Help? Xinerama with two cards

[David Iannucci]

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?

Dave



On Wed, Jun 26, 2013, at 15:51, David Iannucci wrote:
> Hi all,
> 
> 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.
> 
> Dave
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