Ubuntu
xserver-xorg-video-intel package

  1. Bug #1867668
  2. Comment #23

Comment 23 for bug 1867668

Revision history for this message
Alex (elevat) wrote : Re: Visual artifacts in Gnome Shell when using the old 'intel' Xorg driver

I have my minipc server Gigabite Brix 4105 and the monitor is not connected to it. Installed Ubuntu Desktop 12.04.2.
I control it from my PC using VNC and no visual artifacts.

This is done through 20-intel.conf

Section "Device"
    Identifier "intelgpu0"
    Driver "intel"
    Option "VirtualHeads" "1"
    Option "TearFree" "true"
    Option "TripleBuffer" "true"
    Option "DRI" "false"
EndSection

I added the following commands to my startup script:

xrandr --newmode "1920x1080" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
xrandr --addmode VIRTUAL1 1920x1080
xrandr --output VIRTUAL1 --mode 1920x1080 --right-of HDMI1
xrandr -d :0 --output VIRTUAL1 --primary --auto

Generate modeline with gtf or cvt (Replace 1920 1080 with your preferred resolution). Here is what I get:
$ 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