Modeline problem with Radeon KMS

[Meelis Roos]

> > I have LG Flatron F900P CRT monitor. X drivers work fine, nouveau KMS
> > works fine but Radeon KMS selects a videomode that is out of spec for
> > monitor. This is not a regression - this hardware combination has never
> > worked for me yet with radeon KMS. The result is same for Radeon 7000
> > (RV100, currently installed) and Radeon 9200 series card.

Umm, I guess I forgot one important aspect. When X comes up, it finds a 
good video mode and gets a picture. It's just the text consoles that 
have no picture.

In the console, it tells it's using 352x132 console. This translates 
with 8x16 font to 2816x2112 and 9x16 font to 3168x2112 if I calculated 
the right thing.

Running fbset remotely verifies this:

# fbset -s </dev/tty1 

mode "2816x2114"
    geometry 2816 2114 2816 2114 8
    timings 0 0 0 0 0 0 0
    accel true
    rgba 8/0,8/0,8/0,0/0
endmode

So it decides this modeline is usable for the console while it is not.

> Is it just 2048x1536 that's causing problems?  Do any other modes
> work?  1600x1200 for example?

X uses 2048x1536 successfully. 1600x1200, 1920x1440, 1280x1024 all work 
fine, just tested with xrandr.

> > [    36.111] (II) RADEON(0): Output VGA-0 using monitor section CM771
> 
> I notice you have a monitor section defined in your xorg.conf.  Does
> that monitor section perhaps have any old modelines from an old
> monitor that may be causing problems?

X without configuration also gets a working 2048x1536.

X conf seems to be quite irrelevant - scree-related things here, and my 
list of resolutions is ignored anyway for some reason not important 
righh now.

Section "Device"
        Identifier      "AGP kaart"
        Driver          "ati"
        Option          "AGPMode" "2"
EndSection

Section "Monitor"
        Identifier      "CM771"
        Option          "DPMS"
EndSection

Section "Screen"
        Identifier      "Default Screen"
        Device          "AGP kaart"
        Monitor         "CM771"
        DefaultDepth    24
        SubSection "Display"
                Depth           1
                Modes           "1280x960" "1024x768" "832x624" "800x600" "720x400" "640x480"
        EndSubSection
        SubSection "Display"
                Depth           4
                Modes           "1280x960" "1024x768" "832x624" "800x600" "720x400" "640x480"
        EndSubSection
        SubSection "Display"
                Depth           8
                Modes           "1280x960" "1024x768" "832x624" "800x600" "720x400" "640x480"
        EndSubSection
        SubSection "Display"
                Depth           15
                Modes           "1280x960" "1024x768" "832x624" "800x600" "720x400" "640x480"
        EndSubSection
        SubSection "Display"
                Depth           16
                Modes           "1280x960" "1024x768" "832x624" "800x600" "720x400" "640x480"
        EndSubSection
        SubSection "Display"
                Depth           24
                Modes           "1280x960" "1024x768" "832x624" "800x600" "720x400" "640x480"
        EndSubSection
EndSection


-- 
Meelis Roos (mroos at linux.ee)