[Bug 30922] [radeon] Noisy fan with Radeon R600 and Toshiba Satellite L500-164

[<bug...@bu...>]

https://bugzilla.kernel.org/show_bug.cgi?id=30922





--- Comment #4 from Denis Washington <de...@on...>  2011-05-27 09:30:10 ---
I have talked to Dave Airlie on IRC (#radeon at freenode) today and it seems
that my assumption that thermal sensor access is needed for proper fan control
is wrong. Rather, the GPU seems to do fan control automatically and can only be
influenced by the driver by giving a new policy table to the graphics card's
BIOS.

The radeon driver doesn't currently do this, however, and relies on the BIOS'
defaults, which however seem to be bad on my machine. This is why my fan mostly
runs in full speed.

Dave says he thinks that there's some of the code lying around inside AMD to do
proper fan control setup, but still in need of a lot of review. If this is the
case, I would be happy to test the code once it's published in git.

(Please correct me if I am wrong about anything I've written here.)

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