Created attachment 69191
Xorg log when unsupported muxless platform is reported

Bug already reported to AMD, but since it seems to involve Intel driver, I thought it might be a good idea to report here as well.

Actually two similar bugs have been reported to AMD :
http://ati.cchtml.com/show_bug.cgi?id=634 (reported by me)
http://ati.cchtml.com/show_bug.cgi?id=580

I am the owner of an ACER Aspire TimelineX 3820 TG featuring a core i5-480M +
Radeon HD6550M.
Configuration (32 bits ONLY installation) :
- kernel 3.4.14
- glibc 2.14.1
- gcc 4.6.1
- Xorg 7.7 with xorg-server 1.12.1 / xf86-video-intel 2.20.10
- Slim 1.3.2
- fglrx 12.10 or 12.11 beta

X works fine with :
- the dGPU only ("discrete" selected in the bios)
- the IGP only ("switchable" selected in the bios and dGPU NOT declared in the
ServerLayout section).

X crashes at startup when :
- "switchable graphics" is selected in the bios
- only the dGPU is declared in the ServerLayout :
excerpt of Xorg.0.log
... snip ...
[    20.778] (==) ServerLayout "laptop"
[    20.778] (**) |-->Screen "high performance" (1)
[    20.778] (**) |   |-->Monitor "Acer 3820TG"
[    20.778] (**) |   |-->Device "Radeon HD 6550M"
... snip ...
[    20.780] (--) PCI:*(0:0:2:0) 8086:0046:1025:051b rev 24, Mem @
0xf0000000/4194304, 0xd0000000/268435456, I/O @ 0x00001800/8
[    20.780] (--) PCI: (0:2:0:0) 1002:68c1:1025:051b rev 0, Mem @
0xb0000000/268435456, 0xafee0000/131072, I/O @ 0x00002000/256, BIOS @
0x????????/131072
... snip ...
[    20.865] (--) Chipset Supported AMD Graphics Processor (0x68C1) found
[    20.866] (WW) fglrx: No matching Device section for instance (BusID
PCI:0@2:0:1) found
[    20.866] (II) fglrx: intel VGA device detected, load intel driver.
[    20.866] (II) LoadModule: "intel"
[    20.866] (II) Loading /opt/X11/lib/xorg/modules/drivers/intel_drv.so
[    20.866] (II) Module intel: vendor="X.Org Foundation"
[    20.866]    compiled for 1.12.2, module version = 2.20.10
[    20.866]    Module class: X.Org Video Driver
[    20.866]    ABI class: X.Org Video Driver, version 12.0
[    20.866] (WW) PowerXpress feature is not supported on A+I Mux platform.
Please uninstall fglrx driver.
[    20.866] (EE) this is a Muxless PX A+I platform, we doesn't supported it
[    20.866] (EE) No devices detected.
[    20.866] 
Fatal server error:
[    20.866] no screens found

I am a bit puzzled by :
"this is a Muxless PX A+I platform, we doesn't supported it"

X crashes at startup when :
- "switchable graphics" is selected in the bios
- both dGPU (Radeon HD 6550M) and iGPU (Core i5 IGP) are declared in the
ServerLayout section :

excerpt of Xorg.0.log
... snip ...
[   205.098] (==) ServerLayout "laptop"
[   205.098] (**) |-->Screen "low power" (0)
[   205.098] (**) |   |-->Monitor "Acer 3820TG"
[   205.098] (**) |   |-->Device "Intel HD Graphics"
[   205.098] (**) |-->Screen "high performance" (1)
[   205.099] (**) |   |-->Monitor "Acer 3820TG"
[   205.099] (**) |   |-->Device "Radeon HD 6550M"
... snip ...
[   142.387] (--) PCI:*(0:0:2:0) 8086:0046:1025:051b rev 24, Mem @
0xf0000000/4194304, 0xd0000000/268435456, I/O @ 0x00001800/8
[   142.387] (--) PCI: (0:2:0:0) 1002:68c1:1025:051b rev 0, Mem @
0xb0000000/268435456, 0xafee0000/131072, I/O @ 0x00002000/256, BIOS @
0x????????/131072
... snip ...
[   142.490] (II) fglrx(1): === [xdl_xs112_atiddxPreInit] === begin
[   142.491] 
[   142.491] Backtrace:
[   142.491] 0: /opt/X11/bin/X (xorg_backtrace+0x49) [0x81c3f59]
[   142.491] 1: /opt/X11/bin/X (0x8048000+0x17f83a) [0x81c783a]
[   142.491] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb771540c]
[   142.491] 3: /opt/X11/lib/xorg/modules/drivers/fglrx_drv.so
(xdl_xs112_atiddxPxPreInit+0xa9) [0xb6893409]
[   142.491] 4: /opt/X11/lib/xorg/modules/drivers/fglrx_drv.so
(xdl_xs112_atiddxPreInit+0x2282) [0xb686cd52]
[   142.491] 5: /opt/X11/bin/X (InitOutput+0x85b) [0x80bcd8b]
[   142.491] 
[   142.491] Segmentation fault at address 0x62
[   142.491] 
Fatal server error:
[   142.491] Caught signal 11 (Segmentation fault). Server aborting

Thank you for your support,
Seb.