Comments on: Fix screen resolution in Ubuntu – ATI Radeon Mobility 7500

By: Srikumar B

Srikumar B — Thu, 12 Nov 2009 10:53:47 +0000

Hi,
I got the same problem in my IBM R50 thinkpad (contain Radeon Mobility 7500) with Ubuntu 9.10 Karmic. It seems Karmic does not use xorg.conf and i created the file using Xorg -configure then modified the xorg.conf adding the NoDDC line and then restarted the system but it still i am not able to increase the resoultion.

I still suspect, DDC is getting invokde because i observed from xorg.conf.0.log as below:

II) RADEON(0): Port0:
XRANDR name: VGA-0
Connector: VGA
CRT1: INTERNAL_DAC1
DDC reg: 0×60
(II) RADEON(0): Port1:
XRANDR name: DVI-0
Connector: DVI-D
DFP1: INTERNAL_TMDS1
DDC reg: 0×64
(II) RADEON(0): Port2:
XRANDR name: LVDS
Connector: LVDS
LCD1: INTERNAL_LVDS
DDC reg: 0×0
(II) RADEON(0): Port3:
XRANDR name: S-video
Connector: S-video
TV1: INTERNAL_DAC2
DDC reg: 0×0
(II) RADEON(0): I2C device “VGA-0:E-EDID segment register” registered at address 0×60.
(II) RADEON(0): I2C device “VGA-0:ddc2″ registered at address 0xA0.
(II) RADEON(0): Output: VGA-0, Detected Monitor Type: 0
finished output detect: 0
(II) RADEON(0): I2C device “DVI-0:E-EDID segment register” registered at address 0×60.
(II) RADEON(0): I2C device “DVI-0:ddc2″ registered at address 0xA0.
(II) RADEON(0): Output: DVI-0, Detected Monitor Type: 0
finished output detect: 1
(II) RADEON(0): Output: LVDS, Detected Monitor Type: 2
finished output detect: 2

By: srikumar

srikumar — Thu, 12 Nov 2009 06:00:40 +0000

Hi,
I have the same issue on my IBM R50 laptop which is using the Radeon Mobility 7500 card with Ubuntu 9.10 karmic. I tried to do modify xorg.conf but the xorg.conf itself is not available.
I create the file using Xorg -configure and added the line NoDDC and restarted the X server. But i am still unable to see the new resolution.

I looked into the log xorg.conf.log and observed that it is showing some logs related to DDC….

Please suggest me how to set this parameter on karmic which does not has xorg.conf file

By: Osama

Osama — Sat, 08 Aug 2009 03:50:25 +0000

thanksssssssssssssssssssssss

the best tutorial ever

By: Ivan Dario otalvaro

Ivan Dario otalvaro — Wed, 11 Feb 2009 13:46:52 +0000

Thanks, solved my problem had been unable to find a solution.

perfect!

By: Brian

Brian — Wed, 30 Jul 2008 20:59:35 +0000

Worked like a charm for me. I tried following some other fixes but they did not work. This one had my screen resolution resolved in a matter of minutes.
Compaq evo n610c recently upgraded to Hardy Xubuntu.