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I'm running Ubuntu 16.04 Xenial and need to control my fan speed for my 32-bit Acer Aspire 5315 with 1 GB RAM. There are old directions for 64-bit here, and some for 32-bit here, but these all assume old paradigms (/proc/acpi/thermalzone instead of the newer /sys/class/thermal—simply replacing the paths doesn't work). The fan never turns on so the system overheats. Acer had a Windows utility that controlled it but this doesn't work on Linux for obvious reasons. The solution appears to be to download a BIOS update issued by Acer, but they've only released a Windows executable and I have Linux on this. I'm trying to find a workaround.

I've installed lm-sensors and fancontrol, but pwmconfig doesn't see any sensors no matter what I try (I've already tried this).

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I had an Aspire 5720Z, and suffered the exact same issue.

I was actually dual-booting with Vista at the time, so applying the BIOS update was not an issue for me.

For you though, you should try running the update EXE inside of Windows PE. Might not get you anywhere, but it's worth a shot.

Disclaimer: It is possible (not likely) that doing this ^^^ could brick the motherboard. Of course, any flashing of the BIOS, regardless of the method, carries this risk.

Of course, your other option is dual-booting with Windows...

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