chrome latest version incompatibility..

[fanatic]

Hi,

My chrome got updated by itself and now none of the programs and
examples are working.
It gives the following error statement:
Uncaught SceneJS.errors.WebGLNotSupportedException: Canvas document
element with ID 'theCanvas' failed to provide a supported WebGL
context

Does anyone know as to how to deal with this?

Thanks,
Manish

[Stephen Bannasch]

At 9:25 PM -0800 3/10/11, fanatic wrote:
>Hi,
>
>My chrome got updated by itself and now none of the programs and
>examples are working.
>It gives the following error statement:
>Uncaught SceneJS.errors.WebGLNotSupportedException: Canvas document
>element with ID 'theCanvas' failed to provide a supported WebGL
>context

Both Chrome and FF have black/block lists that will disable WebGL if the video card is not supported or if a supported carddoesnot have a new enough driver.

WebGL stopped working for my HP 425 laptops in FF v4.

I updated the video driver and it started working again.

I didn't have the problem you are having with Chrome but suspect that Chrome may have a similar policy.

I have a thread on public...@khronos.org titled about this issue:

FF4 webgl doesn't work on ATI Mobility Radeon HD 4250

FF blocklist: https://wiki.mozilla.org/Blocklisting/Blocked_Graphics_Drivers#

Chrome blog post on the issue:
http://blog.chromium.org/2011/03/gpu-acceleration-old-drivers.html

The main FF bugzilla issue:
Block all old drivers for ATI, NVIDIA, and only whitelist the big three, to control risk
https://bugzilla.mozilla.org/show_bug.cgi?id=623338

---- details ----

I just installed FF 4.0 on a HP 425 laptop running Windows 7.
I'll be using a set of these in a classroom with a WebGL app I'm working on.

FF couldn't get a webgl context.

The laptops have ATI Mobility Radeon HD 4250 video cards with 256 MB mem.

WebGL works fine on these latops with Chrome 9 and 10.

GL Extensions Viewer reports:

- OpenGL v3.2, Driver 8.722.1.0, Catalyst, 08-Apr-10
- DirectX 9.0c - August 2004, 10.1, Shader model: vs_4_1, ps_4_1

I was able to get WebGL working by upgrading the OpenGL driver to:

OpenGL 3.3 Catalyst 8.821.0.0, 26-Jan-11

This would not have been easy for a teacher ;-)

The Blocklisting page https://wiki.mozilla.org/Blocklisting/Blocked_Graphics_Drivers#AMD.2FATI_cards
states that FF requires ATI drivers 10.6 or newer. The numbering for latest driver ATI supplies for
the Mobility Radeon HD 4xxx series: 8.821.0.0 doesn't follow this pattern.

details:

http://support.amd.com/us/gpudownload/Pages/index.aspx

System: Notebook Graphics
Product Family: Radeon HD Series
Product: Mobility Radeon HD 4xxx Series
Operating System: Windows 7 - 32 bit

http://support.amd.com/us/gpudownload/Pages/radeonmod_win7-32.aspx

Catalyst Software Suite, Revision 11.2, Release Date 2/15/2011

Which ended up installing the following:

OpenGL v3.3: Catalyst 8.821.0.0, 26-Jan-11