The restricted module is definitely broken. Normally I can get two
separate screens next to each other with full DRI performance. If I
enable Xinerama then it uses the mesa drivers with slower performance.
Section "ServerFlags"
Option "Xinerama" "true"
EndSection
Here is the boot log with Xinerama enabled:
fglrx: module license 'Proprietary. (C) 2002 - ATI Technologies, Starnberg,
GERMANY' taints kernel.
Nov 21 16:50:54 burkey kernel: [ 37.404000] [fglrx] Maximum main memory to
use for locked dma buffers: 928 MBytes.
Nov 21 16:50:54 burkey kernel: [ 37.404000] [fglrx] module loaded - fglrx
8.37.6 [May 25 2007] on minor 0
Nov 21 16:50:54 burkey kernel: [ 37.436000] ACPI: PCI Interrupt
0000:01:00.0[A] -> GSI 16 (level, low) -> IRQ 16
Nov 21 16:50:58 burkey kernel: [ 40.580000] mtrr: no more MTRRs available
Nov 21 16:50:58 burkey last message repeated 3 times
Nov 21 17:04:45 burkey kernel: [ 867.972000] [fglrx] PCIe has already been
initialized. Reinitializing ...
Nov 21 17:04:45 burkey kernel: [ 868.124000] mtrr: no more MTRRs available
Nov 21 17:04:45 burkey last message repeated 3 times
Nov 21 17:09:02 burkey kernel: [ 1125.000000] [fglrx] PCIe has already been
initialized. Reinitializing ...
Nov 21 17:09:02 burkey kernel: [ 1125.032000] [fglrx] total GART =
130023424
Nov 21 17:09:02 burkey kernel: [ 1125.032000] [fglrx] free GART =
114032640
Nov 21 17:09:02 burkey kernel: [ 1125.032000] [fglrx] max single GART =
114032640
Nov 21 17:09:02 burkey kernel: [ 1125.032000] [fglrx] total LFB =
134086656
Nov 21 17:09:02 burkey kernel: [ 1125.032000] [fglrx] free LFB =
104214528
Nov 21 17:09:02 burkey kernel: [ 1125.032000] [fglrx] max single LFB =
104214528
Nov 21 17:09:02 burkey kernel: [ 1125.032000] [fglrx] total Inv = 0
Nov 21 17:09:02 burkey kernel: [ 1125.032000] [fglrx] free Inv = 0
Nov 21 17:09:02 burkey kernel: [ 1125.032000] [fglrx] max single Inv = 0
Nov 21 17:09:02 burkey kernel: [ 1125.032000] [fglrx] total TIM = 0
Nov 21 17:09:02 burkey kernel: [ 1125.140000] [fglrx] total GART =
130023424
Nov 21 17:09:02 burkey kernel: [ 1125.140000] [fglrx] free GART =
114032640
Nov 21 17:09:02 burkey kernel: [ 1125.140000] [fglrx] max single GART =
114032640
Nov 21 17:09:02 burkey kernel: [ 1125.140000] [fglrx] total LFB =
134086656
Nov 21 17:09:02 burkey kernel: [ 1125.140000] [fglrx] free LFB = 74334208
Nov 21 17:09:02 burkey kernel: [ 1125.140000] [fglrx] max single LFB = 74334208
Nov 21 17:09:02 burkey kernel: [ 1125.140000] [fglrx] total Inv = 0
Nov 21 17:09:02 burkey kernel: [ 1125.140000] [fglrx] free Inv = 0
Nov 21 17:09:02 burkey kernel: [ 1125.140000] [fglrx] max single Inv = 0
Nov 21 17:09:02 burkey kernel: [ 1125.140000] [fglrx] total TIM = 0
Maybe the video card does not have enough memory for such a large
screen?
--
fglrx: Xinerama does not work
https://bugs.launchpad.net/bugs/40544
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