than that?

I would expect it to be able to drive two monitors with
different pictures, and possibly three.

If you are using open drivers, `xrandr` should be able to list
the available outputs and modes and change between them.

If you are using proprietary NVidia drivers, "nvidia-settings"
should be able to work for you.

-dsr-

Re: two graphics cards and two monitors

[Mark Fletcher]

On Wed, Jan 04, 2017 at 10:43:10PM -0500, Felix Miata wrote:
> Mark Fletcher composed on 2017-01-04 23:30 (UTC+0900):
> 
> >I've seen several people say or imply this in the past. But I have an
> >ignorant question I am almost too embarrassed to ask (almost). Most
> >normal cards have only one connector of each type.
> AFAIK, those with only one standard connector, unless that connector is a
> DisplayPort, can only ever be used for displaying the same thing on each
> screen, typically called mirroring.
> 
> >So how are you
> >plugging in 2 monitors -- one into the HDMI and one into the DisplayPort
> >/ DVI / whatever connector???
> Many graphics adapters have multiple output ports that can be used
> simultaneously, and these can typically be configured to produce entirely
> unrelated things, or different portions of a single desktop too large to fit
> on one screen.
> 

So a generic graphics card circa 2009, with a nVidia GeForce 9800 GTX+ 
chipset, with an old D-type connector, a DVI connector, and an HDMI 
connector -- would you expect it to be able to drive more than one 
display? Given the manual is long since lost and was in a foreign 
language anyway, any way to interrogate the card to see its 
capabilities?

I used to use the DVI connector to connect to the monitor, then later 
switched to the HDMI, and didn't have to do anything except plug in the 
right cable at both ends to do that. So clearly, out of the box the same 
image is being fed to all ports. Any way to find out if it is capable of 
being cleverer than that?

Mark

Re: two graphics cards and two monitors

[Felix Miata]

Mark Fletcher composed on 2017-01-04 23:30 (UTC+0900):


I've seen several people say or imply this in the past. But I have an
ignorant question I am almost too embarrassed to ask (almost). Most
normal cards have only one connector of each type.
AFAIK, those with only one standard connector, unless that connector is a 
DisplayPort, can only ever be used for displaying the same thing on each screen, 
typically called mirroring.



So how are you
plugging in 2 monitors -- one into the HDMI and one into the DisplayPort
/ DVI / whatever connector???
Many graphics adapters have multiple output ports that can be used 
simultaneously, and these can typically be configured to produce entirely 
unrelated things, or different portions of a single desktop too large to fit on 
one screen.



Or do you use a special cable that plugs
into one connector at the card end and splits into 2 at the monitor end?


Some gfxcards are intended to be used with a special cable that splits the 
signal into two discrete ports. Those that I have work the same way as cards 
with multiple output ports.

--
"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/

Re: two graphics cards and two monitors

[kamaraju kusumanchi]

On Wed, Jan 4, 2017 at 9:30 AM, Mark Fletcher <mark2...@gmail.com> wrote:
> On Tue, Jan 03, 2017 at 09:37:00AM -0500, Ric Moore wrote:
>> On 01/01/2017 04:03 PM, jurek wrote:
>> >How to use two graphics cards and two monitors on nouveau driver.I have
>> >Nvidia gtx 650 ti boost and Nvidia gt 240 card.
>> >
>>
>> I agree with the comment that you can use just one video card for two
>> monitors. I run two IDENTICAL nvidia cards with 4 monitors, using the nvidia
>> driver and it works a charm. But I am not tasking a video driver with the
>> disparities of two different cards. Try using just the 650 card. Ric
>>
>>
>
> I've seen several people say or imply this in the past. But I have an
> ignorant question I am almost too embarrassed to ask (almost). Most
> normal cards have only one connector of each type. So how are you
> plugging in 2 monitors -- one into the HDMI and one into the DisplayPort
> / DVI / whatever connector??? Or do you use a special cable that plugs
> into one connector at the card end and splits into 2 at the monitor end?
> Would that even work? (I would have expected not)

Nothing to be embarrassed about. If you do not ask you would never know!

You can connect to two monitors using a splitter. Search for DVI
splitter cable on amazon.

hope that helps
-- 
Kamaraju S Kusumanchi | http://raju.shoutwiki.com/wiki/Blog

Re: two graphics cards and two monitors

[Dan Ritter]

On Wed, Jan 04, 2017 at 11:30:11PM +0900, Mark Fletcher wrote:
> On Tue, Jan 03, 2017 at 09:37:00AM -0500, Ric Moore wrote:
> > On 01/01/2017 04:03 PM, jurek wrote:
> > >How to use two graphics cards and two monitors on nouveau driver.I have
> > >Nvidia gtx 650 ti boost and Nvidia gt 240 card.
> > >
> > 
> > I agree with the comment that you can use just one video card for two
> > monitors. I run two IDENTICAL nvidia cards with 4 monitors, using the nvidia
> > driver and it works a charm. But I am not tasking a video driver with the
> > disparities of two different cards. Try using just the 650 card. Ric
> > 
> > 
> 
> I've seen several people say or imply this in the past. But I have an 
> ignorant question I am almost too embarrassed to ask (almost). Most 
> normal cards have only one connector of each type. So how are you 
> plugging in 2 monitors -- one into the HDMI and one into the DisplayPort 
> / DVI / whatever connector??? Or do you use a special cable that plugs 
> into one connector at the card end and splits into 2 at the monitor end? 
> Would that even work? (I would have expected not)

You can order all sorts of cards. 2 DVI, 6 DisplayPorts,
whatever.

