I followed the suggestion in bug 347527, by installing the edge drivers 2.7.1 in
https://edge.launchpad.net/~ubuntu-x-swat/+archive/x-updates/
The problem seems to be solved.
I followed the suggestion in bug 347527, by installing the edge drivers 2.7.1 in
https:/ /edge.launchpad .net/~ubuntu- x-swat/ +archive/ x-updates/
The problem seems to be solved.