I notice changes after reinstalling the intel driver. The name of my
display port change from eDP-01 to eDP1. After that, the high CPU issue
disappear and resolved.
#sudo lshw -C video
*-display
description: VGA compatible controller
product: 3rd Gen Core processor Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:45 memory:a0000000-a03fffff memory:90000000-9fffffff
ioport:2000(size=64)
#glxinfo | grep -i string
server glx vendor string: SGI
server glx version string: 1.4
client glx vendor string: Mesa Project and SGI
client glx version string: 1.4
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile
OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.3.0-devel
OpenGL core profile shading language version string: 3.30
OpenGL version string: 3.0 Mesa 10.3.0-devel
OpenGL shading language version string: 1.30
OpenGL ES profile version string: OpenGL ES 3.0 Mesa 10.3.0-devel
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.0
# dpkg-query --show xserver-xorg-video-intel
xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1
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https://bugs.launchpad.net/bugs/1268146
Title:
Very high cpu usage for compiz in 14.04 (mesa incorrectly using
llvmpipe)
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