On 14.04, with an Intel graphics card, installing GDM (and choosing that as the default) instead of Lightdm worked for me. All of the suggestions with 'sleep' or 'lightdm service restart' were useless for me.
On 14.04, with an Intel graphics card, installing GDM (and choosing that as the default) instead of Lightdm worked for me. All of the suggestions with 'sleep' or 'lightdm service restart' were useless for me.