thanks for chiming in. yeah, some surface models are prone to have these issues as well, I remember trying that in windows but with no results. in linux, the i915 driver doesn’t have that option any more, or I suck at reading comprehension… anyhow, not sure that’s the same issue, as my device has these spells also when on AC power but with battery installed. the only times it’s functioning properly is when it’s on AC and with battery removed. but this looks like a promising lead to research further.