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Hi,
I got myself a new HP Probook 430 G4 (i5-7200U version) half a year ago and installed Arch on it right away. Using different power management tools available (namely, thermald, cpupower and laptop-mode) I managed to get its battery to last 5-6 hours which is enough for my university studies and stuff. However a large system update or two ago (I think I went from kernel 4.18.5/6 to 4.18.9) the battery life reduced drastically and now I get only about 3 hours. A few things I noticed: now htop shows at least one core loaded 100% all the time and more importantly the fan starts spinning like crazy a few minutes after I boot up the laptop (it used to start and stop from time to time a few months ago before I stopped paying attention to it). I'm pretty sure some of my power management tweaks stopped working hence this strange behavior. I use KDE as my daily driver and set my screen brightness and hibernation related settings in its dedicated module for convenience.
Some additional info:
$ cpupower frequency-info
analyzing CPU 0:
driver: intel_pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: Cannot determine or is not supported.
hardware limits: 400 MHz - 3.10 GHz
available cpufreq governors: performance powersave
current policy: frequency should be within 1.80 GHz and 2.50 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency: Unable to call hardware
current CPU frequency: 2.50 GHz (asserted by call to kernel)
boost state support:
Supported: yes
Active: yes
$ sensors
pch_skylake-virtual-0
Adapter: Virtual device
temp1: +45.5°C
acpitz-virtual-0
Adapter: Virtual device
temp1: +53.0°C (crit = +128.0°C)
temp2: +0.0°C (crit = +128.0°C)
temp3: +40.0°C (crit = +128.0°C)
temp4: +39.0°C (crit = +128.0°C)
temp5: +32.0°C (crit = +128.0°C)
temp6: +127.0°C (crit = +128.0°C)
iwlwifi-virtual-0
Adapter: Virtual device
temp1: +38.0°C
coretemp-isa-0000
Adapter: ISA adapter
Package id 0: +54.0°C (high = +100.0°C, crit = +100.0°C)
Core 0: +49.0°C (high = +100.0°C, crit = +100.0°C)
Core 1: +54.0°C (high = +100.0°C, crit = +100.0°C)
Couldn't get lm_sensors to show fan rpm, but still. As for the laptop-mode-tools daemon, I only used intel-hda-powersave, sched-mc-power-savings, sched-smt-power-savings, terminal-blanking and wireless-power plugins with pretty much default settings. All of the aforementioned tools were configured as systemd services. I tried disabling every one of them, and after cpupower stopped the fan started spinning even louder than before (who would have thought). If you could point me at something I should look at further I will greatly appreciate it. Otherwise the problem might be hardware-related but I doubt it would've shown up like this.
Last edited by dr3amyxen0 (2018-09-30 22:03:38)
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So the problem was somehow related to lo_kde5filepicker. For some reason it managed to auto-start and load up the processor 100% according to htop.
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