No xorg.conf found in /etc/X11 (Ubuntu 10.04)

[AtliThor]

Hey.

I'm trying to get a second monitor working on a Acer laptop running 10.04. It seems to work; the monitor is recognized and automatically configured (which is very nice, by the way!).

However, the monitor's refresh rates seem to be configured incorrectly. I thought "no problem, I'll just tweak the xorg.conf"... only to find that there is no such file. - I've used this monitor (A 19'' Acer LCD) before on this laptop, using an older version of Ubuntu (8.10 and 9.04), so it should be compatible.

Reading other threads here, I tried using a few versions of:

sudo dpkg-reconfigure xserver-xorg

But none of them really did anything, and no xorg.conf has shown up yet.

Any help would be appreciated.

A few spec highlights:

• Acer Aspire 5670
• ATI Radeon Mobility X1600
  "Mesa"/"radeon" driver. Auto intalled by Ubuntu.
• Acer AL1916 (The extra LCD)
  Ubuntu identifies it as "Acer technologies 19''"

Thanks,
- Atli

[diesch]

Current version of X.org don't use a xorg.conf by default but try to recognize everything automatically. If you create a xorg.conf it will be used.

https://wiki.ubuntu.com/X/Config/Resolution may be helpful, too

[AtliThor]

Thanks diesch. That link was a big help.

I've managed to use the xrandr command to modify the refresh rate, but I still can't seem to manage to sync the horizontal and vertical rates so the screen stops flickering.

Closest I've gotten so far is to use:

$ gtf 1280 1024 60

to generate a Modeline, and then apply that to the screen by doing:

$ xrandr --newmode "1280x1024_60.00"  108.88  1280 1360 1496 1712  1024 1025 1028 1060  -HSync +Vsync
$ xrandr --addmode VGA-0 "1280x1024_60.00"
$ xrandr --output VGA-0 --mode "1280x1024_60.00"

The screen still flickers, but not as badly as it used to. It's more like a slow "wobble" right now
Still unusable, of course, but I'm getting closer (I think).

Thanks again.

[tbobo05]

Seems I am having the same problem, I just upgraded from 9.10 to 10.04 Beta 2.

Using a atix1250 and an external Samsung SyncMaster2333.

Have you made any leadway?

I will start playing with the xrandr commands this weekend to see if I can come up with a acceptable fix.

[|2eason]

The screen still flickers, but not as badly as it used to. It's more like a slow "wobble" right now
Still unusable, of course, but I'm getting closer (I think).

Thanks again.

I have a similar config to you and I tried 59.5 for the refresh. Works fines, no flickering. Now I just need to figure out how to generate a new xorg.conf to get the settings to persist.

[seamustry]

how do i use "xrandr" to manually set my laptop's main resolution? i dont have any external monitors...

[at0msk]

Is it possible to edit the xorg.conf file? It says it's owned by root and I can't make any changes.

[baseballguy]

This works you should place this as solved

Thanks diesch. That link was a big help.

I've managed to use the xrandr command to modify the refresh rate, but I still can't seem to manage to sync the horizontal and vertical rates so the screen stops flickering.

Closest I've gotten so far is to use:

$ gtf 1280 1024 60

to generate a Modeline, and then apply that to the screen by doing:

$ xrandr --newmode "1280x1024_60.00"  108.88  1280 1360 1496 1712  1024 1025 1028 1060  -HSync +Vsync
$ xrandr --addmode VGA-0 "1280x1024_60.00"
$ xrandr --output VGA-0 --mode "1280x1024_60.00"

The screen still flickers, but not as badly as it used to. It's more like a slow "wobble" right now
Still unusable, of course, but I'm getting closer (I think).

Thanks again.

[entodoays]

Hi all,

I also need to create an xorg.conf file but only to set a couple of parameters and do not wish to mess with the rest. Can an xorg.conf file have only partial information, say for the touchpad only or would this block my computer?

I'm actually using Ubuntu 10.10.

Thanks,