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Hello everyone!
I've just bought a Samsung Chronos 7 (700Z5A). As usual, the first task was to install Arch Linux. Right after setup I noticed that the CPU fan was nearly constantly running. This is not only annoying but also drains the battery quite quickly.
Things I've done so far:
- CPU governor is "ondemand", setting the cpu to the lowest level during normal operation.
- CPU workload is minimal (0.1% - 2%)
- Played with 'powertop'
- acpi fully working
- The Intel Integrated Graphics are already forced to
pcie_aspm=force i915.i915_enable_rc6=1
which should reduce its power consumption and hence cool down the CPU
- Adding to the above, I've also played around with the i915's module settings:
options i915 modeset=1
options i915 i915_enable_rc6=1
options i915 i915_enable_fbc=1
options i915 lvds_downclock=1
'sensors' outputs this:
[ottona@neotokio ~]$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1: +62.0°C (crit = +99.0°C)
temp2: +29.8°C (crit = +99.0°C)
radeon-pci-0100
Adapter: PCI adapter
temp1: -128.0°C
coretemp-isa-0000
Adapter: ISA adapter
Physical id 0: +67.0°C (high = +86.0°C, crit = +100.0°C)
Core 0: +62.0°C (high = +86.0°C, crit = +100.0°C)
Core 1: +66.0°C (high = +86.0°C, crit = +100.0°C)
Core 2: +66.0°C (high = +86.0°C, crit = +100.0°C)
Core 3: +64.0°C (high = +86.0°C, crit = +100.0°C)
[ottona@neotokio ~]$
...which is around 15 - 20°C above the levels I read on Windows.
Maybe someone knows another approach to the problem? Could also be that I'm too focused on the i915 that I miss out a very obvious fact that leads to the heating?
Thanks,
p.
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You have to disable dedicated video card.
https://bbs.archlinux.org/viewtopic.php … 6#p1029896
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Well, based on this:
radeon-pci-0100
Adapter: PCI adapter
temp1: -128.0°C
I was assuming that the dGPU is disabled.
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- Played with 'powertop'
What does "played with" mean?
Do you have laptop-mode-tools installed?
- The Intel Integrated Graphics are already forced to
pcie_aspm=force i915.i915_enable_rc6=1
which should reduce its power consumption and hence cool down the CPU
- Adding to the above, I've also played around with the i915's module settings:options i915 modeset=1 options i915 i915_enable_rc6=1 options i915 i915_enable_fbc=1 options i915 lvds_downclock=1
Maybe someone knows another approach to the problem? Could also be that I'm too focused on the i915 that I miss out a very obvious fact that leads to the heating?
Maybe, as you say, you're too focused on i915. Check the output of
lspci -mvknn | grep -B8 i915
The output will be non-empty if your system uses i915.
Assuming you do use i915, you may wish to compare your boot flags with the ones I use:
pcie_aspm=force acpi_osi=Linux acpi_backlight=vendor i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1
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Hi,
i have the same problems with my a Samsung Chronos 7 (14" Version 700Z3A ). My battery keeps up to 2 hours. This is less then the half on windows with over 5 hours.
Of course, i tried the well known tweaks as polylux already described.
- cpufrequtils, (cpupower), laptop mode tools
- i915 options
- disable dGPU
- powertop2
$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1: +63.0°C (crit = +99.0°C)
temp2: +29.8°C (crit = +99.0°C)
radeon-pci-0100
Adapter: PCI adapter
temp1: -128.0°C
Are there any users with less power consumption on Samsung chronos laptops?
Thanks.
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