I am unable to change my screen resolution to 1280 x 1024. I have a 19" monitor but can not set it to anything above 1024 x 768. I installed Slackware 9.1 earlier today and am using Gnome. When I press <CTRL><ALT><+> I only changes to lower resolutions. At the moment I have both Slackware 9.1 and Red Hat 9 installed on my computer. I have used Red Hat for a couple of years at home but am new to Slackware. Red Hat 9 has no problem using the higher settings but I can not get Slackware to do that.

I also tried selecting Applications ---> Desktop Preferences ---> Screen Resolution. I was then given only three choices to choose between, they were 640 x 480, 800 x 600, and 1024 x 768. There were no higher resolution choices available.

Next, I tried using vi to look at the /etc/X11/XF86Config file. I tried adding "1280x1024" and "1152x864" to a line in the Display subsection. I changed that same line in each of the 8, 16, 24 and 32 color depth setting subsections. The line that I changed in each section ended up looking like this:

Modes "1280x1024" "1152x864" "1024x768" "800x600" "640x480"

That change did not make any difference. I do not know much about editing the XF86Config file. But, I have tried comparing the XF86Config file in Red Hat 9 to the one in Slackware 9.1. One difference that I have noticed is that the Red Hat 9 version has a subsection called "Device" in which the "Driver" is listed as "nv". It also mentions the "BoardName as "NVIDIA GeForce 2 MX (generic)". It lists the "VideoRam" as 65536. Below is the most similar looking section that I could find in Slackware:

Section "Device"
Identifier "VESA Framebuffer"
Driver "vesa"
#VideoRam 4096
# Insert Clocks lines here if appropriate
EndSection

Is that difference the problem? There may be other differences in the XF86Config files that I have not yet noticed. What should I do next? I did make a backup copy of my original XF86Config file by the way. If this file is the problem, do I need to edit it manually or is there some other tool that I can use instead?

P.S, I have not yet tried running xf86config or xf86cfg-textmode to reconfigure X-Windows. Should I try that next? Would xf86config also allow me to get the wheel on my PS2 mouse to work? At the moment I can click the wheel to past but, turning the wheel does not do anything.

Well, it has been several hours and nobody has yet responded. In the meantime I went to the Slackware.com webpage and read some about using xf86config. It suggests that I shoud use the command "SuperProbe" first to find out as much as possible about my monitor and video card before using xf86config. I tried typing SuperProbe while logged in a root and it said the command was not found. Next, I then tried searching for the command by typing this while I was at the root directory:

find -name SuperProbe

It did not find anything. Is SuperProbe no longer included with Slackware 9.1? I did a full install from the CDs that I ordered directly from Slackware. Perhaps I already know enough about my videocard and monitor to go ahead and use xf86config without running SuperProbe first. I know that it is a PNY Verto GeForce2 MX 400 AGP video card with 64MB SDRAM. I am not totally sure what the chipset is, although I believe it is probably a GeForce 2 MX 400 chipset. Perhaps I should use Google to check those details. The monitor is a 19" Phillips 109B. I know the vertical and horizontal sync and vertical refresh settings for both the monitor and video card. Below is the page that I found a few minutes ago that describles how to use xf86config. I had forgotten that there is both a file named XF86Config and a program named xf86config. I hope that works.

http://slackware.com/book/index.php?...tml#XF86CONFIG

xf86config was able to fix the problem, the display is now set to 1280x1024. My 19" monitor now looks much better at that resolution. I used xf86config to create a new XF86Config file. I kept the original as a backup just in case I had to go back to it. The instructions for using xf86config in the book on the Slackware web page does not totally match what the program asks. I wish the Slackware.com website would update their instructions. But it worked. When I press <CTRL><ALT><+> I can now cycle through various other screen resolutions too.

The wheel on my mouse still does not work except for the click-paste thing.

Well, the display resolution problem is fixed but I am wondering if it would have been easier to have used this command instead:

XFree86 -configure

A few minutes ago I saw another post where someone said that they prefer using that instead. I did not see that metioned anywhere on the Slackware.com website.

About the mouse wheel, if you just add the code below into your Xorg.conf file, you'll get mouse wheel action:

In the section InputDevice

make sure the protocol is IMPS/2

Option "Protocol" "IMPS/2"

and add

Option "ZAxisMapping" "4 5"


That should get your mouse wheel working

hi
I have get problem the same as you, can you tell me how did you let your display chage to 1280*1024 ?

Hi liuguobiao - you may have used the search tools and so not noticed but this thread is four years old. I doubt these people still even look in here !

You'd stand a much better chance of getting help if you started a new thread and asked the mods to close this one. Threads with no answers get priority a lot of times.

I'd start by telling people what versions of Slackware, kernel, hardware (machine), install type, etc you have and what steps you have done to solve the problem if any.

Also what exactly the problem is..