Comment 173 for bug 22336

Nice one bmjbmj.

I would still like the OS to not shutdown given there are other
options to this problem. A best of both would be really nice.

I managed to clean my heatsink this weekend. Inspection from the
outside looked ok, but inside a big dust mass definitely affecting
airflow. Now this is shifted, the laptop compiled a kernel at full
speed without incident.

Heat transfer compound was also added - their strip of tape looked a bit shit.

acpitool actually shows my CPU temperature occasionally going to 100C
but no shutdowns, on the whole its running 10-20C cooler than before.

Rob.

On 28/05/07, bmjbmj <email address hidden> wrote:
> Hello (sorry for my bad englich)
>
> I think have "solved" the "bugg" for the 15xx line of Acer computers
> under kubuntu 7.4.
>
> We are swtching to kubuntu at my work and i started instaling on 37
> Aspire computers. All of them 2-1 yers old and used in a office that is
> cleand 2 times a week. Of the 37 computers 11 crached at instal. Msg
> somthing about 90 degree and over limmit then black screen and shutdown.
> I'm an electric enginger and was very suprised that windows dident
> report the same. I investigated what I belived was a bug and read this
> bug info. Then I checked CPU speed under Windows and it was 800 Mhz on
> all computers. This is not an bugg, it is a construction fault! And i'm
> suprised that the computer does not sound an alarm (this is standard on
> desktops and servers). I phoned Acer but thay blamed Linux so I moved 3
> computers down to our factory and disasambeld them. A thick burr of dust
> hade asambled around the air duct from the fan (monted at the top of the
> keboard area) and the exhust at the back of the computer. I used clean
> oilfree air at 2 bar from a wall outlet. The dust did not go away so I
> increased the presur to 6 bar and finaly the dust exploded in a smal
> cloud. I didn't disasamble the rest of the computers but used compresed
> olifree air on them to. After cleaning all computers kubuntu instaled
> whide out any problmem. I also strestested 7 of them for 24 houers and
> thy ran at 2200 Mhz whide out problem. I have instaled a dustfilter on
> top of the air intake and informed user to periodicaly test 2200Mhz
> operation for 30 minutes from the control panel. The CPU now alters
> speed from 2200Mhz on full load (CAD calculation) to 800Mhz under e.g
> Mozilla.
>
> Thank you all for constructing a OS that has a warningsystem to inform
> the operator of faults and thanks for this buginfo!
>
> --
> CPU overheats during high usage "throttling <not supported>"
> https://bugs.launchpad.net/bugs/22336
> You received this bug notification because you are a direct subscriber
> of the bug.
>