Installing Intel Graphics Updates from ubuntu-x-swat seems to fix this problem:
https://launchpad.net/~ubuntu-x-swat/+archive/intel-graphics-updates
It features the open source Intel graphics stack 12.07 release.
While it doesn't seem to be too stable, there are no problems (including
invisible icons) with a fresh install of cairo-dock version 3.2.1 from
the launchpad ppa. The problems reappear when a ~/.config/cairo-dock/
directory is ported from another existing system, and this even causes
kwin to crash. I will use cairo dock further and add/remove icons and
applets to see if the drivers are stable.
My driver details after installing the graphics stack updates are as
follows:
equilibrium@equbook:~$ lsmod | grep "^i"
iwlwifi 401148 0
i915 478239 2
i2c_algo_bit 13423 1 i915
equilibrium@equbook:~$ sudo lshw -C display
*-display
description: VGA compatible controller
product: Ivy Bridge 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:47 memory:f0000000-f03fffff memory:e0000000-efffffff
ioport:3000(size=64)
equilibrium@equbook:~$ glxinfo | grep OpenGL
OpenGL vendor string: VMware, Inc.
OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 0x301)
OpenGL version string: 2.1 Mesa 9.0.1
OpenGL shading language version string: 1.20
OpenGL extensions:
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https://bugs.launchpad.net/bugs/1180646
Title:
cairo-dock rendering issues using openGL backend on intel GPU
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