Messages in this thread | | | Subject | Re: radeonfb i2c regression post-2.6.18. | From | Benjamin Herrenschmidt <> | Date | Sun, 25 Nov 2007 09:25:35 +1100 |
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> Very strange indeed. Another possibility is that there is a hardware > monitoring chip connected to one of the Radeon adapter's I2C buses, and > that holding the I2C lines prevents reading from it, so whatever is > responsible for controlling the temperature prefers to play it safe and > shuts everything down. Somehow it seems more realistic than an actual > overheating (3 seconds is a very short period of time for that), but > we'd need the exact schematics of the hardware, and the details of the > thermal control system, to validate this theory. > > Anyway, no need to worry anymore now that the bug is fixed :)
Actually, that's a possibility yes, though generally Apple put all temp. monitoring chips elsewhere, it could well be the case.
Ben.
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