View Full Version : [xubuntu] Cannot set 1680*1050 on external monitor

September 14th, 2009, 05:38 PM
Hello, I'm trying to get my acer aspire one and my samsung 22' screen to work together. But I can't seem to get the native resolution to run. I tried with xrandr, but it always errors out

first i looked if the resolution was supported by issuing
xrandr in terminal, i got the folowing output:
Screen 0: minimum 320 x 200, current 800 x 600, maximum 1360 x 1360
VGA connected 800x600+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1360x768 59.8
1152x864 60.0
1024x768 60.0
800x600 60.3*
640x480 59.9
LVDS connected 800x600+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1024x600 60.0 +
800x600 85.1 72.2 75.0 60.3* 56.2
640x480 85.0 72.8 75.0 59.9
720x400 85.0
640x400 85.1
640x350 85.1

so, 1680*1050 was not there, so I tried adding a new displat resolution like this:

zorofroozo@Zorofroozo-nettop:~$ gtf 1680 1050 60
# 1680x1050 @ 60.00 Hz (GTF) hsync: 65.22 kHz; pclk: 147.14 MHz
Modeline "1680x1050_60.00" 147.14 1680 1784 1968 2256 1050 1051 1054 1087 -HSync +Vsync

now i had all the needed information so i fed it to xrandr,

xrandr --newmode "1680x1050_60.00" 146.25 1680 1784 1960 2240 1050 1053 1059 1089 -hsync +vsync
but that didn't work at all, it just showed an error

X Error of failed request: BadName (named color or font does not exist)
Major opcode of failed request: 150 (RANDR)
Minor opcode of failed request: 16 ()
Serial number of failed request: 23
Current serial number in output stream: 23

i tried googling the error, and parts of the error, but i failed to get any solution. I really hope you guys can help me. 800*600 on a 22' isn't really nice to look at

September 14th, 2009, 06:01 PM
What type of graphics chip is on the Acer? If it's Intel, it probably can't support the horizontal refresh required to paint 1680 pixels.

xrandr says 1360x1360 max which implies that it can only go to 1360 pixels horizontally.

What does the following say:

cat /var/log/Xorg.0.log

September 15th, 2009, 12:18 AM
I got it working.

xrandr --fb 1680x1050 --output VGA --mode 1680x1050 --output LVDS --mode 1024x600 --panning 1680x1050+0+0 did the trick

thx for your help