The issue persists on 19.04.
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https://bugs.launchpad.net/bugs/1778011
Title:
SRU: PRIME Power Saving mode draws too much power
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After seeing Alex's post, I tried installing 410.104-0ubuntu0~18.10.1 from
ppa:graphics-drivers.
Using 4.18.0-16-generic kernel.
I find that when I use Intel profile, powertop reports the nvidia card as 0%
active, and the setting in Tunables shows up as Good.
However, /proc/acpi/bbswitch
> * If I understand correctly, the bug does not occur in Ubuntu 18.10.
The user can switch seamlessly between using the Intel or the Nvidia
discrete graphics card. Is this correct?
@jespestana
No, this bug is affecting me on 18.10.
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I can confirm that installing nvidia-390 through the Ubuntu driver dialog, and
then using nvidia-settings or prime-select to set intel keeps the nvidia card
on for me on my GeForce 840M laptop.
I can also confirm Installing bbswitch-dkms and turning it off through bbswitch
works.
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