Comment 172 for bug 22336

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!