Why am I experiencing visual corruption with Intel X4500 graphics card on 14.04?

I am using Ubuntu 14.04 64 bit. After a while of using it, the screens will have rubbish and smudges as in the pic.

Here is my card info and driver:

lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV635/M86 [Mobility Radeon HD 3650]

 lspci -k
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
    Subsystem: Lenovo Device 20e0
    Kernel driver in use: agpgart-intel
00:01.0 PCI bridge: Intel Corporation Mobile 4 Series Chipset PCI Express Graphics Port (rev 07)
    Kernel driver in use: pcieport
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
    Subsystem: Lenovo Device 2115
    Kernel driver in use: i915

Is there a fix for this? Thank you

Solution 1:

I'm out on a limb here, but do you perchance have an X3500 or X4500 Intel card and an odd amount of RAM installed / unequal RAM sticks?

Because this is a known issue with those configurations: https://bugs.freedesktop.org/show_bug.cgi?id=28813

It affects Windows systems too, albeit less severely:

http://support.lenovo.com/en/documents/ht001223

Linux 3.19 does not exhibit this problem, so the solution is simply to apt-get install linux-generic-lts-vivid which will install 3.19 on your 14.04 LTS box.