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

[m.roth at 5-cent.us]

Alex Deucher wrote:
> 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?
<snip>
> Did you try Dave's suggestion?  Does it work correctly using randr
> before you try the legacy screen based multi-head setup?
>
Which was that, to try to bring up X with no xorg.conf file? I did that
days before I posted; that was an obvious thing to try. No, that didn't
work, it left me, IIRC, with one screen. Xorg --configure reported it had
failed, showed four monitors (?), and left me with both lit, but one
completely unreachable.

Right now, so he can work, I've got it using xrandr, xinerama off, and he
can drag a mouse between windows, but cannot drag anything else between
them.

And if the problem with xinerama wasn't clear, here's some ascii art:

       _________  _________
       | |      | | |      |
       | |      | | |      |
       | |      | | |      |
       | |______| | |______|
       |________| |________|

That's what it looks like after moving the mouse around, with the "L"
black, and offscreen. Again, using a mouse, we can move it up and down, so
as to see the whole screen, but cannot move the mouse right to push the
screen back to the left.

This is what I meant about it looking as though the viewport, or whatever
the correct X term is, is larger than the screen, though I can't imagine
why. I've also tried putting in the absolute offset, and that makes no
difference.

       mark
> 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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>> Your subscription address: alexdeucher at gmail.com
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