KDE stuck @ 1024x728, when xorg.conf has 1280x1024

BuckRogers01 · 03-09-2006, 04:22 PM

Hi, I have an annoying problem where I can't change my KDE resolution higher that 1024x728, however in xorg.conf the only resolution I've entered is 1280x1024 (which is what I want)

Does anyone know how to make KDE use the resolutions in xorg.conf.

Thanks in advance, Buck

P.S. I'm setting the resolution in Contro,Centre>Peripherlas>Display

Finlay · 03-09-2006, 05:25 PM

are you sure you have the correct settings for your monitor and graphics card in xorg.conf? if the horizontal/vertical frequencies are wrong or you have the wrong video driver selected you may not be able to go that hight.

BuckRogers01 · 03-09-2006, 05:28 PM

Well, first I know my monitor can support 1280x1024

Second, I used a generated xorg.conf from a Ubuntu live CD (which I have done before and worked fine), However when I'm in Control centre, the only resolutions I can select are 1024x728 and below

I can't remember if I had this problem before and how I solved it

P.S. I'm using Gentoo

rickh · 03-09-2006, 05:28 PM

Also might help if we knew what kind of video card/adapter you have. Could be a driver issue. Course, if you're running Gentoo, that should mean you're fairly sophisicated in that sort of thing.

Have you actually edited xorg.conf?

BuckRogers01 · 03-09-2006, 05:41 PM

I have a Radeon X850 XT PE (using the VESA driver at the moment)
I've edited xorg.conf:
Added my resolution that I wanted "1280x1024"
Added 32bit depth
Changed default to 32bit depth
Ubuntu tries to use ATI driver for my card. so changed to VESA

BuckRogers01 · 03-09-2006, 05:42 PM

Thanks so far

Finlay · 03-09-2006, 05:54 PM

why don't you use the ati driver?

rickh · 03-09-2006, 05:58 PM

Try changing the 'depth' to 24 ... I don't know if there really is such a thing as 32-bit depth, but if there is, I think it's pretty likely that the vesa drivers for that card don'r support it. I have an ATI Radeon card, and vesa drives it at 1280x1024, no problem. In the long run, tho, you want to get the ATI driver working.

Another thought I just had, I couldn't get 1280x1024 with VESA drivers in xorg version 6.8 ... that happened when I upgraded to version 6.9

BuckRogers01 · 03-10-2006, 12:31 PM

sorted, when I first started the Ubuntu LiveCD and copied the xorg.conf, I set the resolution to 1280x728 (by accident) and then changed it later on.

However I recopied another Ubuntu LiveCD xorg.conf while selecting the correct resolution, and all is fine.

I'm just about to get the ATI propietry drivers working, now that they've released some that support my card.

Thanks for you help anyway, Buck

BuckRogers01 · 03-10-2006, 12:34 PM

Heres what was wrong, in my old xorg.conf my horizontal sync was set to 30-60 (which must have been because of the weird resolution) But in the new xorg.conf the sync is set to 30-65

Didn't know that could make a difference.

Windows uses 32bit colour, so with the ati drivers I'll see what I can do

BuckRogers01 · 03-10-2006, 02:25 PM

Just incase you wanted to know, I got 3D Acceleration working on my card using the ATI HOWTO @ gentoo-wiki (search for ATI).

I had to change the bus ID of my card, then comment out a module, now I get 10000+ frames on glxgears

tomdkat · 03-10-2006, 03:02 PM

You know, I had a similar problem (even though I'm using XFree86). My monitor supports 1280x1024 @ 60Hz but X wouldn't crank up higher than 1024x768. It turned out to be the UsePreferredMode option had to be disabled.

Here is the info on that option:

Quote:

Originally Posted by XFree86 doc

Option "UsePreferredMode" "boolean"
Controls whether or not a preferred mode, either detected from the monitor's DDC/EDID data or provided explicitly with the PreferredMode option, is used. Default: true.

Once I disabled this, the 1280x1024 settings I had in my XF86Config file (moral equivalent of xorg.conf) worked just fine.

Peace...