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Old 10-23-2009, 09:57 AM   #1
fcx
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Trying to set up Dual Heads in Fedora 11


The problem seems to be that even though I can set up a dual head desktop, one of my monitors drops into powersave mode (so only half of my desktop is visible). If I mirror, still, one monitor decides to go into powersave mode.

When I boot, both monitors turn on, when GRUB comes up, I still have 2 monitors. I have 2 (mirrored) monitors on up until I get to the X logon screen. Then one or the other decides to turn off. It is consistent. Though I cannot figure out which setting in the "Display" app is making the choice (left or right/ 1 or 0 -- 1 being my left, it is the deciding factor)

Tech specs:
------------------------
--I am running Fedora 11

# uname -a
Linux f11.mydomain.com 2.6.30.8-64.fc11.x86_64 #1 SMP Fri Sep 25 04:43:32 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux

------------------------
--I am running X11 v1.6.3.901

# X -version

X.Org X Server 1.6.3.901 (1.6.4 RC 1)
Release Date: 2009-8-25
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.18-164.el5 x86_64
Current Operating System: Linux rsm.amcity.com 2.6.30.8-64.fc11.x86_64 #1 SMP Fri Sep 25 04:43:32 EDT 2009 x86_64
Kernel command line: ro root=/dev/mapper/vg_rsm-LogVol00 rhgb quiet
Build Date: 09 September 2009 11:26:05AM
Build ID: xorg-x11-server 1.6.4-0.1.fc11
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.


------------------------
--I have an ATI Radeon 3470:
#lspci
...
01:00.0 VGA compatible controller: ATI Technologies Inc Mobility Radeon HD 3470 (prog-if 00 [VGA controller])
Subsystem: Dell Device 3243
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at d0000000 (64-bit, prefetchable) [size=256M]
Memory at fe9f0000 (64-bit, non-prefetchable) [size=64K]
I/O ports at dc00 [size=256]
Expansion ROM at fea00000 [disabled] [size=128K]
Capabilities: [50] Power Management version 3
Capabilities: [58] Express Legacy Endpoint, MSI 00
Capabilities: [a0] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [100] Vendor Specific Information <?>
Kernel driver in use: radeon
Kernel modules: radeon
...


------------------------
--I have 2 Dell (Deltec) 24" S2409W monitors:

# xrandr
Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 3840 x 1920
DisplayPort-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 531mm x 298mm
1920x1080 60.0*+
1280x1024 75.0 60.0
1152x864 75.0
1024x768 75.0 60.0
800x600 75.0 60.3
640x480 75.0 59.9
720x400 70.1
DisplayPort-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 298mm
1920x1080 60.0*+
1280x1024 75.0 60.0
1152x864 75.0
1024x768 75.0 60.0
800x600 75.0 60.3
640x480 75.0 59.9
720x400 70.1
 
Old 10-24-2009, 08:25 PM   #2
lleb
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sadly i do not know the ATI setup for dual display, but you will need to edit the xorg.conf file to setup the dual screen as far as i know.

http://www.ssma.us/debian_media.html

that is WAY old, but the basics for the xorg.conf are there. hope it at least points you in the right direction.
 
Old 10-27-2009, 02:12 PM   #3
fcx
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Yes, thanks. Actually, I had read that I should try ati.com for a newer driver. Actually, I had read I should not try that and should stick with "distro-approved" drivers, but that was not working.

So I went to ati.com and downloaded the driver.tar for linux dated 10/22/2009 and used the aticonfig bin util to set up my dual heads. It worked... so far no remorse. :-)
 
Old 10-31-2009, 12:16 PM   #4
lleb
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glad it is working for you. yeah i wrote that when i was first getting into linux. i for one use the drivers from the manufactures more often then from the linux distro supplied.

i understand the reason for use the one supplied by the distro, but sometimes those drivers just dont work. the drivers from the card makers seem to always work. /shrug
 
  


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