[ltp] t42 and dual-head/mergedfb

[Sebastian von Swiontek-Brzezinski]

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Alex Deucher wrote:
> On 12/29/05, Sebastian von Swiontek-Brzezinski <svs@talicom.de> wrote:
>> hi list,
>>
>> i'm owning a t42 (2373-5wg) with an ati radeon 7500 (Radeon Mobility M7
>> LW) with 32MB ram. I tried to connect an external monitor (a 19" tft and
>> a possible resolution of 1280x1024) to expand my screen, not cloning. My
>> ThinkPad LCD is able to show 1024x768. At first i tried to use mergedfb.
>> It works, but then my thinkpad lcd has a virtual 1280x1024 resolution
>> and i have to scroll. But i do not like this!!!
> 
> if you are using xorg cvs/6.9/7.0 you can enable the mergedfb
> non-rectangluar option to disable the scrolling in the smaller head.
Okay. Thats a fine thing. I have to look how i can use that 
xorg-versions with my opensuse. They are using 6.8. Hmm...

> 
>> So i tried to use two devices, two monitors and two screens with
>> xinerama. When I start x, my kde is on the right side open and my mouse
>> pointer disappers. But the problem is, that the graphic card does not
>> enable the external output and my tft gets no signal.
>>
>> Perhaps the following line of my xorg-log is the reason:
>> (WW) RADEON(0): Failed to detect secondary monitor, MergedFB/Clone mode
>> disabled
> 
> for some reason your second head is not being detected.  you need to
> force it on.
Do you mean the flag, which you described below?

> 
>> Does anybody knows, how to activate this?
> 
> add this option to your first device section:
> Option "monitorlayout" "LVDS, CRT"
I tried this flag, but it does not matter. It is quite interesting: on 
booting my external display shows the same like my thinkpad lcd. But 
when my x starts, my external tft loses its signal... When i switch back 
to a console, my external tft is reconnected and shows the console.

Cheers,
Sebastian.

> 
> Alex
> 
>> Thanks in advance,
>> Sebastian
>>
>> Here is my xorg.conf:
>> Section "ServerLayout"
>>    Identifier   "Layout[all]"
>>    InputDevice  "Keyboard[0]" "CoreKeyboard"
>>    InputDevice  "Mouse[1]" "CorePointer"
>>    # Option       "Clone" "on"
>>    Option       "Xinerama" "on"
>>    Screen       0 "Screen[0]" 0 0
>>    Screen       1 "Screen[1]" RightOf "Screen[0]"
>> EndSection
>>
>> Section "Screen"
>>    DefaultDepth 24
>>    SubSection "Display"
>>      Depth      24
>>      Modes      "1024x768"
>>    EndSubSection
>>    Device       "Device[0]"
>>    Identifier   "Screen[0]"
>>    Monitor      "Monitor[0]"
>> EndSection
>>
>> Section "Screen"
>>    DefaultDepth 24
>>    SubSection "Display"
>>      Depth      24
>>      Modes      "1280x1024"
>>    EndSubSection
>>    Device       "Device[1]"
>>    Identifier   "Screen[1]"
>>    Monitor      "Monitor[1]"
>> EndSection
>>
>> Section "Device"
>>    BoardName    "Radeon LW 1"
>>    BusID        "1:0:0"
>>    Driver       "radeon"
>>    Identifier   "Device[0]"
>>    Screen       0
>>    VendorName   "ATI"
>>    Option       "DynamicClocks"
>> EndSection
>>
>> Section "Device"
>>    BoardName    "Radeon LW 2"
>>    BusID        "1:0:0"
>>    Driver       "radeon"
>>    Identifier   "Device[1]"
>>    Screen       1
>>    VendorName   "ATI"
>>    Option       "DynamicClocks"
>> EndSection
>>
>> Section "Monitor"
>>    DisplaySize  300 230
>>    HorizSync    31-68
>>    Identifier   "Monitor[0]"
>>    ModelName    "1024X768@75HZ"
>>    VendorName   "--> LCD"
>>    VertRefresh  50-85
>>    UseModes     "Modes[0]"
>> EndSection
>>
>> Section "Monitor"
>>    DisplaySize  340 270
>>    HorizSync    31-82
>>    Identifier   "Monitor[1]"
>>    ModelName    "1280X1024@75HZ"
>>    VendorName   "--> LCD"
>>    VertRefresh  58-75
>> EndSection
>>
>>
>>

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