Comment 124 for bug 946899

OK,

I'm getting better results with the following settings:

ALREADY TRIED:

Disable VT-d(Intel Virtualization Technologies) in the BIOS

/etc/default/grub:

GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_pstate=disable"

then

$ sudo update-grub

and

/etc/modprobe.d/i915.conf:

options i915 semaphores=1

then

$ sudo update-initramfs -u

NOT TRIED:

/etc/X11/xorg.conf.d/20-intel.conf
 Section "Device"
    Identifier "old intel stuff"
    Driver "intel"
    Option "Shadow" "True"
    Option "DRI" "false"
 EndSection

/etc/X11/xorg.conf.d/20-intel.conf

Section "Device"
   Identifier "Intel Graphics"
   Driver "intel"
   Option "NoAccel" "True"
EndSection

/usr/share/X11/xorg.conf.d/20-intel.conf:

Code:
Section "Device"
   Identifier "Intel Graphics"
   Driver "intel"
   Option "AccelMethod" "uxa"
EndSection