xorg.conf settings problem

[seminole67]

Just installed Centos 4.4. and video is has flickering verticl lines distorting the graphic image. I am using a Alpine PCI video card with Cirrus Logic GD5434-8 (rev. fc) and a Mitsubishi Diamond Pro 700 (TFK9705) monitor. Both are supported, but no resolution is stable. What changes can be made to xorg to correct this?

[stumbles]

Try running xorgcfg and create a new xorg.conf.

[seminole67]

Just installed Centos 4.4, but have flickering vertical lines the X11 graphical interface. A Alpine Cirrus Logic GDF5434-8 (rev fc) and a Mitsubishi Diamond Pro 700 (TFK9705) monitor were both found by the software. What modifications to xorg.conf can be made to correct the problem?

[seminole67]

Response to command: xorgcfg
command not found

[stumbles]

Then try /usr/bin/xorgconfig . You of course have to be root to run it or xorgcfg.

[seminole67]

got back: no such file or directory. I am in root. I also tried /usr/bin/xorgcfg and got the same response.

Any other suggestions?

[mrrangerman43]

seminole67

I am in root.

He doesn't mean in the root dir. you need to be logged in as root/super user. To tell if you are root your prompt will have a # sign prefixing your command. If your prompt looks something like this [name@name.come]$ then you are logged in as a user and not root.

[seminole67]

I meant I was logged in at root and was at the # sign.
Thanks for you clarification.

[voidinit]

If you look at the .inf from the windows driver for that monitor it says:


[TFK-9705.AddReg]
HKR,"MODES\1600,1200",Mode1,,"30.0-95.0,50.0-152.0,+,+"
HKR,,MaxResolution,,"1600,1200"
HKR,,DPMS,,1
HKR,,ICMProfile,1,6


So check your "monitor" section (or equivalent) in xorg.conf and see what the values of HorizSync and VertRefresh were detected as. Then make sure they are 30.0-95.0 for HorizSync and 50.0-152.0 for VertRefresh. Also make sure you aren't trying to do over 1600x1200 resolution.

I've had several cases where automated XFree86 and Xorg configuration tools mis-probed these values, and that resulted in no display, or a flickery one.

[seminole67]

Thanks for all your help. I solved my own problem. I found the specs on the video card which showed it would only support 256 colors on 1024x768. I then changed the colors to 256 and viola, the problem went away.