That should no longer be required. Some cards are blacklisted due to older drivers. Try updating your drivers to the lastest ones from NVIDIA or ATI. If that doesn't --ignore-gpu-blacklist might work but if your card is blacklisted it might crash your browser.
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Did you run Chrome with "–enable-webg" flags set (don't know if they are default on Ubuntu/Linux?
That should no longer be required. Some cards are blacklisted due to older drivers. Try updating your drivers to the lastest ones from NVIDIA or ATI. If that doesn't --ignore-gpu-blacklist might work but if your card is blacklisted it might crash your browser.