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Im quite new to linux. I bought a new laptop (Aero 15x w/ Intel 7th gen and GTX 1070 MaxQ) and made a fresh Ubuntu 18.04 install. Now I was trying to increase battery life as i get just around 3 hours or so, compared to ~7 on Windows.

I have TLP and Powertop and what I have found in Powertop is, that the network interfaces wlp3s0 (iwlwifi) drains around 14W which cannot be true.

I tried to ook it up and just found https://forums.whirlpool.net.au/archive/2551533 with the same problem but now solution. The people there were just talking that it is impossible for a wifi card to use so much power, so I would also guess that it is something with the nvidia gpu.

I run the 390.48, 4.15.0-20-generic driver and have nvidia prime installed but it is actually set to the Intel gpu.

Would really appreciate any help bc I dont want to use Windows but right now Ubuntu makes it really difficult for me.

Cheers

PS: Im happy to give more information if needed.

EDIT: I found that this is a known bug in 18.04, that the eGPU does not turn off. It is already on Lauchpad: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1765363 Should I keep my post here or delete it?

  • try installing laptop-mode-tools – Joshua Besneatte May 9 '18 at 18:04
  • from reading that link, the noveau driver fixed it for someone. Hit alt+f1 and search for updates. Click on Software & Updates and under additional drivers select the noveau driver. if things work better with noveau... install the proprietary driver per this howto linuxandubuntu.com/home/… once you finish with step three run software and updates and install the recommended driver there. – Joshua Besneatte May 9 '18 at 18:08
  • thanks for the quick reply. The problem is that when i change to the noveau driver and reboot and check in software and updates which driver is in use it is greyed out and has a new point which is activated and says contiune using manually installed driver. when checking with lshw -c video, i see that for the nvidia card it says noveua and for the intel i915. The problem is, that the battery drain is still the same in powertop. – DoubleBass May 9 '18 at 18:39
  • Through this post I found about the bug you linked to (thank you!). So I think it's useful to others who might stumble upon it as well and you should probably keep it. Maybe add your own last edit as an answer because it's a valid one. – Waleed Abdulla Jun 2 '18 at 8:34
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EDIT: I found that this is a known bug in 18.04, that the eGPU does not turn off. It is already on Lauchpad: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1765363 Should I keep my post here or delete it?

There exists a workaround: https://github.com/timrichardson/Prime-Ubuntu-18.04

But I hope that they will change it again in the next version of Ubuntu as it worked just fine before 18.04

EDIT November 2018: I did a clean reinstall of Ubuntu 18.10 and now everything works fine. Switching between Intel and NVidia GPU is working.

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