Date: Sat, 30 Aug 2008 09:50:46 -0500 From: Josh Paetzel <josh@tcbug.org> To: mobile@freebsd.org Subject: Heat issues on the IBM/Lenovo T60 resolved Message-ID: <200808300950.51698.josh@tcbug.org>
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--nextPart4538579.nCZLaIecaK Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline I've been relatively happy with my T60, with the exception of the heat issu= es=20 it's had since day one. The fan would run full out pretty much all the tim= e,=20 and it would frequently reach 99-100C when doing anything cpu intensive,=20 regardless of OS. If there was any obstruction to the air vents it would=20 shutdown due to overheating. It turns out this is not an uncommon problem with the T60/T61, people eithe= r=20 complain of them being loud, or too hot, or sometimes both. After going down the road of OS tweaks and BIOS flashes I started burning u= p=20 phone lines at Lenovo, and I was finally able to talk to someone who said=20 they had some assembly problems that resulted in far too much thermal paste= =20 being applied to the cpu and heatsink. So, I disassembled my laptop, and sure enough, the thermal paste was applie= d=20 much like a 3 year old applies grape jelly to a sandwich. I cleaned the=20 heatsink, cpu, and gpu and applied some generic thermal paste I found at Be= st=20 Buy. (caveat: The GPU uses a thermal pad that accomodates cooling the=20 memory chips, which are at a different height. I cut out the area where th= e=20 GPU makes contact and used thermal paste there, leaving the rest of the=20 thermal pad in place to contact the ram) Upon reassembly I loaded up both cores with make buildworld and cpuburn, an= d=20 initially feared I had damaged the fan speed sensor, as FreeBSD reported 0= =20 rpm. The cpu temps very slowly climbed to 60C, where the fan spun up to a= =20 nearly inaudible 2000 rpm If I leave it at full CPU utilization the fan will eventually spin up to=20 3000rpm, and temps stabilize at 66-69C. Under normal use the fan rarely=20 runs, a welcome change from it running full out all the time, especially on= =20 battery. =20 I have a friend that was having similar problems with his T61, and has had= =20 similar success after reapplying the thermal paste. =46ow what it's worth, Lenovo said the issue was covered under warranty, I = just=20 disn't feel like going through the hassle of shipping the laptop to them. =20 =2D-=20 Thanks, Josh Paetzel PGP: 8A48 EF36 5E9F 4EDA 5A8C 11B4 26F9 01F1 27AF AECB --nextPart4538579.nCZLaIecaK Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) iEYEABECAAYFAki5XksACgkQJvkB8Sevrsu7cgCeO5t5HwRAEmhrihnOo0HmFM+1 BdwAnjZr7biO01hyVOuzio1zqDjnLsMP =MGlX -----END PGP SIGNATURE----- --nextPart4538579.nCZLaIecaK--
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