How to overheat an r100 w/o really trying...
alexdeucher at gmail.com
Thu Mar 17 14:10:14 PDT 2011
On Thu, Mar 17, 2011 at 4:58 PM, James Cloos <cloos at jhcloos.com> wrote:
> [I still use my old laptop with its r100-based 7500 (1002:4c57)
> for my primary X server. All of the clients (including the wm)
> run on a tower; the laptop only runs the X server. The cpu is
> set to powersave; only the r100 gets hot enough to engage fans.]
> The recipe is easy:
> run ftview (from freetype2) on a large font
> hold down a key to scroll through all of the glyphs
> Something like:
> :; ftview 33 /usr/share/fonts/unfonts/UnDotum.ttf
> h (once)
> f10 (hold it down and let it autorepeat)
> It only takes about one second for the r100 to heat enough to, by
> convection, heat the cpu enough to trip the cpu’s emergency mode.
> After that, only power cycling the laptop will restore normal ops.
> (The tcp traffic from doing that is approx 70Mbs client→server.)
Make sure the vents and fans are clear of dust and debris and that the
heat sink is making good contact with the asic.
> James Cloos <cloos at jhcloos.com> OpenPGP: 1024D/ED7DAEA6
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