problem with display-> dual head without DRI.

[lihb]

Hi,
Forgive me for my poor English.
My machine is dell d600, 1400x1050 LCD,
radeon 9000(M9). I have been using RH9, FC1
and FC2 on it. Most of the time, I need a 2nd
screen with 1280x1024 or 1024x768(projector).

I had been trying on radeon driver or
fglrx driver to setup these things:
1. clone mode, same content, different resolution on two screen.
2. dual head, different content, different resolution on two screen.

And here is what I got:
1, clone mode with radeon driver-> A large part of at the left of the screen had been cut off on 2nd screen.
2. clone mode with fglrx driver-> a small part at the bottom of the screen had been cut off at 2nd screen.
3. dual head with fglrx driver-> 2nd screen show statics lines in a mess.
4. dual head with radeon driver->look ok, but no DRI.

The xorg.conf of 1. is the original files with
modification, the 2. and 3. is setup by fglrxconfig,
the xorg.conf of 4. is as below:
#########################################
Section "ServerLayout"
Identifier "Multihead layout"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" RightOf "Screen0"
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
Option "Xinerama" "off"
Option "Clone" "on"
EndSection
# other unrelated things
Section "Module"
Load "dbe"
Load "extmod"
Load "fbdevhw"
Load "glx"
Load "record"
Load "freetype"
Load "type1"
Load "dri"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Dell 1400x1050 Laptop Display Panel"
HorizSync 31.5 - 90.0
VertRefresh 59.0 - 75.0
Option "dpms"
EndSection

Section "Monitor"
Identifier "Monitor1"
VendorName "Monitor Vendor"
ModelName "Monitor 1024x768"
HorizSync 31.5 - 57.0
VertRefresh 50.0 - 70.0
Option "dpms"
EndSection

Section "Device"
Identifier "Videocard0"
Driver "radeon"
VendorName "Videocard vendor"
BoardName "ATI Radeon Mobility M9"
Option "AGPMode" "4"
Option "EnablePageFlip" "true"
Option "MonitorLayout" "LVDS, TMDS"
Option "backingstore"
BusID "PCI:1:0:0"
Screen 0
EndSection

Section "Device"
Identifier "Videocard1"
Driver "radeon"
VendorName "Videocard Vendor"
BoardName "ATI Radeon Mobility M9"
Option "AGPMode" "4"
Option "EnablePageFlip" "true"
Option "MonitorLayout" "LVDS, TMDS"
Option "backingstore"
BusID "PCI:1:0:0"
Screen 1
EndSection
Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 16
Modes "1400x1050" "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1400x1050" "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
EndSection

Section "Screen"
Identifier "Screen1"
Device "Videocard1"
Monitor "Monitor1"
DefaultDepth 16
SubSection "Display"
Viewport 0 0
Depth 16
Modes "1024x768"
EndSubSection
EndSection

Section "DRI"
Group 0
Mode 0666
EndSection
###########################################

Is that possible to produce a clone mode with different resolution?
Dual head of radeon driver couldn't support DRI, is that true?
How do I edit xorg.conf with fglrx driver to let the 2nd screen in dual head look normal as in radeon driver?

Thanks.

lihb@phys.sinica.edu.tw

attach files: the 4 complete xorg.conf files I mentions.

[olivierv]

Hey-

I've gotten dual monitors to work on both my Mobility 9000 and Mobility 9700, but never with the fglrx driver from ATI. That driver always (for me) brings up a corrupted image on my second monitor. I've had good luck with the 'radeon' driver provided with the XFree86 project however. I don't think you can get dual head (or xinerama) with DRI acceleration. First of all, DRI is not provided with the 'radeon' driver, but I could be wrong on that. As far as the fglrx driver is concerned, we're out of luck because the mobility cards are not supported.

To recap:
-Clone mode is excatly that, a clone of the primay driver so whatever resolution is on the primary driver is what you're going to get on the clone. To change the clone resolution, change the primary resolution
-I have never been able to modify my xorg.conf file to get a usable second monitor using the fglrx driver, I have gotten dual head and xinerama to work with the radeon driver (2 different resolutions)

Let me know if you need more info about the dual head setup using the 'radeon' driver or look at this post.

Good luck.

Olivier