Comment 45 for bug 141372

You can always install the latest 6.6.3 version instead. The drivers are generally progressing, but with major rework being done, there might be some regressions for some configurations. 6.8 is not even fully released yet so we can expect some improvements before then. However, the 6.8 pre-releases landed in Ubuntu because they already fix more than they break. And what's here broken gets repaired at quite high rate, like in this original bug report.