Help? Xinerama with two cards

[Alex Deucher]

On Fri, Jul 12, 2013 at 6:13 PM, Felix Miata <mrmazda at earthlink.net> wrote:
> On 2013-07-11 19:04 (GMT-1000) David Iannucci composed:
>
>>> KDE 4.11 has KScreen, which is supposed to provide easy management of
>>> multi screen configuration.
>
>
>> Trying to go more minimalist, not more bloatist :-) :-)
>
>
> You might have to anyway. According to the last section on
> https://wiki.archlinux.org/index.php/Multihead#Xinerama it appears what's
> getting in the way of success is KDE itself.
>
> In spite of having seen that over an hour ago, I've been spending more time
> trying myself. With the Radeon card removed from the slot, and cables
> connected to the only two ports, the  log reports.
>
> (II) intel(0): Output VGA1 connected
> (II) intel(0): Output HDMI1 connected
> (II) intel(0): Output DP1 disconnected
>
> The motherboard has nothing like a DP connector or solder points where one
> might have been. The HDMI1 port has only a DVI-D connector, which I connect
> to the TV with a 25' DVI to HDMI cable.
>
> When I put the Radeon back in the slot, the string HDMI is nowhere to be
> found in the log, though this may be about a BIOS setting. The BIOS has 5
> video configuration options "Initiate Graphic Adapter" described asr which
> to use as primary boot device, with nothing that explains how to select the
> one most appropriate:
>
> IGD
> PCI/IGD
> PCI/PEG
> PEG/IGD
> PEG/PCI (default after clear CMOS and load optimal defaults)
>
> Below that is "Boot Display Device", which without the Radeon in the slot
> offers:
> D-SUB + HDMI
> D-SUB + DVI
> Only DisplayPort
>
> Next is "IGD Graphics Mode Select" offering either disabled or enabled
> coupled with 3 different RAM sizes.
>
> Others to config include "Video Function Configuration" for DVMT memory, PEG
> port either enabled or auto, and PAVP mode either disabled, Lite or High.
>
> WRT BIOS settings with DVI connected to Radeon and VGA connected to Intel:
> IGD with D-SUB + HDMI:          puts vt output only on VGA
> IGD with D-SUB + DVI:           puts vt output only on VGA
> PCI/IGD with D-SUB + HDMI:      puts vt output only on VGA
> PCI/IGD with D-SUB + DVI:       puts vt output only on VGA
> PCI/PEG with D-SUB + HDMI:      puts vt output only on DVI
> PCI/PEG with D-SUB + DVI:       puts vt output only on DVI
> PEG/IGD with D-SUB + HDMI:      puts vt output only on DVI
> PEG/IGD with D-SUB + DVI:       puts vt output only on DVI
> PEG/PCI with D-SUB + HDMI:      puts vt output only on DVI
> PEG/PCI with D-SUB + DVI:       puts vt output only on DVI
> summary: PEG enabled = DVI; else VGA
>
> WRT BIOS settings with VGA connected to Radeon and DVI connected to Intel:
> IGD with D-SUB + HDMI:          no vt output; VGA asleep; DVI awake but all
> black
> IGD with D-SUB + DVI:           no vt output; VGA asleep; DVI awake but all
> black
> PCI/IGD with D-SUB + HDMI:      no vt output; VGA asleep; DVI awake but all
> black
> PCI/IGD with D-SUB + DVI:       no vt output; VGA asleep; DVI awake but all
> black
> PCI/PEG with D-SUB + HDMI:      puts vt output only on VGA; DVI awake but
> all black
> PCI/PEG with D-SUB + DVI:       puts vt output only on VGA; DVI awake but
> all black
> PEG/IGD with D-SUB + HDMI:      puts vt output only on VGA; DVI awake but
> all black
> PEG/IGD with D-SUB + DVI:       puts vt output only on VGA; DVI awake but
> all black
> PEG/PCI with D-SUB + HDMI:      puts vt output only on VGA; DVI awake but
> all black
> PEG/PCI with D-SUB + DVI:       puts vt output only on VGA; DVI awake but
> all black
> summary: radeon VGA connection disables Intel DVI output
>

I'm not too familiar with Intel hardware, but I suspect the pcie lanes
are shared with display channels so if you have a pcie card in the
slot, some of the displays are not available.

Alex