mac mini extremely hot when using i915kms

[Huang Wen Hui]

Hi,
I am run 9.1-RC2 under mac mini(A1347), powerd aslo run,
Without i915kms running,  cpu temperature is very low:
% sysctl -a|grep temperature
dev.cpu.0.temperature: 49.0C
dev.cpu.1.temperature: 48.0C
dev.cpu.2.temperature: 43.0C
dev.cpu.3.temperature: 43.0C
dev.cpu.4.temperature: 45.0C
dev.cpu.5.temperature: 45.0C
dev.cpu.6.temperature: 46.0C
dev.cpu.7.temperature: 46.0C

if running i915kms, cpu temperature increase very fast and reach at 93.0C
in 10 minutes,
while CPU usage is very low, almost idle, Any ideas?

% kldstat
Id Refs Address            Size     Name
 1   35 0xffffffff80200000 1323408  kernel
 2    1 0xffffffff81524000 29e8     coretemp.ko
 3    1 0xffffffff81527000 6600     cuse4bsd.ko
 4    1 0xffffffff81612000 15c2     fdescfs.ko
 5    1 0xffffffff81614000 328d     ng_ubt.ko
 6    1 0xffffffff81618000 8b3d     ng_hci.ko
 7    1 0xffffffff81621000 a79      ng_bluetooth.ko
 8    2 0xffffffff81622000 87b2     netgraph.ko
 9    1 0xffffffff8162b000 6091d    i915kms.ko
10    1 0xffffffff8168c000 1241     iicbb.ko
11    4 0xffffffff8168e000 1307     iicbus.ko
12    1 0xffffffff81690000 dc9      iic.ko
13    1 0xffffffff81691000 2c7c2    drm2.ko
% sysctl -a | grep temperature ;
dev.cpu.0.temperature: 92.0C
dev.cpu.1.temperature: 92.0C
dev.cpu.2.temperature: 90.0C
dev.cpu.3.temperature: 91.0C
dev.cpu.4.temperature: 93.0C
dev.cpu.5.temperature: 93.0C
dev.cpu.6.temperature: 90.0C
dev.cpu.7.temperature: 90.0C

--hwh