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Hello, Unregistered You are browsing a READ only archive of the main support categories pre 4/21/2008. You will not be able to post or reply any threads in this section.
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Hardware & Laptops Problems with hardware & laptops not being detected or supported during or after install. |
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Thread Tools | Display Modes |
November 8th, 2007
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#1 | ||
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First Cup of Ubuntu
 Join Date: Nov 2007
Beans: 2
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Problem with Dual monitor. ATI Radeon 9000
Hello,
I recently installed Kubuntu Gutsy 7.10 on a Dell Latitude D600 w ATI Radeon Mobility 9000. The laptop monitor is capable of resolutions up to 1400x1050 and I have an external monitor (DELL 2407WFP-HC) which is capable of resolutions up to 1920x1200. I use the open source 'ati' or 'radeon' driver. The problem is that I cannot set the external monitor to work at the max resolution. The best resolution I can get is 1280x1024@75Hz. Xrandr recognizes the resolutions of the external monitor without (obvious) problem. Quote:
When I try to use resolutions larger than 1280x1024 I get a black screen. The monitor LED is on, which means that it receives signal from the laptop but remains black. The monitor does not show any "out of range" error message. I have tried to play with Xinerama, MergeFB without success, Here is the relevant part of my xorg.conf file Quote:
Thanks for your time. |
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November 15th, 2007
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#2 |
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First Cup of Ubuntu
Join Date: Jul 2005
Beans: 2
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Re: Problem with Dual monitor. ATI Radeon 9000
I'm also having this problem.
Strange thing is, the background is stretched across the whole resolution, but the gnome bars both stop as if the monitor wasn't widescreen! Any tips? |
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November 18th, 2007
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#3 | |
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First Cup of Ubuntu
Join Date: Oct 2007
Location: Toronto
Beans: 5
Ubuntu 6.06 Dapper
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Re: Problem with Dual monitor. ATI Radeon 9000
Hi everyone,
Are you guys trying to use your exteranl monitor as your primary desktop, or as a second display (big desktop). I've had a similar experience with my Dell 600m radeon mobility 9000 64mb, although to clarify, my external display only mirrors the primary (with the menu bar anomally already mentioned). The only luck I've had in getting dual display working was to install 6.06 and edit the xorg.conf file extensively... Would love to have it working with the current desktop Os however... here is my working xorg.conf file in Ubuntu 6.06, trying to update/modify for 7 or 7.10... the only main differance I can tell imediatly is that the previous xorg.conf file posted has only one ATI "device" (each "screen" needs to be linked to it's own ATI "device"), not sure if that matters in ubuntu 7+ Quote:
Last edited by Scothiam; November 18th, 2007 at 04:27 PM.. Reason: condensed |
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December 2nd, 2007
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#4 |
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First Cup of Ubuntu
Join Date: Nov 2007
Beans: 2
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Update: Problem with Dual monitor. ATI Radeon 9000
Update:
After several days of trial and error I have found the following. a. I was not able to get the resolution I want using mergedFB or Xinerama, b. xrandr seems to be the only method to get dual monitor support however I cannot get a resolution of 1400x1050 on laptop monitor and 1900x1200 on the external monitor at the same time. c. I can get the dual monitor when I use 1400x1050 on the laptop monitor and up to 1280x1024 on the external monitor. Any resolution above that results to a black external screen. The commands I use are: $ xrandr --output LVDS --mode 1400x1050 $ xrandr --output DVI-0 --left-of LVDS --mode 1280x1024 and in the xorg.conf I have set a virtual desktop of 3320x1200 d. Using xrandr and single monitor output I am able to get the 1400x1050 on the laptop monitor and up to 1680x1050 on the external monitor. The commands I use are: $ xrandr --LVDS --off $ xrandr --DVI-0 --mode 1680x1050 --rate 60.0 It seems that any resolution with vertical resolution >1050 does not work. I do not know if this is a limitation of the radeon driver or a limitation imposed by the maximum vertical resolution of the laptop. Any ideas welcome. |
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January 18th, 2008
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#5 |
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First Cup of Ubuntu
Join Date: Dec 2007
Beans: 2
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Re: Problem with Dual monitor. ATI Radeon 9000
Hi eyeblack,
there really seems to be no way to scale up the resolution, I have also tried out a lot of things and ripped out a bunch of my hair as well...  I am also working with a D600 Notebook at the native resolution of 1400*1050 and attached the same monitor as you. At least I would like to make use of the 1680x1050 widescreen resolution instead of stretched 1280x1024. Single monitor support would be sufficient. Could you post again your configuration for that single screen mode?When I run xrandr the widescreen resolutions are not listed  Do you also know a way how to automatically switch to the external screen at startup automatically. I am sorry that I could not provide further hints on your problem - except that I also read a lot of posts without result. I would really appreciate to receive an answer from your side. Thanks a lot in advance. ! |
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January 18th, 2008
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#6 |
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Deprecated
 Join Date: Jun 2007
Location: PA, USA
Beans: 5,204
Ubuntu 9.10 Karmic Koala
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Re: Problem with Dual monitor. ATI Radeon 9000
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