CentOS, radeon driver, dual monitor, fun (NOT)]

[Alex Deucher]

On Fri, Apr 26, 2013 at 10:26 AM,  <m.roth at 5-cent.us> wrote:
> Well, I posted this a week ago. Does *anyone* have any suggestions as to
> what I need to do with my xorg.conf to get my user back to normal?
>
> (And please don't tell me to buy a new card: if you think we can just pop
> for one, call your US Congresscritters and tell them to repeal the
> Sequester.)


Did you try Dave's suggestion?  Does it work correctly using randr
before you try the legacy screen based multi-head setup?

Alex

>
>       mark
>
> ---------------------------- Original Message ----------------------------
> Subject: CentOS, radeon driver, dual monitor, fun (NOT)
> From:    m.roth at 5-cent.us
> Date:    Fri, April 19, 2013 14:56
> To:      xorg at lists.x.org
> --------------------------------------------------------------------------
>
> I've just joined the list in desperation, after days of fighting this.
>
> The ati & radeon drivers in CentOS (== RHEL) 6.4 are what I need to use,
> since neither kmod-fglrx nor the proprietary drivers from AMD/ATI have now
> dropped all support for "older" cards. My user has an Advanced Micro
> Devices [AMD] nee ATI RV620 [FirePro 2260] card, which is among those no
> longer supported (and it was in a machine we got in Nov!).
>
> Here's the problem: he's got two monitors. Like the rest of us, and as he
> was doing, he wants them side-by-side, like one large screen. I've tried
> Xorg --configure, which failed, and I've handcrafted some. The two best
> I've gotten give us a choice:
>    a) I can enable xinerama, which I gather is xor with randr. In that
> case, we
>          get what we want... EXCEPT that you can drag things offmonitor.
> and if
>          go a tad too far, what you wind up where you can move it up and
> down,
>          off monitor, but the whole thing moves right, and won't come
> back. The
>          result is an "L" of black; in ascii art,
>                   ________   _________
>                   |B|     |  |B|      |
>                   |B|     |  |B|      |
>                   |B|     |  |B|      |
>                   |B|     |  |B|      |
>                   |BBBBBBB|  |BBBBBBBB|
>                   ---------   ---------
>    b) I can disable xinerama, in which case we can drag the mouse from
>        monitor to monitor, but once logged in, you cannot drag a *window*
>        from one to the other, and they seem to almost be like two sessions,
>        with slightly different menus (he's using gnome; I installed the
>        gconf-editor, and disabled the xrandr plugin for gnome, so what I
>        get is all my xorg.conf file.
>
> The latter xorg.conf is as follows:
> Section "ServerFlags"
>     Option        "AllowMouseOpenFail" "true"
> EndSection
> <snip> of files, and input device>
> Section "Module"
>         Load  "glx"
> EndSection
>
> Section       "Device"
>   Identifier  "mycard0"
>   Driver      "radeon"
>   BusID       "PCI:2:0:0"
>   Screen      0
> EndSection
>
> Section       "Device"
>   Identifier  "mycard1"
>   Driver      "radeon"
>   BusID       "PCI:2:0:0"
>   Screen      1
> EndSection
>
> Section       "Monitor"
>   Identifier  "mymon0"
>   Option      "Monitor-DisplayPort-0"
>   Option      "Rotate" "left"
> #   Option      "Position" "0 0"
> EndSection
> Section       "Monitor"
>   Identifier  "mymon1"
>   Option      "Monitor-DisplayPort-1"
>   Option      "Rotate" "left"
> EndSection
>
> Section       "Screen"
>   Identifier  "myhead0"
>   Device      "mycard0"
>   Monitor     "mymon0"
>   DefaultDepth  24
>   SubSection  "Display"
>     Depth     24
>     Modes     "1280x1024"
>   EndSubSection
> EndSection
>
> Section       "Screen"
>   Identifier  "myhead1"
>   Device      "mycard1"
>   Monitor     "mymon1"
>   DefaultDepth  24
>   SubSection "Display"
>     Depth     24
>     Modes     "1280x1024"
>   EndSubSection
> EndSection
>
> Section "ServerLayout"
>   Identifier  "layout0"
>   InputDevice "keyboard0" "CoreKeyboard"
>   InputDevice "mouse0" "CorePointer"
>   Screen      0 "myhead0" RightOf "myhead1"
>   Screen      1 "myhead1"
>   Option      "Xinerama" "0"
> EndSection
>
> Any clues for the poor gladly accepted.
>
>          mark
>
>
>
>
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