Mailinglist Archive: radeonhd (308 mails)

[Matthias Hopf <mhopf@xxxxxxx>]

On Mar 17, 08 11:47:11 -0400, Leif Gruenwoldt wrote:
> $ xrandr

Please paste the output of xrandr --verbose

> Manually setting it to the native causes the display to go black.
> $ xrandr --output DVI-D_1 --mode 1920x1200

Again, please try xrandr --verbose --output DVI-D_1 --mode 1920x1200
and paste the output.

The log looks good, saying for DVI-D_1:
(II) RADEONHD(0): Modeline "1920x1200"x60.0  154.00  1920 1968 2000 2080  1200 
1203 1209 1235 +hsync -vsync (74.0 kHz)

OTOH - can you verify your Xserver version? There was one infamous sync
polarity bug.
Please try

  xrandr --newmode 1920x1200_a 154.00  1920 1968 2000 2080  1200 1203 1209 1235 
+hsync -vsync
  xrandr --newmode 1920x1200_b 154.00  1920 1968 2000 2080  1200 1203 1209 1235 
-hsync +vsync
  xrandr --addmode DVI-D_1 1920x1200_a
  xrandr --addmode DVI-D_1 1920x1200_b

(might need a newer xrandr for that, or try +HSync or +Hsync, and vice
versa with vsync, even mixed cases).

and then setting

  xrandr --verbose --output DVI-D_1 1920x1200_a

or 1920x1200_b, respectively.

> The following info from my Xorg.0.log seems highly suspicious:
>
> (II) RADEONHD(0): Not using mode "1920x1200" (mode clock too high)

No, just the default non-reduced-blanking 1920x1200 has a too high clock
rate.

Matthias

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Matthias Hopf <mhopf@xxxxxxx>      __        __   __
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