Help? Xinerama with two cards

[Felix Miata]

On 2013-07-02 13:21 (GMT-1000) David Iannucci composed:

> David Iannucci wrote:

>> I'm trying to set up a xinerama arrangement over two graphics cards
>> (Intel + Radeon), taking advantage of xrandr 1.4's features which
>> (I understand, perhaps mistakenly, to) support this configuration.
>> I'm running xorg server 1.13.4 on Gentoo. It might be useful for
>> you to know in addition that I'm running a barebones KDE 3.5.10
>> desktop on it.

>> If I do --listproviders, I get both cards listed:

>> # xrandr --listproviders
>> Providers: number : 2
>> Provider 0: id: 0x87 cap: 0xb, Source Output, Sink Output, Sink
>> Offload crtcs: 3 outputs: 3 associated providers: 0 name:Intel
>> Provider 1: id: 0x57 cap: 0xd, Source Output, Source Offload, Sink
>> Offload crtcs: 6 outputs: 2 associated providers: 0 name:radeon

>> However no use of --setprovideroutputsource or
>> --setprovideroffloadsink (with arguments "0 1" or "1 0") will do
>> what I want.  Am I completely misunderstanding this?

>> One monitor is connected to VGA output of integrated Intel GPU, and
>> the other to DVI output of Radeon (HD 7570) PCI card.  I think kernel
>> stuff is set up properly:

>> # lsmod | grep radeon
>> radeon                858404  1
>> cfbfillrect             3714  2 i915,radeon
>> cfbimgblt               2039  2 i915,radeon
>> ttm                    58739  1 radeon
>> cfbcopyarea             3350  2 i915,radeon
>> drm_kms_helper         26569  2 i915,radeon
>> fb                     33637  6
>> i915,fbcon,drm_kms_helper,radeon,softcursor,bitblit
>> backlight               4248  2 video,radeon

>> Please document this functionality more clearly! Any help with this
>> will be much appreciated. I can try to end-run the problem by asking
>> my boss to buy me an HDMI-capable monitor, to plug into the second
>> port of Intel card, but I've already got the Radeon, and I'd rather
>> try to figure this out before throwing money at it :-) Thx.

> So.... I've left this sit for a while and it doesn't look like there's
> anyone here able to help.

> Is there a better place to ask for help with xrandr? Have I left out
> some crucial information?

I find config files easier to work with than xrandr. You might want to try. 
My last dual head session with Intel and Radeon left these behind:

http://fm.no-ip.com/Tmp/Linux/Xorg/xorg.conf-dualheadminimal
http://fm.no-ip.com/Tmp/Linux/Xorg/xorg.conf-dual-intel-03
https://01.org/linuxgraphics/documentation/how-set-dual-head-intel-graphics-randr-1.2

Something else to consider:

KDE 4.11 has KScreen, which is supposed to provide easy management of multi 
screen configuration.
-- 
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Felix Miata  ***  http://fm.no-ip.com/