On Fri, Jul 12, 2013 at 1:04 AM, David Iannucci <kbe...@punchcutter.ml1.net> wrote: > Thanks for the responses Felix and Dave. I will rearrange the > quotations below a bit: > >> 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: > > Thanks... checked these out. I took your advice and did my best to > craft an xorg.conf based on your examples and other documentation I > found, but nothing is happening on my second monitor (this doesn't > surprise me much). > > I have read a few times now that Xorg is not supposed to need config > files any more - that it's mostly self-configuring, and xrandr is the > way to go to manipulate your display if you need to, and this appeals to > me a lot..... I never was very comfortable with xorg.conf :-) > > Please recall that what I'm trying to do is drive two heads off of > _two different_ GPUs. I was told a few years ago by someone who > seemed to know what he was talking about that X just doesn't DO that > (at the time). My understanding was that recent changes in xrandr 1.4 > would allow it. > >> KDE 4.11 has KScreen, which is supposed to provide easy management of >> multi screen configuration. > > Trying to go more minimalist, not more bloatist :-) :-) > > So here's the nutshell of what I'm left with: > > Xrandr shows me 3 outputs: VGA1, HDMI2, and DP1 (with only VGA1 > "connected", even though 2nd monitor is plugged into DVI port of > Radeon). This DP1 original fooled me into thinking that the 2nd port on > my Radeon card was a DisplayPort, but close examination shows it to be > HDMI. So "DP1" is confusing. Between the 2 GPUs there are 4 output ports > (two on each), so the fact that xrandr shows me 3 is a hint that my > kernel is.... ok? But why not four? > > Finally, perhaps I failed to mention before that sometimes partial > chunks of output (system boot messages), or a "distortion pattern" (?) > appear on monitor 2. This is encouraging to me, but I don't know if it's > really good news. > > Anyone who missed my original post can look below to see that > xrandr --listproviders gives a sensible output. > > Hoping that this, my last post on the topic before giving up and > probably buying an HDMI-VGA adaptor, will attract the attention of > someone who knows how to troubleshoot it. > > At the very least, I would really like to know the truth about > (1) whether X.org has never, historically, been able to drive a > dual-head setup off of two GPUs, and
X has been able to drive multiple GPUs for years via a static xorg.conf. >(2) whether xrandr 1.4 is really > supposed to remedy this. Thanks a lot. > It's a start, but it's still not there for all configurations. The provider stuff in xserver 1.14 was mainly focused on support for hybrid laptops and hot-pluggable USB display adapters. Alex > Dave > > > > On Tue, Jul 2, 2013, at 13:52, Felix Miata wrote: >> 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? >> > _______________________________________________ > xorg@lists.x.org: X.Org support > Archives: http://lists.freedesktop.org/archives/xorg > Info: http://lists.x.org/mailman/listinfo/xorg > Your subscription address: alexdeuc...@gmail.com _______________________________________________ xorg@lists.x.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.x.org/mailman/listinfo/xorg Your subscription address: arch...@mail-archive.com
