Setting cstate=1 because of freezes is bad for battery life

Hi, I just installed a fresh Manjaro i3 on my new Acer Aspire A514-54. After fixing a bunch of problems related to sound, bluetooth audio, I am just left with one issue that has something to do with cstates.

When I boot the laptop with the default cstate of 3 in grub options, after some heavy operations, it just froze in the middle with nothing working, no inputs nothing. My only solution was to hard restart by long pressing the power key.

I have now set it to 1, but this has caused a huge issue with my battery lasting around 3 hours for 70% of usage.

I want to dive deep and understand why this maybe happening, journalctl has nothing here so looking for the next set of steps.


inxi -Faz output:

System:    Kernel: 5.11.6-1-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.0 
           parameters: BOOT_IMAGE=/boot/vmlinuz-5.11-x86_64 root=UUID=da650711-9dc4-4715-b66b-493ad8c8ab72 rw apparmor=1 
           security=apparmor resume=UUID=163aa963-260f-49e6-90b7-3938b5b976ff udev.log_priority=3 intel_idle.max_cstate=1 
           splash quite 
           Desktop: i3 4.19.1 info: i3bar vt: 7 dm: LightDM 1.30.0 Distro: Manjaro Linux base: Arch Linux 
Machine:   Type: Laptop System: Acer product: Aspire A514-54 v: V1.08 serial: <filter> 
           Mobo: TGL model: Lily_TL v: V1.08 serial: <filter> UEFI: Insyde v: 1.08 date: 01/22/2021 
Battery:   ID-1: BAT1 charge: 20.2 Wh (42.5%) condition: 47.5/47.9 Wh (99.2%) volts: 11.1 min: 11.4 model: Murata AP18C4K 
           type: Li-ion serial: <filter> status: Discharging cycles: 15 
CPU:       Info: Quad Core model: 11th Gen Intel Core i5-1135G7 bits: 64 type: MT MCP arch: Tiger Lake family: 6 
           model-id: 8C (140) stepping: 1 microcode: 60 cache: L2: 8 MiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 38720 
           Speed: 1654 MHz min/max: 400/4200 MHz Core speeds (MHz): 1: 1654 2: 1653 3: 1849 4: 1731 5: 1824 6: 1717 7: 1750 
           8: 1691 
           Vulnerabilities: Type: itlb_multihit status: Not affected 
           Type: l1tf status: Not affected 
           Type: mds status: Not affected 
           Type: meltdown status: Not affected 
           Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via prctl and seccomp 
           Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization 
           Type: spectre_v2 mitigation: Enhanced IBRS, IBPB: conditional, RSB filling 
           Type: srbds status: Not affected 
           Type: tsx_async_abort status: Not affected 
Graphics:  Device-1: Intel Iris Xe Graphics vendor: Acer Incorporated ALI driver: i915 v: kernel bus-ID: 00:02.0 
           chip-ID: 8086:9a49 class-ID: 0300 
           Device-2: Quanta HD User Facing type: USB driver: uvcvideo bus-ID: 1-8:2 chip-ID: 0408:a061 class-ID: 0e02 
           Display: x11 server: X.Org 1.20.10 compositor: picom v: git-dac85 driver: loaded: intel unloaded: modesetting 
           alternate: fbdev,vesa display-ID: :0 screens: 1 
           Screen-1: 0 s-res: 2189x1232 s-dpi: 96 s-size: 577x325mm (22.7x12.8") s-diag: 662mm (26.1") 
           Monitor-1: eDP1 res: 1920x1080 dpi: 157 size: 310x170mm (12.2x6.7") diag: 354mm (13.9") 
           OpenGL: renderer: Mesa Intel Xe Graphics (TGL GT2) v: 4.6 Mesa 20.3.4 direct render: Yes 
Audio:     Device-1: Intel Tiger Lake-LP Smart Sound Audio vendor: Acer Incorporated ALI driver: sof-audio-pci 
           alternate: snd_hda_intel,snd_sof_pci bus-ID: 00:1f.3 chip-ID: 8086:a0c8 class-ID: 0401 
           Sound Server-1: ALSA v: k5.11.6-1-MANJARO running: yes 
           Sound Server-2: JACK v: 0.125.0 running: no 
           Sound Server-3: PulseAudio v: 14.2 running: yes 
           Sound Server-4: PipeWire v: 0.3.23 running: no 
Network:   Device-1: Intel Wi-Fi 6 AX201 driver: iwlwifi v: kernel port: 4000 bus-ID: 00:14.3 chip-ID: 8086:a0f0 
           class-ID: 0280 
           IF: wlp0s20f3 state: up mac: <filter> 
           Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: Acer Incorporated ALI driver: r8169 
           v: kernel port: 3000 bus-ID: 02:00.0 chip-ID: 10ec:8168 class-ID: 0200 
           IF: enp2s0 state: down mac: <filter> 
Bluetooth: Device-1: Intel type: USB driver: btusb v: 0.8 bus-ID: 1-10:3 chip-ID: 8087:0026 class-ID: e001 
           Report: This feature requires one of these tools: hciconfig/bt-adapter 
Drives:    Local Storage: total: 476.94 GiB used: 19.74 GiB (4.1%) 
           SMART Message: Required tool smartctl not installed. Check --recommends 
           ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Kingston model: OM8PCP3512F-AA size: 476.94 GiB block-size: 
           physical: 512 B logical: 512 B speed: 31.6 Gb/s lanes: 4 rotation: SSD serial: <filter> rev: ECFK52.3 temp: 40.9 C 
           scheme: GPT 
Partition: ID-1: / raw-size: 46 GiB size: 45.03 GiB (97.89%) used: 19.69 GiB (43.7%) fs: ext4 dev: /dev/nvme0n1p6 
           maj-min: 259:6 
           ID-2: /boot/efi raw-size: 100 MiB size: 96 MiB (96.00%) used: 51.3 MiB (53.4%) fs: vfat dev: /dev/nvme0n1p1 
           maj-min: 259:1 
Swap:      Kernel: swappiness: 60 (default) cache-pressure: 100 (default) 
           ID-1: swap-1 type: partition size: 4 GiB used: 0 KiB (0.0%) priority: -2 dev: /dev/nvme0n1p5 maj-min: 259:5 
Sensors:   System Temperatures: cpu: 60.0 C mobo: N/A 
           Fan Speeds (RPM): N/A 
Info:      Processes: 253 Uptime: 5h 51m wakeups: 10673 Memory: 7.58 GiB used: 3.83 GiB (50.6%) Init: systemd v: 247 
           tool: systemctl Compilers: gcc: 10.2.0 Packages: pacman: 1121 lib: 292 Shell: Zsh v: 5.8 running-in: scroll 
           inxi: 3.3.03