This affects me too: Acceleration and WebGL worked fine in Ubuntu 14.04, and broke after upgrading to 14.10.
I use Google Chrome (google-chrome-stable 39.0.2171.99-1), also with an Intel integrated GPU (Lenovo G580 laptop), and Mesa 10.3.0.
The LIBGL_DRI3_DISABLE=1 workaround works for me: i applied it in ~/.local/share/applications/google-chrome.desktop, and WebGL functionality seems to be restored.
I haven't run it like this for very long, but it seems stable so far.
This affects me too: Acceleration and WebGL worked fine in Ubuntu 14.04, and broke after upgrading to 14.10.
I use Google Chrome (google- chrome- stable 39.0.2171.99-1), also with an Intel integrated GPU (Lenovo G580 laptop), and Mesa 10.3.0.
The LIBGL_DRI3_ DISABLE= 1 workaround works for me: i applied it in ~/.local/ share/applicati ons/google- chrome. desktop, and WebGL functionality seems to be restored.
I haven't run it like this for very long, but it seems stable so far.