Aero 17 laptop w/ 9750H processor, nvidia gtx 1660ti, 1080P 144hz monitor
Windows 10 reports 8 hours of battery life
Ubuntu 19.04 reports 2 hours
In Ubuntu 19.04, reporting sky-high 30-40 watt discharge at idle with integrated graphics.
Tested: kernel 5.0.x vs. 5.1.x
Tested: Brightness to lowest setting
Tested: 144hz vs 60hz refresh
Tested: Airplane mode
Tested: powertop –auto-tune
Still consistently between 30-40 watt discharge at idle
Here is the kicker… if I switch to nvidia graphics via prime-select, the power consumption drops to 16-22watts at idle. Almost seems like the high power consumption lies with intel integrated graphics, but that sounds a bit crazy.
I tried to disable the nvidia graphics card in the bios, but doesn't seem to be an option in the bios interface.
Any recommendations? Thanks in advance.
Powerstat output
Time User Nice Sys Idle IO Run Ctxt/s IRQ/s Fork Exec Exit Watts pch_ca iwlwif acpitz x86_pk CPU Freq GPU W
22:48:01 0.3 0.6 0.2 98.9 0.0 1 532 370 14 12 25 -nanE 48.00 40.00 27.80 45.00 1.61 GHz 0.01
22:48:11 0.2 0.0 0.1 99.7 0.0 1 367 217 0 0 2 33.86 47.00 39.00 27.80 45.00 0.80 GHz 0.00
22:48:21 0.6 0.0 0.2 99.2 0.0 1 980 553 0 0 0 34.88 48.00 40.00 27.80 43.00 1.37 GHz 0.08
22:48:31 0.4 0.0 0.2 99.4 0.0 1 823 473 1 0 0 34.09 48.00 38.00 27.80 44.00 0.80 GHz 0.01
22:48:41 0.2 0.0 0.1 99.7 0.0 1 542 337 2 0 8 35.59 48.00 40.00 27.80 43.00 1.31 GHz 0.01
22:48:51 0.2 0.0 0.2 99.6 0.0 1 713 459 11 1 12 34.29 46.00 39.00 27.80 43.00 0.80 GHz 0.00
22:49:01 0.4 0.0 0.1 99.5 0.0 1 541 389 1 0 22 34.82 46.00 40.00 27.80 43.00 1.52 GHz 0.01
22:49:11 0.2 0.0 0.1 99.6 0.0 1 560 328 3 0 0 33.84 46.00 39.00 27.80 43.00 0.80 GHz 0.00
22:49:21 0.2 0.0 0.1 99.7 0.0 1 442 262 0 0 2 34.42 46.00 40.00 27.80 42.00 1.42 GHz 0.01
^C-------- ----- ----- ----- ----- ----- ---- ------ ------ ---- ---- ---- ------ ------ ------ ------ ------ --------- ------
Average 0.3 0.1 0.2 99.5 0.0 1.0 611.1 376.6 3.6 1.4 7.9 34.47 47.00 39.44 27.80 43.44 1.16 GHz 0.01
GeoMean 0.3 0.0 0.1 99.5 0.0 1.0 585.9 362.8 0.0 0.0 0.0 34.47 46.99 39.44 27.80 43.43 1.11 GHz 0.01
StdDev 0.1 0.2 0.0 0.3 0.0 0.0 182.0 99.9 4.9 3.7 9.2 0.53 0.94 0.68 0.00 0.96 0.33 GHz 0.02
-------- ----- ----- ----- ----- ----- ---- ------ ------ ---- ---- ---- ------ ------ ------ ------ ------ --------- ------
Minimum 0.2 0.0 0.1 98.9 0.0 1.0 366.7 217.4 0.0 0.0 0.0 33.84 46.00 38.00 27.80 42.00 0.80 GHz 0.00
Maximum 0.6 0.6 0.2 99.7 0.0 1.0 979.5 552.9 14.0 12.0 25.0 35.59 48.00 40.00 27.80 45.00 1.61 GHz 0.08
-------- ----- ----- ----- ----- ----- ---- ------ ------ ---- ---- ---- ------ ------ ------ ------ ------ --------- ------
Summary:
System: 34.47 Watts on average with standard deviation 0.53
GPU: 0.01 Watts on average with standard deviation 0.02
Note: Power calculated from battery capacity drain, may not be accurate.
C-State Resident Count Latency
C10 96.677% 30301 890
C9 0.106% 539 480
C8 2.261% 10202 200
C7s 0.002% 18 124
C6 0.271% 4707 85
C3 0.011% 782 70
C1E 0.027% 943 10
C1 0.027% 439 2
POLL 0.000% 41 0
C0 0.619%
PowerTop Output
The battery reports a discharge rate of 36.8 W
The power consumed was 0.00 J
The estimated remaining time is 1 hours, 37 minutes
Summary: 796.7 wakeups/second, 0.0 GPU ops/seconds, 0.0 VFS ops/sec and 9.1% CPU use
Usage Events/s Category Description
316.5 µs/s 170.6 Timer tick_sched_timer
21.9 ms/s 124.6 Process [PID 4719] powertop
0.0 µs/s 0.00 Process [PID 1954] /usr/bin/pulseaudio --daemonize=no
5.8 ms/s 114.1 Interrupt PS/2 Touchpad / Keyboard / Mouse
8.3 ms/s 65.2 Process [PID 1886] /usr/bin/gnome-shell
Best Answer
Thanks for the suggestions @Raffa. It helped me discover this solution, which brought my power consumption from 30+ to 10 watts. Definitely has to do with Nvidia gpu drawing power even when Intel integrated is selected.
Source: https://askubuntu.com/a/1145796/1002029