Bad Screen Resolution with ATI

English Hardware
1

Hi

I have opensuse 13.1 with ATI HD6800 series, i have 3 monitors, Two of them works fine, but the third one fails to get the right resolution.

  1. this monitor is lcd but it is connected with dvi > vga adapter

  2. The right resolution is 1680x1050 (in windows works fine if i force the resolution with ati catalyst)

  3. In Opensuse the automatic resolution is 1600x1200 and i haven’t 1680x1050 resolution to choice it.

I use the next command i find in internet without success:

$cvt 1680 1050 60

# 1680x1050 59.95 Hz (CVT 1.76MA) hsync: 65.29 kHz; pclk: 146.25 MHz
Modeline "1680x1050_60.00"  146.25  1680 1784 1960 2240  1050 1053 1059 1089 -hsync +vsync

$xrandr --newmode "1680x1050_60.00"  146.25  1680 1784 1960 2240  1050 1053 1059 1089 -hsync +vsync

$xrandr --addmode default "1680x1050_60.00"

$xrandr --output CRT1 --mode "1680x1050_60.00"

xrandr: Configure crtc 2 failed

I try many things but no one works…

Any idea?

thank you for your help!