[   339.983] (II) RADEON(0): EDID for output DVI-0
[   339.983] (II) RADEON(0): Output VGA-0 connected
[   339.983] (II) RADEON(0): Output HDMI-0 disconnected
[   339.983] (II) RADEON(0): Output DVI-0 disconnected
[   339.983] (II) RADEON(0): Using exact sizes for initial modes
[   339.983] (II) RADEON(0): Output VGA-0 using initial mode 1920x1080
[   339.983] (II) RADEON(0): Using default gamma of (1.0, 1.0, 1.0) unless otherwise stated.
[   339.983] (II) RADEON(0): mem size init: gart size :1fdef000 vram size: s:20000000 visible:1f7d7000
[   339.983] (II) RADEON(0): EXA: Driver will allow EXA pixmaps in VRAM
[   339.983] (==) RADEON(0): DPI set to (96, 96)
[   339.983] (II) Loading sub module "fb"
[   339.983] (II) LoadModule: "fb"
[   339.983] (II) Loading /usr/lib/xorg/modules/libfb.so
[   339.984] (II) Module fb: vendor="X.Org Foundation"
[   339.984]    compiled for 1.14.0, module version = 1.0.0
[   339.984]    ABI class: X.Org ANSI C Emulation, version 0.4
[   339.984] (II) Loading sub module "ramdac"
[   339.984] (II) LoadModule: "ramdac"
[   339.984] (II) Module "ramdac" already built-in
[   339.984] (II) UnloadModule: "vesa"
[   339.984] (II) Unloading vesa
[   339.984] (II) UnloadModule: "fbdev"
[   339.984] (II) Unloading fbdev
[   339.984] (II) UnloadSubModule: "fbdevhw"
[   339.984] (II) Unloading fbdevhw
[   339.984] (--) Depth 24 pixmap format is 32 bpp
[   339.984] (II) RADEON(0): [DRI2] Setup complete
[   339.984] (II) RADEON(0): [DRI2]   DRI driver: r600
[   339.984] (II) RADEON(0): [DRI2]   VDPAU driver: r600
[   339.985] (II) RADEON(0): Front buffer size: 8160K
[   339.985] (II) RADEON(0): VRAM usage limit set to 456966K
[   339.985] (==) RADEON(0): Backing store disabled
[   339.985] (II) RADEON(0): Direct rendering enabled
[   339.985] (II) EXA(0): Driver allocated offscreen pixmaps
[   339.985] (II) EXA(0): Driver registered support for the following operations:
[   339.985] (II)         Solid
[   339.985] (II)         Copy
[   339.985] (II)         Composite (RENDER acceleration)
[   339.985] (II)         UploadToScreen
[   339.985] (II)         DownloadFromScreen
[   339.985] (EE) 
[   339.985] (EE) Backtrace:
[   339.985] (EE) 0: /usr/bin/X (xorg_backtrace+0x36) [0x58a846]
[   339.985] (EE) 1: /usr/bin/X (0x400000+0x18e669) [0x58e669]
[   339.985] (EE) 2: /usr/lib/libpthread.so.0 (0x7fcc25cd2000+0xf1e0) [0x7fcc25ce11e0]
[   339.985] (EE) 3: /usr/lib/xorg/modules/drivers/radeon_drv.so (0x7fcc208b9000+0x30c30) [0x7fcc208e9c30]
[   339.985] (EE) 4: /usr/lib/xorg/modules/drivers/radeon_drv.so (0x7fcc208b9000+0x292e9) [0x7fcc208e22e9]
[   339.985] (EE) 5: /usr/lib/xorg/modules/drivers/radeon_drv.so (0x7fcc208b9000+0x29623) [0x7fcc208e2623]
[   339.985] (EE) 6: /usr/lib/xorg/modules/drivers/radeon_drv.so (0x7fcc208b9000+0xb640) [0x7fcc208c4640]
[   339.986] (EE) 7: /usr/lib/xorg/modules/drivers/radeon_drv.so (0x7fcc208b9000+0x45b8a) [0x7fcc208feb8a]
[   339.986] (EE) 8: /usr/bin/X (AddScreen+0x85) [0x438155]
[   339.986] (EE) 9: /usr/bin/X (InitOutput+0x3f3) [0x479ab3]
[   339.986] (EE) 10: /usr/bin/X (0x400000+0x266b6) [0x4266b6]
[   339.986] (EE) 11: /usr/lib/libc.so.6 (__libc_start_main+0xf5) [0x7fcc24b5ea15]
[   339.986] (EE) 12: /usr/bin/X (0x400000+0x26bdd) [0x426bdd]
[   339.986] (EE) 
[   339.986] (EE) Bus error at address 0x7fcc269a0000
[   339.986] 
Fatal server error:
[   339.986] Caught signal 7 (Bus error). Server aborting
[   339.986] 
[   339.986] (EE) 
Please consult the The X.Org Foundation support 
         at http://wiki.x.org
 for help. 
[   339.986] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[   339.986] (EE) 
[   339.993] Server terminated with error (1). Closing log file.