Arch Linux

snack

Member

From: Italy

Registered: 2009-01-13

Posts: 861

Dual monitor with XRandR 1.3 and catalyst

Hi, I'm trying to setup a dual monitor configuration using xrandr 1.3 and catalyst 9.5 driver on a Mobility Radeon HD3470. Here's my xorg.conf:

Section "ServerLayout"
    Identifier     "X.org Configured"
    Screen      0  "Screen0" 0 0
EndSection

Section "Device"
        Identifier      "HD3470"
        Driver          "fglrx"
        BusID           "PCI:1:0:0"
        # Monitor options:   radeon    radeonhd    catalyst
        #          laptop         LVDS      PANEL        LCD
        #         external       VGA-0     VGA_1        CRT1
        Option         "monitor-CRT1" "VGA"
        Option         "monitor-LCD" "LAPTOP"
EndSection

Section "Monitor"
        Identifier      "LAPTOP"
        Option          "PreferredMode" "1280x800"
        #Option          "DPMS" "true"
EndSection

Section "Monitor"
        Identifier      "VGA"
        Option          "PreferredMode" "1280x1024"
        Option          "RightOf"  "LAPTOP"
EndSection

Section "Screen"
        Identifier     "Screen0"
        Device         "HD3470"
        Monitor        "LAPTOP"
        DefaultDepth 24
        SubSection     "Display"
                Modes           "1280x800"
                Depth           24
                Virtual         2560 1024
        EndSubSection
EndSection

The graphical environment starts, but the external monitor is black, even if I can move and see the mouse pointer on it. Here's the xrandr output:

$ xrandr
Screen 0: minimum 320 x 200, current 2560 x 1024, maximum 2560 x 1024
LCD connected 1280x800+0+0 (normal left inverted right x axis y axis) 330mm x 210mm                                                                       
   1280x800       59.8*+                                                     
   1280x768       59.8                                                       
   1280x720       59.8                                                       
   1024x768       59.8                                                       
   800x600        59.8                                                       
   720x480        59.8                                                       
   640x480        59.8                                                       
   640x400        59.8                                                       
   512x384        59.8                                                       
   400x300        59.8                                                       
   320x240        59.8                                                       
   320x200        59.8                                                       
DFP1 disconnected (normal left inverted right x axis y axis)                 
DFP_EXTTMDS disconnected (normal left inverted right x axis y axis)          
CRT1 connected 1280x1024+1280+0 (normal left inverted right x axis y axis) 376mm x 301mm                                                                  
   1280x1024      60.0*+   75.0     60.0*                                    
   1280x960       60.0                                                       
   1280x800       60.0                                                       
   1152x864       75.0     60.0                                              
   1280x768       59.9                                                       
   1280x720       60.0                                                       
   1024x768       75.0     60.0                                              
   800x600        75.0     60.3                                              
   720x480        60.0                                                       
   640x480        75.0     60.0                                              
   640x400        75.1     59.9                                              
   512x384        60.0     74.9                                              
   400x300        75.0     60.7                                              
   320x240        75.6     60.0                                              
   320x200        75.5     60.1

It seems a problem with xrandr, but turning off the external monitor with:

xrandr --output CRT1 --off

and then setting up by hand a dual screen with:

xrandr --output LCD --mode 1280x800 --output CRT1 --mode 1280x1024 --right-of LCD

everithing works fine. So I think it is a problem in my xorg.conf: I serched over the web but I found no useful information.
Can anyone please help me? Thanks

karol

Archivist

Registered: 2009-05-06

Posts: 25,440

Re: Dual monitor with XRandR 1.3 and catalyst

> the external monitor is black, even if I can move and see the mouse pointer on it
http://bugs.archlinux.org/task/20186
Did you report it or is it sb else?

Cyrusm

Member

From: Bozeman, MT

Registered: 2007-11-15

Posts: 1,053

Re: Dual monitor with XRandR 1.3 and catalyst

just as a workaround, you can put the xrandr commands in your .xinitrc instead of your xorg.conf.  This is how I've always done it and I've never had any problems.

---

Hofstadter's Law:
           It always takes longer than you expect, even when you take into account Hofstadter's Law.

karol

Archivist

Registered: 2009-05-06

Posts: 25,440

Re: Dual monitor with XRandR 1.3 and catalyst

> put the xrandr commands in your .xinitrc instead of your xorg.conf.
+1
Especially that you don't need xorg.conf anymore.

dcc24

Member

Registered: 2009-10-31

Posts: 732

Re: Dual monitor with XRandR 1.3 and catalyst

Really guys?? You are digging up a thread more than a year old and for what? Asking whether the OP reported a bug? Seriously?

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It is better to keep your mouth shut and be thought a fool than to open it and remove all doubt. (Mark Twain)

My AUR packages

karol

Archivist

Registered: 2009-05-06

Posts: 25,440

Re: Dual monitor with XRandR 1.3 and catalyst

Ooooh, I'm a bad boy, I need sb to spank me.

Inxsible

Forum Fellow

From: Chicago

Registered: 2008-06-09

Posts: 9,183

Re: Dual monitor with XRandR 1.3 and catalyst

Ooooh, I'm a bad boy, I need sb to spank me.

karol karol karol !!

Tsk Tsk Tsk !

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Forum Rules

There's no such thing as a stupid question, but there sure are a lot of inquisitive idiots !

Cyrusm

Member

From: Bozeman, MT

Registered: 2007-11-15

Posts: 1,053

Re: Dual monitor with XRandR 1.3 and catalyst

Really guys?? You are digging up a thread more than a year old and for what? Asking whether the OP reported a bug? Seriously?

oops I should really get in the habit of reading the date on the OP -.- shame on me....

---

Hofstadter's Law:
           It always takes longer than you expect, even when you take into account Hofstadter's Law.

ngoonee

Forum Fellow

From: Between Thailand and Singapore

Registered: 2009-03-17

Posts: 7,356

Re: Dual monitor with XRandR 1.3 and catalyst

Well, this thread has certainly outlived its usefulness *spanks karol*

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