I had previously asked this question for 18.04, I upgraded to 20.04 hoping it would give some boost. Yet I still have the same high power consumption issue.
Roughly my laptop runs for around 3 hours, and I can hear my CPU fan speed when there is nothing runs.
Powertop status
The battery reports a discharge rate of 351 mW
The power consumed was 7.07 J
The estimated remaining time is 29 hours, 54 minutes
Summary: 1142.5 wakeups/second, 0.0 GPU ops/seconds, 0.0 VFS ops/sec and 12.0% CPU use
Power est. Usage Events/s Category Description
890 mW 19.7 ms/s 195.4 Process [PID 2540] /usr/lib/xorg/Xorg vt2 -displayfd
790 mW 1.2 ms/s 199.6 kWork dbs_work_handler
529 mW 6.3 ms/s 119.3 Process [PID 5179] /usr/lib/firefox/firefox -new-wind
443 mW 1.1 ms/s 111.6 Timer tick_sched_timer
271 mW 16.6 ms/s 55.4 Process [PID 2730] /usr/bin/gnome-shell
250 mW 8.3 ms/s 58.0 Process [PID 12800] /usr/libexec/gnome-terminal-serve
207 mW 1.0 ms/s 51.9 Process [PID 743] [sdma0]
172 mW 3.7 ms/s 42.0 Interrupt [68] amdgpu
161 mW 4.1 ms/s 39.2 Timer hrtimer_wakeup
148 mW 2.6 ms/s 27.6 Process [PID 2579] /usr/lib/xorg/Xorg vt2 -displayfd
130 mW 93.9 µs/s 32.8 kWork flush_to_ldisc
122 mW 19.3 ms/s 23.2 Process [PID 5326] /usr/lib/firefox/firefox -contentp
119 mW 5.1 ms/s 28.0 Process [PID 7877] /home/sachith/tsetup.2.3.2/Telegra
84.7 mW 4.8 ms/s 19.6 Process [PID 12655] /usr/lib/firefox/firefox -content
84.1 mW 1.0 ms/s 20.9 Process [PID 5204] /usr/lib/firefox/firefox -new-wind
49.9 mW 205.9 µs/s 12.6 Process [PID 1] /sbin/init splash
40.3 mW 149.0 µs/s 10.1 kWork psi_avgs_work
TLP config :
TLP_ENABLE=1
CPU_SCALING_GOVERNOR_ON_BAT=powersave
CPU_SCALING_MAX_FREQ_ON_AC=0
CPU_SCALING_MIN_FREQ_ON_BAT=0
SCHED_POWERSAVE_ON_BAT=1
RADEON_POWER_PROFILE_ON_BAT=auto
RADEON_DPM_STATE_ON_BAT=battery
RESTORE_THRESHOLDS_ON_BAT="1"
My hardware spec :
AMD Ryzen 7 PRO 2700U APU Integrated Radeon Vega Graphics
Kernel : 5.4.25-050425-generic
I have not installed any AMD-Grapics as they are not officially supported, and tried with 18.04 and they were not working.
No bluetooth connections and WiFi.
Edit: As sancho suggested, I feel this is related to Ubuntu Kernel or firmware for AMD.
Best Answer
It may be the case there is nothing wrong, but you are expecting a battery life based on a very optimistic specification by the manufacturer, and/or an inadequate comparison Windows vs. Linux. As per description below, I would not be worried about any misconfiguration, but otherwise check the list of recommendations to save battery life. This is not a conclusive answer, but perhaps the correct one.
On the specified battery life: Various reported battery lives (see (4) below; usually tested in Windows) are not uniform and thus conclusive on this point, but suggest the specification may be too optimistic.
On Windows vs. Linux: Testing the same PC under Windows, suggests a shorter battery life under Ubuntu. Nevertheless, this might not indicate a problem with your Ubuntu installation, but that this simply what you can get. There are quite a few reports of Ubuntu or other Linux flavors consuming more battery than Windows, even though this is not uniform across the board, see (1) below. So you could try a few actions to optimize your battery usage in Linux, see (2) below. This probably depends a lot on which devices and drivers you have.
1. Power consumption Windows vs. Ubuntu/Linux:
2. Optimizing power uasge in Linux
3. "Analysis" of the output of
powertop:powertop? If you don't know, or even if you do, you could repeat these calculations at various remaining battery lives.Revision of the meaning of these figures, plus comparison of what you may similarly get from Win 10, would perhaps help.
4. HP Probook 445 G6 specification: