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0 pointslhl2y ago0 comments

I think you're way overestimating the power usage of modern displays. The Framework display (BOE095F) backlight based on my personal testing uses ~2.1W at 100% (440 nits) (this is as expected, you can look at datasheets on similar displays like https://datasheetspdf.com/pdf-file/1294460/BOE/NT156FHM-N41/... and the the Pbl on the specsheet).

The old Framework 13s have a 55Wh battery, so 2-3h would require 18.3-27.5W of average power consumption. For context, PL1 (max sustained power limit) of the 12th-gen CPUs are set to 30W in the Framework and when I tested last year, powerstat (calculated w/ ACPI battery info) reported that the laptop my 1260P Framework idles at is about 3.34W w/ backlight off, 4.01W @ 200 nits, and 5.46W @ 100% BL.

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DiabloD32y ago

Huh.

I didn't realize displays had gotten this efficient. I remember when LED backlights were more efficient, but not efficient (huge leap over CCFL, obviously).

So yeah, sounds like the parent comment's Ubuntu is just grossly misconfigured, either out of the box, or merely a few things relevant to Intel Cove-era have to be manually flipped on/off.

I'd love to see if he can repeat it with any other distro, such as with SuSE, or Debian + task-laptop and KDE.

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