Tumbler Example Not Working on Ubuntu 10.04

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What steps will reproduce the problem?
Follow the GettingStarted guide up to running the Tumbler example.

What is the expected output? What do you see instead?
-A magenta square should appear.
The page text appears, and if I minimize and maximize the window, a tan box 
appears (the default color of Ubuntu's window backgrounds), but if I click 
it, it disappears.

What version of the product are you using? On what operating system?
Ubuntu 10.04 32-bit, Chromium both builds 47357 and 48002, 
native_client_sdk_0_1_401_0.

Please provide any additional information below.
The Hello World example also has problems, but the Pi Generator and Sine 
Synthesizer work as far as I can tell.

Original issue reported on code.google.com by Tjap...@gmail.com on 23 May 2010 at 7:37

[GoogleCodeExporter]

Do you have hardware OpenGL acceleration turned on?

Original comment by dsprin...@google.com on 10 Jun 2010 at 9:09

• Changed state: Started

[GoogleCodeExporter]

Sell also http://code.google.com/p/chromium/issues/detail?id=45246

Original comment by dsprin...@google.com on 10 Jun 2010 at 9:22

• Changed state: Duplicate