After further investigation, the root cause is that this GT 425M is not supported by the Nouveau driver, supplied with Ubuntu.
According to the status matrix at http://nouveau.freedesktop.org/wiki/FeatureMatrix (GT425M is part of the NVC0 family), support for it is still incomplete.
After further investigation, the root cause is that this GT 425M is not supported by the Nouveau driver, supplied with Ubuntu.
According to the status matrix at http:// nouveau. freedesktop. org/wiki/ FeatureMatrix (GT425M is part of the NVC0 family), support for it is still incomplete.