Ubuntu
xserver-xorg-video-intel package

Graphical corruption

Asked by Joao

Sometimes the desktop just starts drawing a bunch of displaced rectangles. I also get the same kind of corruption in some images on firefox.
I haven't figured out the cause since it seems to be triggered a while after bootup . For a few hours I see no rendering bugs. Rebooting fixes all the corruption.

Screenshot of the corruption:
http://i.imgur.com/1hDPO.jpg

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actionparsnip (andrew-woodhead666) said : 		#1

What is the output of:

sudo lshw -C display; lsb_release -a

Thanks

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Joao (johnsa-515) said : 		#2

  *-display
       description: VGA compatible controller
       product: 82945G/GZ Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 02
       width: 32 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:16 memory:fdf00000-fdf7ffff ioport:ff00(size=8) memory:d0000000-dfffffff memory:fdf80000-fdfbffff
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 11.04
Release: 11.04
Codename: natty

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actionparsnip (andrew-woodhead666) said : 		#3

Yeah thought it was one of those. They are notorious for misbehaving. They are incredibly touchy when it comes to timings and lock up/cause issues if things don't run 100% perfectly.

You may want to try adding the boot option:

nomodeset

May help.

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Joao (johnsa-515) said : 		#4

After I added this boot option when I try to login it says that my hardware can't support unity and logs me into the classic desktop
Is this normal?

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actionparsnip (andrew-woodhead666) said : 		#5

The chip should support Unity and 3D accelleration. I'd remove the option. You could try the xorg edgers ppa but its VERY experimetal and may break things.

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Sitsofe Wheeler (sitsofe) said : 		#6

That screenshot looks very similar to the one in Bug #820881 (https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/820881/comments/2)

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