Arch Linux

underflow

Member

Registered: 2009-06-04

Posts: 3

ATI Radeon - xrandr dual screen problem

I've been trying to get a dual screen environment working, with Sony Vaio SR21 laptop screen + Samsung Syncmaster 710v Screen, without much luck.

I can set both screens with xrandr/arandr, but only one is working, the other one is powered up but it is blank all the time.

The output of xrandr -q is:

xrandr -q
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 2560 x 1024
VGA-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 338mm x 270mm
   1280x1024      60.0*+   75.0     60.0* 
   1152x864       75.0  
   1024x768       75.0     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     66.7     59.9  
   720x400        70.1  
LVDS connected 1280x800+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1280x800       59.8*+
   1280x720       59.9  
   1152x768       59.8  
   1024x768       60.0     59.9  
   800x600        60.3     59.9  
   640x480        59.9     59.4  
HDMI-0 disconnected (normal left inverted right x axis y axis)
DVI-0 disconnected (normal left inverted right x axis y axis)

Current xorg.conf:

Section "Files"
    ModulePath   "/usr/lib/xorg/modules"
    FontPath     "/usr/share/fonts/misc:unscaled"
    FontPath     "/usr/share/fonts/misc"
    FontPath     "/usr/share/fonts/75dpi:unscaled"
    FontPath     "/usr/share/fonts/75dpi"
    FontPath     "/usr/share/fonts/100dpi:unscaled"
    FontPath     "/usr/share/fonts/100dpi"
    FontPath     "/usr/share/fonts/PEX"
# Additional fonts: Locale, Gimp, TTF...
    FontPath     "/usr/share/fonts/cyrillic"
#    FontPath     "/usr/share/lib/X11/fonts/latin2/75dpi"
#    FontPath     "/usr/share/lib/X11/fonts/latin2/100dpi"
# True type and type1 fonts are also handled via xftlib, see /etc/X11/XftConfig!
    FontPath     "/usr/share/fonts/Type1"
    FontPath     "/usr/share/fonts/ttf/western"
    FontPath     "/usr/share/fonts/ttf/decoratives"
    FontPath     "/usr/share/fonts/truetype"
    FontPath     "/usr/share/fonts/truetype/openoffice"
    FontPath     "/usr/share/fonts/truetype/ttf-bitstream-vera"
    FontPath     "/usr/share/fonts/latex-ttf-fonts"
    FontPath     "/usr/share/fonts/defoma/CID"
    FontPath     "/usr/share/fonts/defoma/TrueType"
EndSection

Section "Module"
    Load  "ddc"  # ddc probing of monitor
    Load  "dbe"
    Load  "dri"
    Load  "drm"
    Load  "extmod"
    Load  "glx"
    Load  "bitmap" # bitmap-fonts
    Load  "type1"
    Load  "freetype"
    Load  "record"
    #Load  "synaptics"
EndSection

# Auto-generated by Archie mkxcfg

Section "Monitor"
    Identifier     "LVDS"
    Option        "PreferredMode" "1280x800"
    Option         "DPMS" "true"
EndSection

Section "Monitor"
    Identifier     "VGA-0"
    Option        "PreferredMode" "1280x1024"
EndSection

# Auto-generated by Archie mkxcfg


Section "Device"
    Identifier  "Card0"
    Driver      "radeon"
    #VendorName  "All"
    #BoardName   "All"
    Option        "DRI" "true"
    Option        "AccelMethod"   "EXA"
EndSection


Section "Screen"
    Identifier "Screen0"
    Device     "Card0"
    Monitor    "LVDS"
    DefaultDepth    24
    SubSection "Display"
        Depth        24
        Viewport    0 0
        Virtual     2560 1024
    EndSubSection
EndSection

Section "DRI"
    Mode 0666
EndSection

Section "ServerLayout"
    Identifier     "Xorg Configured"
    Screen          0  "Screen0" 0 0
EndSection

I've tried before with only one screen defined, without any luck neither.

I'm using: RandR version 1.3, Openbox 3.4.7.2.

Also I've tried with multiple xrandr options, including "--auto" and:

 xrandr --output LVDS --mode 1280x800 --output VGA-0 --mode 1280x1024 --left-of LVDS

Could you please give some guidance to make it work?

Thank you in advance.

Last edited by underflow (2009-06-05 08:06:33)

litemotiv

Forum Fellow

Registered: 2008-08-01

Posts: 5,026

Re: ATI Radeon - xrandr dual screen problem

i don't have a solution, but i can tell you that i've tried many xrandr settings on my Vaio fw31 without much success. it might be buggy behaviour of the driver which needs fixing..

---

ᶘ ᵒᴥᵒᶅ

mgzzy

Member

Registered: 2007-05-11

Posts: 20

Re: ATI Radeon - xrandr dual screen problem

Your problem may be related to ones listed in "Known Issues" here: www2.ati.com/drivers/linux/catalyst_95_linux.pdf

If you get dualscreen work please let me now, I'm thinking about buying an ATI card soon.

underflow

Member

Registered: 2009-06-04

Posts: 3

Re: ATI Radeon - xrandr dual screen problem

Thank you litemotiv and mgzzy.

If I find the problem and/or a solution, I'll post here and let u know.

R00KIE

Forum Fellow

From: Between a computer and a chair

Registered: 2008-09-14

Posts: 4,734

Re: ATI Radeon - xrandr dual screen problem

You may want to take a look at this page if you haven't done it before http://www.thinkwiki.org/wiki/Xorg_RandR_1.2

---

R00KIE
Tm90aGluZyB0byBzZWUgaGVyZSwgbW92ZSBhbG9uZy4K