DisplayPort, incidentally, can be split to carry several
monitor's signals, if they fit within the allowed bandwidth.
You'll need a smart adapter for that, though -- $20-80.

And many monitors have multiple inputs of different types.

-dsr-

Re: two graphics cards and two monitors

[Mark Fletcher]

On Tue, Jan 03, 2017 at 09:37:00AM -0500, Ric Moore wrote:
> On 01/01/2017 04:03 PM, jurek wrote:
> >How to use two graphics cards and two monitors on nouveau driver.I have
> >Nvidia gtx 650 ti boost and Nvidia gt 240 card.
> >
> 
> I agree with the comment that you can use just one video card for two
> monitors. I run two IDENTICAL nvidia cards with 4 monitors, using the nvidia
> driver and it works a charm. But I am not tasking a video driver with the
> disparities of two different cards. Try using just the 650 card. Ric
> 
> 

I've seen several people say or imply this in the past. But I have an 
ignorant question I am almost too embarrassed to ask (almost). Most 
normal cards have only one connector of each type. So how are you 
plugging in 2 monitors -- one into the HDMI and one into the DisplayPort 
/ DVI / whatever connector??? Or do you use a special cable that plugs 
into one connector at the card end and splits into 2 at the monitor end? 
Would that even work? (I would have expected not)

Mark

Re: two graphics cards and two monitors

[Ric Moore]

On 01/01/2017 04:03 PM, jurek wrote:

How to use two graphics cards and two monitors on nouveau driver.I have
Nvidia gtx 650 ti boost and Nvidia gt 240 card.



I agree with the comment that you can use just one video card for two 
monitors. I run two IDENTICAL nvidia cards with 4 monitors, using the 
nvidia driver and it works a charm. But I am not tasking a video driver 
with the disparities of two different cards. Try using just the 650 
card. Ric



--
My father, Victor Moore (Vic) used to say:
"There are two Great Sins in the world...
..the Sin of Ignorance, and the Sin of Stupidity.
Only the former may be overcome." R.I.P. Dad.
http://linuxcounter.net/user/44256.html

Re: two graphics cards and two monitors

[Teemu Likonen]

jurek [2017-01-01 22:03:57+01] wrote:

> How to use two graphics cards and two monitors on nouveau driver.I have
> Nvidia gtx 650 ti boost and Nvidia gt 240 card.

See "xrandr" command's output. It may already show your display outputs.
If so, then maybe something like:

xrandr --output HDMI-0 --auto
xrandr --output HDMI-1 --auto --right-of HDMI-0

Desktop environments may have graphical tool for configuring monitors.

-- 
/// Teemu Likonen   - .-..   <https://github.com/tlikonen> //
// PGP: 4E10 55DC 84E9 DFF6 13D7 8557 719D 69D3 2453 9450 ///


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Description: PGP signature

Re: two graphics cards and two monitors

[Gary Dale]

On 01/01/17 04:03 PM, jurek wrote:
How to use two graphics cards and two monitors on nouveau driver.I 
have Nvidia gtx 650 ti boost and Nvidia gt 240 card.


nouveau version :
xserver-xorg-video-nouveau 1:1.0.11-1 amd64 X.Org X server -- Nouveau 
display driver


lspci -v | grep NVIDIA

01:00.0 VGA compatible controller: NVIDIA Corporation GK106 [GeForce 
GTX 650 Ti Boost] (rev a1) (prog-if 00 [VGA controller])
06:00.0 VGA compatible controller: NVIDIA Corporation GT215 [GeForce 
GT 240] (rev a2) (prog-if 00 [VGA controller])


uname -a

Linux AdminPC 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u2 
(2016-10-19) x86_64 GNU/Linux


Thanks!

I'm not all that familiar with the Nouveau driver but that shouldn't be 
the sticking point. On most systems you just go into the display / 
monitors control (On KDE its in the System Settings menu) and set them 
up the way you want.

Re: two graphics cards and two monitors

[Sven Joachim]

On 2017-01-01 22:03 +0100, jurek wrote:

> How to use two graphics cards and two monitors on nouveau driver.I
> have Nvidia gtx 650 ti boost and Nvidia gt 240 card.

I'm not quite sure why you use such a setup, a single card would be fine
for two monitors.  Anyway, please consult the Nouveau Wiki[1].

Good luck,
Sven


1. https://nouveau.freedesktop.org/wiki/MultiMonitorDesktop/

two graphics cards and two monitors

[jurek]

How to use two graphics cards and two monitors on nouveau driver.I have 
Nvidia gtx 650 ti boost and Nvidia gt 240 card.


nouveau version :
xserver-xorg-video-nouveau 1:1.0.11-1 amd64 X.Org X server -- Nouveau 
display driver


lspci -v | grep NVIDIA

01:00.0 VGA compatible controller: NVIDIA Corporation GK106 [GeForce GTX 
650 Ti Boost] (rev a1) (prog-if 00 [VGA controller])
06:00.0 VGA compatible controller: NVIDIA Corporation GT215 [GeForce GT 
240] (rev a2) (prog-if 00 [VGA controller])


uname -a

Linux AdminPC 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19) 
x86_64 GNU/Linux


Thanks!