Bug#577558: further tests with modified xorg.conf

[亚历山大 <ac007@bluewin.ch>]

As suggested by Will, i tried to start X with <a> no xorg.conf,
<b> mininal xorg.conf which gives :

<a>
    (--) PCI:*(0:1:0:0) 1002:71c6:17af:216a ATI Technologies Inc RV530LE [Radeon X1600/X1650 PRO] rev 0, Mem @ 0xe0000000/268435456, 0xfe9e0000/65536, I/O @ 0x0000de00/256, BIOS @ 0x????????/131072
    (--) PCI: (0:1:0:1) 1002:71e6:17af:216b ATI Technologies Inc RV530LE [Radeon X1650 PRO] (Secondary) rev 0, Mem @ 0xfe9f0000/65536
    [...]
    (EE) Failed to load module "ati" (module does not exist, 0)
    (EE) Failed to load module "vesa" (module does not exist, 0)
    (EE) Failed to load module "fbdev" (module does not exist, 0)
    (EE) No drivers available.
    Fatal server error:
    no screens found
</a>

<b>
    # Minimal-xorg.conf
        Section "ServerLayout"
          Identifier    "X.org Configured"
        EndSection

        Section "Device"
          Identifier    "Card0"
          Driver        "radeon"
          VendorName    "ATI Techologies Inc"
          BoardName     "RV530LE [Radeon X1600/X1650 PRO]"
          BusID         "PCI:1:0"
        EndSection
    #

* Does not solve the reported problems
+ using EXA instead of UXA
+ does not detect screen size properly
-> applies wrong DPI consequently.
</b>

I forgot to mention that I'm starting X with startx and the
following

#~/.xinitrc
feh --bg-scale ~/documents/divers/wallpapers/herbe2b-Sid.jpg &
eval "$(gpg-agent --daemon)"
xset s off
xrdb -merge ~/.Xresources
/usr/bin/xmonad
wait $!