[RESOLVED] Dual Monitor, xrandr force resolution fails

Screen resolution, 3D Acceleration, nVidia, ATI
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[RESOLVED] Dual Monitor, xrandr force resolution fails

Postby zark on Sat Dec 01, 2012 11:23 pm

I will leave the text below for clarity, but I have a slight improvement on the situation now.

I use a kvm for one of the monitors - the one that isn't recognised. By plugging the monitor straight into the VGA card, all is recognised and is good.
However, if I put the monitor back through the kvm, it goes bad again.

So, right now, I bypass the kvm, however, it does kind of defeat the object of having a kvm for the other pc's if I can't use it.

I guess this issue is resolved, and I should open a new thread for the kvm issue.
I am a new convert from Win7.. I have finally decided to commit to working through the set up pains and run Linux as my new main OS. I am slowly getting through all of the things that I need to work to make this successful for me. I think this is one of the last big issues I am struggling with.

I have been trying to get my dual monitors working via google and forum threads for a couple of days. But no success yet.

One monitor works well and displays at 1920x1080, the second monitor only displays at 1360x768. The monitor that works well is recognised in the Display Dialog as a Samsung monitor, whilst the other one has Unknown. They are plugged into the same NVidia GeFroce GT 630 card.

When trying to work through the xrandr options, I would just get a black screen when entering the last command (-- output VGA-0 ...) and have to do a hard reboot. I eventually installed the nvidia-current drivers, which fixed some screen artefact glitches (some menus/occasional address bar etc).

I tried the xrandr sequence again, but now get an error during the process. System specs are at the bottom of the post..

I would be very happy if someone can help me work through this. Thank you.

First stage:
Code: Select all
$ xrandr
Screen 0: minimum 8 x 8, current 3616 x 1080, maximum 16384 x 16384
DVI-I-0 connected 1920x1080+1696+0 (normal left inverted right x axis y axis) 510mm x 287mm
   1920x1080      60.0*+
   1680x1050      60.0 
   1600x1200      60.0 
   1440x900       75.0     59.9 
   1280x1024      75.0     60.0 
   1280x960       60.0 
   1280x800       59.8 
   1152x864       75.0 
   1024x768       75.0     70.1     60.0 
   800x600        75.0     72.2     60.3     56.2 
   640x480        75.0     72.8     59.9 
VGA-0 connected 1360x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768       60.0 +
   1360x768       60.0*    59.8 
   1152x864       60.0 
   800x600        72.2     60.3     56.2 
   680x384       119.9    119.6 
   640x480        59.9 
   512x384       120.0 
   400x300       144.4 
   320x240       120.1 
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)

Second Stage:
Code: Select all
$ cvt 1920 1080
# 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync

Third Stage - Where the error occurs:
Code: Select all
$ xrandr --newmode 1920x1080 173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
X Error of failed request:  BadName (named color or font does not exist)
  Major opcode of failed request:  140 (RANDR)
  Minor opcode of failed request:  16 (RRCreateMode)
  Serial number of failed request:  31
  Current serial number in output stream:  31

So I haven't got to try this part yet:
Code: Select all
xrandr --addmode VGA-0 1920x1080
xrandr --output VGA-0 --mode 1920x1080

System Specs:
Code: Select all
i5 4-core
Linux Mint 14 Nadia (64bit)

Two identical Samsung SyncMaster SA300 monitors

System Info:
VGA compatible controller      : NVIDIA Corporation GK107 [GeForce GT 630] (rev a1) (prog-if 00 [VGA controller])

Resolution      : 3616x1080 pixels
Vendor      : The X.Org Foundation
Version      : 1.13.0
Monitor 0      : 1360x768 pixels
Monitor 1      : 1920x1080 pixels

Vendor      : NVIDIA Corporation
Renderer      : GeForce GT 630/PCIe/SSE2
Version      : 4.2.0 NVIDIA 304.43
Direct Rendering      : Yes
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