Modeline problem with Radeon KMS
Meelis Roos
mroos at linux.ee
Wed Jun 8 08:31:29 PDT 2011
> > 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)
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