I'm having a similar problem using a DELL Inspiron 3646 with an Intel
J2900 CPU.
I'm having good 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
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https://bugs.launchpad.net/bugs/1454868
Title:
Ubuntu 15.04 Freezes Totally
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