[ale] Dual video on HP pavillion running Centos

Neal Rhodes neal at mnopltd.com
Sun Jul 21 22:58:18 EDT 2013


Thanks for reply.   Note, there is no NEW chip.  There is just the chip
on which I am now writing your response at 1920xwhatever. 

That chip also feeds a DVI port under a plastic "do not remove" cover. 

Part of what I was asking - on Win7 and Ubuntu systems, you just plug in
a monitor, or turn it on, and they instantly react to it being there -
no need to restart. 

lspci says: 

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09) (prog-if 00
[VGA
controller])                                                                                                     
        Subsystem: Hewlett-Packard Company Device
2ac2                                                                            
        Flags: bus master, fast devsel, latency 0, IRQ
29                                                                         
        Memory at fe000000 (64-bit, non-prefetchable)
[size=4M]                                                                   
        Memory at c0000000 (64-bit, prefetchable)
[size=256M]                                                                     
        I/O ports at f000
[size=64]                                                                                               
        Expansion ROM at <unassigned>
[disabled]                                                                                  
        Capabilities: [90] MSI: Enable+ Count=1/1 Maskable-
64bit-                                                                
        Capabilities: [d0] Power Management version
2                                                                             
        Capabilities: [a4] PCI Advanced
Features                                                                                  
        Kernel driver in use:
i915                                                                                                
        Kernel modules: i915                               

That still doesn't quite seem to pin down the actual chip being used. 

Regards, 


Neal 


On Sun, 2013-07-21 at 21:32 -0400, Jim Kinney wrote:
> What an odd combination of hardware exclusions!
> 
> 
> 
> If you can "see" the on board chip with lspci then the proper driver
> should be able to address it. Do swome digging with data from lspci
> and see if the Intel chip can support dual output.
> 
> 
> 
> You might have to restart X to get it to "see" the new chip once and
> detect dual monitor capability.
> 
> 
> 
> 
> On Sun, Jul 21, 2013 at 5:49 PM, Neal Rhodes <neal at mnopltd.com> wrote:
> 
>         So, we've been running Centos 6.3 on an HP Pavilion p7-1131
>         Desktop PC
>         for about 1.5 years now.   And loving it.
>         
>         We now lust after running two 24" monitors for work.  No
>         games, just two
>         decent monitors at 1920x1080.
>         
>         The unit was delivered with an additional card: an HP
>         634478-001, which
>         is an HP flavor of AMD Radeon, which has DVI and HDMI only.
>         (no VGA;
>         weird.)  If this card is present, then I've experienced that
>          it takes
>         precedence, the onboard VGA goes dormant, and there ain't no
>         BIOS setup
>         options which pertain to making both of them play nice with
>         each other.
>         
>         And the really interesting thing is that the system board has
>         a DVI
>         connector, which is mounted onto a header and goes through a
>         port in the
>         back.   And on the DVI port on the back is a black plastic
>         cover screwed
>         on which says "DO NOT REMOVE".    (reminds me of a 78
>         Alfa-Romeo sedan
>         which had a sticker on the rear seats: "rear seats not to be
>         occupied
>         when vehicle is in motion".)
>         
>         
>         
>         Based on HP's website, the specs on the unit say:
>         
>         Intel Graphics Media Accelerator HD Integrated graphics
>         (DX10.1)
>         *Integrated video is not available if a graphics card is
>         installed.
>                 Supports PCI Express x16 graphics cards
>                 DVI and VGA ports (both ports can be used at the same
>         time)
>         
>         
>         Curious-er and Curious-er.   This thing was shipped with Win7.
>         
>         Various HP articles indicate they stick those plastic covers
>         on when the
>         additional video card would have caused the onboard video
>         ports to be
>         disabled.   I don't see any way this thing would have driven
>         the VGA as
>         delivered.
>         
>         My inclinations are to try using the onboard DVI port, since I
>         took the
>         Radeon card out.  I'm trying to figure out how to figure out
>         if the
>         Intel video chip would fail to drive the two ports at full
>         resolution if
>         it could do one.
>         
>         Any reason to not try?  Is my dipstick gonna fall off?
>         
>         I'd have to get a DVI-to-VGA cable to hook up the 2nd
>         monitor.  Can I
>         just hook it up and run the Display Preferences utility and
>         tell it to
>         Detect Monitors?  Or do I have to reboot?  Reason being that
>         I'm
>         switching these two monitors back and forth with client
>         notebooks.
>         
>         Neal Rhodes
>         MNOP Ltd
>         
>         
>         
>         
>         _______________________________________________
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> 
> 
> 
> 
> -- 
> -- 
> James P. Kinney III
> 
> Every time you stop a school, you will have to build a jail. What you
> gain at one end you lose at the other. It's like feeding a dog on his
> own tail. It won't fatten the dog.
> - Speech 11/23/1900 Mark Twain
> 
> http://electjimkinney.org
> http://heretothereideas.blogspot.com/
> 

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