Comment 30 for bug 399978

That's because Ubuntu sucks and nobody cares, or they can't solve it!!!!

--- On Sat, 11/6/10, Dimitar Mihailov <email address hidden> wrote:

From: Dimitar Mihailov <email address hidden>
Subject: [Bug 399978] Re: Excessive heat versus excessive parkings
To: <email address hidden>
Date: Saturday, November 6, 2010, 12:33 PM

I can also confirm this bug with Acer ASpire ONE 150 with HDD TOSHIBA MK1652GSX on Kubuntu 10.04
HDD temperature rises only when AC is plugged in.
I have to manually set a lower -B setting on hdparm to prevent hdd temperature from going higher than in windows.

I also noticed that if I unplug and again plug the adapter, apparantly
Ubuntu power devil reverts -B setting to a maximum level (or higher
maybe), just so the HDD doesn't do head parking (load_cycle) excessivly.
As a result its temp goes up :).

So I guess maybe Ubuntu devs should set a lower default APM setting when
the laptop is on AC, compromising a few load cycle counts for a more
healthy HDD temperature :).

Apparently doing some head parks when HDD is not used lowers it's temp
and this is what Windows XP does by default on my netbook.

Excessive heat versus excessive parkings
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Status in “linux” package in Ubuntu: Incomplete

Bug description:
If laptop's AC adapter is plugged in, the temperature of the hard disk increases very fast, up to close to 60 Celsius degrees, which is maximum, according to Western Digital specifications. and that happens without any apparent reason, I mean while browsing the Internet, reading online an article or writting emails. The number of parkings is almost constant in an hour.

If the AC adapter is unplugged and only the battery is providing power, the heat is much lower, but the number of parkings is dramatically increasing, almost 15 in a minute (at each 3 or 4 seconds I can hear a click).

I tried ACPI=off but it didn't help, in that case the heat was fast increasing even while running on battery only.

I have a laptop Fujitsu Siemens (Esprimo Mobile V6545) with 4 GB RAM (one added by vendor), and Ubuntu 9.04 Jaunty. And for checking the above parameters, I used the commands: sudo hddtemp /dev/sda and respectively sudo smartctl -a /dev/sda | grep Load_Cycle_Count .

It is so frustating that I think I can't let that continue anymore and try another OS. Please help. Thanks.

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